TY  - JOUR
AU  - Petrović, Srđan
AU  - Stanković, Miroslav
AU  - Pavlović, Stefan
AU  - Mojović, Zorica
AU  - Radić, Nenad
AU  - Mojović, Miloš
AU  - Rožić, Ljiljana
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4722
AB  - This paper presents a new two-step method for the synthesis of NiO/TiO2–CeO2 semiconductors, which implies, the first, the mechanochemical synthesis of TiO2–CeO2 support, and the second is the doping of different NiO contents by chemical precipitation in an aqueous medium in an ambient atmosphere. Structural, optical, electrochemical and photocatalytic properties of NiO/TiO2–CeO2 semiconductors were examined. The influence of different NiO contents on the electrocatalytic activity of NiO/TiO2–CeO2 samples was investigated in the oxygen evolution reaction and the results showed that the samples with the lowest NiO content have the highest electroactivity. The photocatalytic activity was determined during the phenol decomposition process over the samples with different NiO:TiO2–CeO2 ratios and the best photocatalytic activity is observed for the sample with 4.1 mol% NiO. The sample with the lowest NiO content obtained by a relatively simple method is suitable for use both as an electrode material in the oxygen evolution reaction and as a photocatalyst in the phenol decomposition process.
PB  - Springer
T2  - Reaction Kinetics, Mechanisms and Catalysis
T1  - Nickel oxide on mechanochemically synthesized TiO2–CeO2: photocatalytic and electrochemical activity
VL  - 133
SP  - 1097
EP  - 1110
DO  - 10.1007/s11144-021-02014-8
ER  - 

@article{
author = "Petrović, Srđan and Stanković, Miroslav and Pavlović, Stefan and Mojović, Zorica and Radić, Nenad and Mojović, Miloš and Rožić, Ljiljana",
year = "2021",
abstract = "This paper presents a new two-step method for the synthesis of NiO/TiO2–CeO2 semiconductors, which implies, the first, the mechanochemical synthesis of TiO2–CeO2 support, and the second is the doping of different NiO contents by chemical precipitation in an aqueous medium in an ambient atmosphere. Structural, optical, electrochemical and photocatalytic properties of NiO/TiO2–CeO2 semiconductors were examined. The influence of different NiO contents on the electrocatalytic activity of NiO/TiO2–CeO2 samples was investigated in the oxygen evolution reaction and the results showed that the samples with the lowest NiO content have the highest electroactivity. The photocatalytic activity was determined during the phenol decomposition process over the samples with different NiO:TiO2–CeO2 ratios and the best photocatalytic activity is observed for the sample with 4.1 mol% NiO. The sample with the lowest NiO content obtained by a relatively simple method is suitable for use both as an electrode material in the oxygen evolution reaction and as a photocatalyst in the phenol decomposition process.",
publisher = "Springer",
journal = "Reaction Kinetics, Mechanisms and Catalysis",
title = "Nickel oxide on mechanochemically synthesized TiO2–CeO2: photocatalytic and electrochemical activity",
volume = "133",
pages = "1097-1110",
doi = "10.1007/s11144-021-02014-8"
}

Petrović, S., Stanković, M., Pavlović, S., Mojović, Z., Radić, N., Mojović, M.,& Rožić, L.. (2021). Nickel oxide on mechanochemically synthesized TiO2–CeO2: photocatalytic and electrochemical activity. in Reaction Kinetics, Mechanisms and Catalysis
Springer., 133, 1097-1110.
https://doi.org/10.1007/s11144-021-02014-8

Petrović S, Stanković M, Pavlović S, Mojović Z, Radić N, Mojović M, Rožić L. Nickel oxide on mechanochemically synthesized TiO2–CeO2: photocatalytic and electrochemical activity. in Reaction Kinetics, Mechanisms and Catalysis. 2021;133:1097-1110.
doi:10.1007/s11144-021-02014-8 .

Petrović, Srđan, Stanković, Miroslav, Pavlović, Stefan, Mojović, Zorica, Radić, Nenad, Mojović, Miloš, Rožić, Ljiljana, "Nickel oxide on mechanochemically synthesized TiO2–CeO2: photocatalytic and electrochemical activity" in Reaction Kinetics, Mechanisms and Catalysis, 133 (2021):1097-1110,
https://doi.org/10.1007/s11144-021-02014-8 . .

TY  - CONF
AU  - Pavlović, Stefan
AU  - Marinković, Dalibor
AU  - Milovanović, Biljana
AU  - Tišma, Marina
AU  - Mojović, Ljiljana
AU  - Stanković, Miroslav
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4721
AB  - Waste-based zeolite supported CaO catalyst (20CaO/ZMFA) was synthesized by ultrasound-assisted impregnation from alcoholic suspension. Zeolite was previously synthesized from lignite coal fly ash (FA) by alkali activation in miniature rotating autoclave reactors (6.25 M NaOH, 260 °C, 4 h), whereas CaO was prepared by chicken eggshell (ES) calcination (900 ºC, 4 h). The final catalyst was obtained by precursor calcination at 550 °C, 4 h. The obtained catalyst was used for catalyst stability tests (reusability and leaching) in transesterification (methanol/oil molar ratio of 12/1, catalyst concentration of 4 wt%, and temperature of 60 °C) of three types of oily feedstocks, fresh sunflower oil (SFO), waste cooking oil (WCO) and model thermal treated (230 °C, 5 days) sunflower oil (SFOTT). The concentration of triacylglycerols (TAGs) and fatty acid methyl esters (FAMEs) was determined by GC and HPLC, respectively. The 20CaO/ZMFA exhibited high activity (FAME content > 96.5 % for 180 min) in the transesterification of all three oily feedstocks. The stability tests are shown that catalyst is stable even in four reaction cycles for SFO and WCO, whereas the Ca 2+ leaching was significantly lower compared to similar catalytic systems.
PB  - Fuel Science Center
C3  - 9th International Conference Fuel Science - From Production to Propulsion 2021
T1  - Stability of waste-based zeolite supported CaO catalyst for biodiesel production from waste oily feedstocks
UR  - https://hdl.handle.net/21.15107/rcub_cer_4721
ER  - 

@conference{
author = "Pavlović, Stefan and Marinković, Dalibor and Milovanović, Biljana and Tišma, Marina and Mojović, Ljiljana and Stanković, Miroslav",
year = "2021",
abstract = "Waste-based zeolite supported CaO catalyst (20CaO/ZMFA) was synthesized by ultrasound-assisted impregnation from alcoholic suspension. Zeolite was previously synthesized from lignite coal fly ash (FA) by alkali activation in miniature rotating autoclave reactors (6.25 M NaOH, 260 °C, 4 h), whereas CaO was prepared by chicken eggshell (ES) calcination (900 ºC, 4 h). The final catalyst was obtained by precursor calcination at 550 °C, 4 h. The obtained catalyst was used for catalyst stability tests (reusability and leaching) in transesterification (methanol/oil molar ratio of 12/1, catalyst concentration of 4 wt%, and temperature of 60 °C) of three types of oily feedstocks, fresh sunflower oil (SFO), waste cooking oil (WCO) and model thermal treated (230 °C, 5 days) sunflower oil (SFOTT). The concentration of triacylglycerols (TAGs) and fatty acid methyl esters (FAMEs) was determined by GC and HPLC, respectively. The 20CaO/ZMFA exhibited high activity (FAME content > 96.5 % for 180 min) in the transesterification of all three oily feedstocks. The stability tests are shown that catalyst is stable even in four reaction cycles for SFO and WCO, whereas the Ca 2+ leaching was significantly lower compared to similar catalytic systems.",
publisher = "Fuel Science Center",
journal = "9th International Conference Fuel Science - From Production to Propulsion 2021",
title = "Stability of waste-based zeolite supported CaO catalyst for biodiesel production from waste oily feedstocks",
url = "https://hdl.handle.net/21.15107/rcub_cer_4721"
}

Pavlović, S., Marinković, D., Milovanović, B., Tišma, M., Mojović, L.,& Stanković, M.. (2021). Stability of waste-based zeolite supported CaO catalyst for biodiesel production from waste oily feedstocks. in 9th International Conference Fuel Science - From Production to Propulsion 2021
Fuel Science Center..
https://hdl.handle.net/21.15107/rcub_cer_4721

Pavlović S, Marinković D, Milovanović B, Tišma M, Mojović L, Stanković M. Stability of waste-based zeolite supported CaO catalyst for biodiesel production from waste oily feedstocks. in 9th International Conference Fuel Science - From Production to Propulsion 2021. 2021;.
https://hdl.handle.net/21.15107/rcub_cer_4721 .

Pavlović, Stefan, Marinković, Dalibor, Milovanović, Biljana, Tišma, Marina, Mojović, Ljiljana, Stanković, Miroslav, "Stability of waste-based zeolite supported CaO catalyst for biodiesel production from waste oily feedstocks" in 9th International Conference Fuel Science - From Production to Propulsion 2021 (2021),
https://hdl.handle.net/21.15107/rcub_cer_4721 .

TY  - JOUR
AU  - Pavlović, Stefan
AU  - Marinković, Dalibor
AU  - Kostić, Milan
AU  - Lončarević, Davor
AU  - Mojović, Ljiljana
AU  - Stanković, Miroslav
AU  - Veljković, Vlada B.
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4035
AB  - Lignite coal fly ash (FA) from a domestic thermal power plant was converted into a pure cancrinite zeolitic material (ZMFA) using a novel, custom-made, rotating autoclave reactor system by a short-term alkali activation process. The obtained ZMFA was used as catalyst support of calcium oxide as an active component derived from waste chicken eggshells (ES). The ZMFA supported calcium oxide catalyst (xCaO/ZMFA) was synthesized by means of the ultrasound-assisted method. The influence of different concentrations of dispersed calcium oxide (x = 5–20 wt%) over ZMFA and thermal treatment at different temperatures (450–600 °C) were studied. The structural and morphological characterization showed that the original cancrinite structure was preserved. The basicity and textural properties indicated the presence of strong active sites in a well-defined pore network suitable for the reactions of bulky organic compounds such as triacylglycerols (TAGs). The highest activity (96.5% of fatty acid methyl esters) in the methanolysis of sunflower oil was achieved with the 20CaO/ZMFA catalyst under reaction conditions: temperature of 60 °C, methanol/oil molar ratio of 12:1, catalyst concentration of 4 wt%, and reaction time of 2 h. It was found that the optimal calcination temperature of the catalyst precursor was 550 °C. At calcination temperatures above 550 °C, the melting of the glassy phase became more intense whereby the molten phase partially reacted with calcium oxide forming the catalytically inactive calcium silicate compounds (wollastonite, larnite, etc.). The rate constants of the two tested kinetic models were correlated with the concentrations of active calcium oxide. The MRPD of both models was low indicating their reliability.
PB  - Elsevier
T2  - Fuel
T1  - The chicken eggshell calcium oxide ultrasonically dispersed over lignite coal fly ash-based cancrinite zeolite support as a catalyst for biodiesel production
VL  - 289
SP  - 119912
DO  - 10.1016/j.fuel.2020.119912
ER  - 

@article{
author = "Pavlović, Stefan and Marinković, Dalibor and Kostić, Milan and Lončarević, Davor and Mojović, Ljiljana and Stanković, Miroslav and Veljković, Vlada B.",
year = "2021",
abstract = "Lignite coal fly ash (FA) from a domestic thermal power plant was converted into a pure cancrinite zeolitic material (ZMFA) using a novel, custom-made, rotating autoclave reactor system by a short-term alkali activation process. The obtained ZMFA was used as catalyst support of calcium oxide as an active component derived from waste chicken eggshells (ES). The ZMFA supported calcium oxide catalyst (xCaO/ZMFA) was synthesized by means of the ultrasound-assisted method. The influence of different concentrations of dispersed calcium oxide (x = 5–20 wt%) over ZMFA and thermal treatment at different temperatures (450–600 °C) were studied. The structural and morphological characterization showed that the original cancrinite structure was preserved. The basicity and textural properties indicated the presence of strong active sites in a well-defined pore network suitable for the reactions of bulky organic compounds such as triacylglycerols (TAGs). The highest activity (96.5% of fatty acid methyl esters) in the methanolysis of sunflower oil was achieved with the 20CaO/ZMFA catalyst under reaction conditions: temperature of 60 °C, methanol/oil molar ratio of 12:1, catalyst concentration of 4 wt%, and reaction time of 2 h. It was found that the optimal calcination temperature of the catalyst precursor was 550 °C. At calcination temperatures above 550 °C, the melting of the glassy phase became more intense whereby the molten phase partially reacted with calcium oxide forming the catalytically inactive calcium silicate compounds (wollastonite, larnite, etc.). The rate constants of the two tested kinetic models were correlated with the concentrations of active calcium oxide. The MRPD of both models was low indicating their reliability.",
publisher = "Elsevier",
journal = "Fuel",
title = "The chicken eggshell calcium oxide ultrasonically dispersed over lignite coal fly ash-based cancrinite zeolite support as a catalyst for biodiesel production",
volume = "289",
pages = "119912",
doi = "10.1016/j.fuel.2020.119912"
}

Pavlović, S., Marinković, D., Kostić, M., Lončarević, D., Mojović, L., Stanković, M.,& Veljković, V. B.. (2021). The chicken eggshell calcium oxide ultrasonically dispersed over lignite coal fly ash-based cancrinite zeolite support as a catalyst for biodiesel production. in Fuel
Elsevier., 289, 119912.
https://doi.org/10.1016/j.fuel.2020.119912

Pavlović S, Marinković D, Kostić M, Lončarević D, Mojović L, Stanković M, Veljković VB. The chicken eggshell calcium oxide ultrasonically dispersed over lignite coal fly ash-based cancrinite zeolite support as a catalyst for biodiesel production. in Fuel. 2021;289:119912.
doi:10.1016/j.fuel.2020.119912 .

Pavlović, Stefan, Marinković, Dalibor, Kostić, Milan, Lončarević, Davor, Mojović, Ljiljana, Stanković, Miroslav, Veljković, Vlada B., "The chicken eggshell calcium oxide ultrasonically dispersed over lignite coal fly ash-based cancrinite zeolite support as a catalyst for biodiesel production" in Fuel, 289 (2021):119912,
https://doi.org/10.1016/j.fuel.2020.119912 . .

TY  - JOUR
AU  - Pavlović, Stefan
AU  - Šelo, Gordana
AU  - Marinković, Dalibor
AU  - Planinić, Mirela
AU  - Tišma, Marina
AU  - Stanković, Miroslav
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4138
AB  - The statistical experimental design (DoE) and optimization (Response Surface Methodology combined with Box–Behnken design) of sunflower oil transesterification catalyzed by waste chicken eggshell-based catalyst were conducted in a custom-made microreactor at 60 °C. The catalyst was synthesized by the hydration–dehydration method and subsequent calcination at 600 °C. Comprehensive characterization of the obtained catalyst was conducted using: X-ray powder diffractometry (XRD), X-ray fluorescence (XRF), Fourier-transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), N2 physisorption, and Hg-porosimetry. Structural, morphological, and textural results showed that the obtained catalyst exhibited high porosity and regular dispersity of plate-like CaO as an active species. The obtained optimal residence time, catalyst concentration, and methanol/oil volume ratio for the continuous reaction in microreactor were 10 min, 0.1 g g−1, and 3:1, respectively. The analysis of variance (ANOVA) showed that the obtained reduced quadratic model was adequate for experimental results fitting. The reaction in the microreactor was significantly intensified compared to a conventional batch reactor, as seen through the fatty acid methyl esters (FAMEs) content after 10 min, which was 51.2% and 18.6%, respectively.
PB  - MDPI
T2  - Micromachines
T1  - Transesterification of Sunflower Oil Over Waste Chicken Eggshell-Based Catalyst in a Microreactor: An Optimization Study
VL  - 12
IS  - 2
SP  - 120
DO  - 10.3390/mi12020120
ER  - 

@article{
author = "Pavlović, Stefan and Šelo, Gordana and Marinković, Dalibor and Planinić, Mirela and Tišma, Marina and Stanković, Miroslav",
year = "2021",
abstract = "The statistical experimental design (DoE) and optimization (Response Surface Methodology combined with Box–Behnken design) of sunflower oil transesterification catalyzed by waste chicken eggshell-based catalyst were conducted in a custom-made microreactor at 60 °C. The catalyst was synthesized by the hydration–dehydration method and subsequent calcination at 600 °C. Comprehensive characterization of the obtained catalyst was conducted using: X-ray powder diffractometry (XRD), X-ray fluorescence (XRF), Fourier-transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM), N2 physisorption, and Hg-porosimetry. Structural, morphological, and textural results showed that the obtained catalyst exhibited high porosity and regular dispersity of plate-like CaO as an active species. The obtained optimal residence time, catalyst concentration, and methanol/oil volume ratio for the continuous reaction in microreactor were 10 min, 0.1 g g−1, and 3:1, respectively. The analysis of variance (ANOVA) showed that the obtained reduced quadratic model was adequate for experimental results fitting. The reaction in the microreactor was significantly intensified compared to a conventional batch reactor, as seen through the fatty acid methyl esters (FAMEs) content after 10 min, which was 51.2% and 18.6%, respectively.",
publisher = "MDPI",
journal = "Micromachines",
title = "Transesterification of Sunflower Oil Over Waste Chicken Eggshell-Based Catalyst in a Microreactor: An Optimization Study",
volume = "12",
number = "2",
pages = "120",
doi = "10.3390/mi12020120"
}

Pavlović, S., Šelo, G., Marinković, D., Planinić, M., Tišma, M.,& Stanković, M.. (2021). Transesterification of Sunflower Oil Over Waste Chicken Eggshell-Based Catalyst in a Microreactor: An Optimization Study. in Micromachines
MDPI., 12(2), 120.
https://doi.org/10.3390/mi12020120

Pavlović S, Šelo G, Marinković D, Planinić M, Tišma M, Stanković M. Transesterification of Sunflower Oil Over Waste Chicken Eggshell-Based Catalyst in a Microreactor: An Optimization Study. in Micromachines. 2021;12(2):120.
doi:10.3390/mi12020120 .

Pavlović, Stefan, Šelo, Gordana, Marinković, Dalibor, Planinić, Mirela, Tišma, Marina, Stanković, Miroslav, "Transesterification of Sunflower Oil Over Waste Chicken Eggshell-Based Catalyst in a Microreactor: An Optimization Study" in Micromachines, 12, no. 2 (2021):120,
https://doi.org/10.3390/mi12020120 . .

TY  - JOUR
AU  - Dodevski, Vladimir
AU  - Janković, Bojan
AU  - Radović, Ivana
AU  - Stojmenović, Marija
AU  - Čebela, Maria
AU  - Nikolić, Željka
AU  - Pagnacco, Maja
AU  - Panić, Ivan
AU  - Stanković, Miroslav
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3230
AB  - In this work, plane tree seed-based activated carbons were characterized in detail for a variety of applications. The particularly important area of application would be in the artificial photosynthesis. After carbonization process of biomass precursor at 650°C, the resulting preliminary activated carbons were activated at various temperatures. The activated carbons were characterized by oxygen functionalities (a particularly important role has ester oxygen groups) which provide a unique microstructure. The chemical compositions of as-prepared activated carbons were analyzed through Fourier transform infrared and Raman spectra as well as gas chromatography–mass spectroscopy analysis, while morphology was observed by scanning electron microscopy analysis. Applied analysis showed that detected graphite mainly becomes uniformly nanocrystalline system. The current study also explored the applicability of carbon material obtained from plane tree seed as a potential gaseous adsorbent. The characterization showed that the tested material contains both mesopores and micropores, and this should be advantageous for the gas sorption process, since mesopores may provide low-resistant pathways for the diffusion of CO2 molecules, while the micropores are the most suitable for trapping of CO2. The sorption process analysis (including adsorption/desorption isotherms behavior) shows indication that the rate-limiting step of CO2 adsorption onto activated carbon is probably governed by diffusion-controlled process, especially at temperatures below 850°C.
PB  - SAGE Publications
T2  - Energy & Environment
T1  - Characterization analysis of activated carbon derived from the carbonization process of plane tree (Platanus orientalis) seeds
VL  - 31
IS  - 4
SP  - 583
EP  - 612
DO  - 10.1177/0958305X19880878
ER  - 

@article{
author = "Dodevski, Vladimir and Janković, Bojan and Radović, Ivana and Stojmenović, Marija and Čebela, Maria and Nikolić, Željka and Pagnacco, Maja and Panić, Ivan and Stanković, Miroslav",
year = "2020",
abstract = "In this work, plane tree seed-based activated carbons were characterized in detail for a variety of applications. The particularly important area of application would be in the artificial photosynthesis. After carbonization process of biomass precursor at 650°C, the resulting preliminary activated carbons were activated at various temperatures. The activated carbons were characterized by oxygen functionalities (a particularly important role has ester oxygen groups) which provide a unique microstructure. The chemical compositions of as-prepared activated carbons were analyzed through Fourier transform infrared and Raman spectra as well as gas chromatography–mass spectroscopy analysis, while morphology was observed by scanning electron microscopy analysis. Applied analysis showed that detected graphite mainly becomes uniformly nanocrystalline system. The current study also explored the applicability of carbon material obtained from plane tree seed as a potential gaseous adsorbent. The characterization showed that the tested material contains both mesopores and micropores, and this should be advantageous for the gas sorption process, since mesopores may provide low-resistant pathways for the diffusion of CO2 molecules, while the micropores are the most suitable for trapping of CO2. The sorption process analysis (including adsorption/desorption isotherms behavior) shows indication that the rate-limiting step of CO2 adsorption onto activated carbon is probably governed by diffusion-controlled process, especially at temperatures below 850°C.",
publisher = "SAGE Publications",
journal = "Energy & Environment",
title = "Characterization analysis of activated carbon derived from the carbonization process of plane tree (Platanus orientalis) seeds",
volume = "31",
number = "4",
pages = "583-612",
doi = "10.1177/0958305X19880878"
}

Dodevski, V., Janković, B., Radović, I., Stojmenović, M., Čebela, M., Nikolić, Ž., Pagnacco, M., Panić, I.,& Stanković, M.. (2020). Characterization analysis of activated carbon derived from the carbonization process of plane tree (Platanus orientalis) seeds. in Energy & Environment
SAGE Publications., 31(4), 583-612.
https://doi.org/10.1177/0958305X19880878

Dodevski V, Janković B, Radović I, Stojmenović M, Čebela M, Nikolić Ž, Pagnacco M, Panić I, Stanković M. Characterization analysis of activated carbon derived from the carbonization process of plane tree (Platanus orientalis) seeds. in Energy & Environment. 2020;31(4):583-612.
doi:10.1177/0958305X19880878 .

Dodevski, Vladimir, Janković, Bojan, Radović, Ivana, Stojmenović, Marija, Čebela, Maria, Nikolić, Željka, Pagnacco, Maja, Panić, Ivan, Stanković, Miroslav, "Characterization analysis of activated carbon derived from the carbonization process of plane tree (Platanus orientalis) seeds" in Energy & Environment, 31, no. 4 (2020):583-612,
https://doi.org/10.1177/0958305X19880878 . .

TY  - CONF
AU  - Pavlović, Stefan
AU  - Marinković, Dalibor
AU  - Stanković, Miroslav
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4877
AB  - Lignite coal fly ash collected from Serbian thermal power plants was converted into value-added zeolite-like material using a Teflon-lined hydrothermal reactor in an alkali activation process at 150 ºC for 24 h. The obtained material was used in the synthesis of zeolite supported chicken eggshell calcium oxide catalyst for biodiesel synthesis from waste cooking oil using earlier established procedures. The study aimed to coupled optimization of catalyst synthesis parameters (CaO loading and calcination temperature) and biodiesel synthesis process (CaO concentration in the reaction mixture). The influence of calcination temperature in the catalyst activation stage was monitored by X-ray diffraction and FT-IR spectroscopy, whereas the reaction progress by the HPLC analysis. The analyzed calcination temperature range was within 450 ºC and 950 ºC, CaO loading in the range of 10 wt% - 50 wt%, whereas CaO concentration in the reaction mixture was within 2 wt% and 10 wt%. It is shown that calcination temperature strongly influences the final catalyst form, whereby the temperature higher than 700 ºC leads to the destruction of the initial zeolitic support and interaction of CaO with the melted glassy silicate phase making less-active or non-active calcium silicate phases. The highest fatty acid methyl esters content (>97 wt.%) was obtained using a catalyst with 44 wt.% of CaO and calcined at 523 ºC under the following reaction conditions, reaction temperature of 60 ºC, methanol to oil molar ratio of 1/12, catalyst concentration of 8.8 wt.%, and reaction time of 90 min.
PB  - Belgrade : Materials Research Society of Serbia
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Programme and Book of Abstracts - Nineteenth Young Researchers' Conference, Materials Science and Engineering
T1  - Optimization of biodiesel production from waste cooking oil using waste-based CaO/Zeolite catalyst
SP  - 18
EP  - 18
UR  - https://hdl.handle.net/21.15107/rcub_cer_4877
ER  - 

@conference{
author = "Pavlović, Stefan and Marinković, Dalibor and Stanković, Miroslav",
year = "2020",
abstract = "Lignite coal fly ash collected from Serbian thermal power plants was converted into value-added zeolite-like material using a Teflon-lined hydrothermal reactor in an alkali activation process at 150 ºC for 24 h. The obtained material was used in the synthesis of zeolite supported chicken eggshell calcium oxide catalyst for biodiesel synthesis from waste cooking oil using earlier established procedures. The study aimed to coupled optimization of catalyst synthesis parameters (CaO loading and calcination temperature) and biodiesel synthesis process (CaO concentration in the reaction mixture). The influence of calcination temperature in the catalyst activation stage was monitored by X-ray diffraction and FT-IR spectroscopy, whereas the reaction progress by the HPLC analysis. The analyzed calcination temperature range was within 450 ºC and 950 ºC, CaO loading in the range of 10 wt% - 50 wt%, whereas CaO concentration in the reaction mixture was within 2 wt% and 10 wt%. It is shown that calcination temperature strongly influences the final catalyst form, whereby the temperature higher than 700 ºC leads to the destruction of the initial zeolitic support and interaction of CaO with the melted glassy silicate phase making less-active or non-active calcium silicate phases. The highest fatty acid methyl esters content (>97 wt.%) was obtained using a catalyst with 44 wt.% of CaO and calcined at 523 ºC under the following reaction conditions, reaction temperature of 60 ºC, methanol to oil molar ratio of 1/12, catalyst concentration of 8.8 wt.%, and reaction time of 90 min.",
publisher = "Belgrade : Materials Research Society of Serbia, Belgrade : Institute of Technical Sciences of SASA",
journal = "Programme and Book of Abstracts - Nineteenth Young Researchers' Conference, Materials Science and Engineering",
title = "Optimization of biodiesel production from waste cooking oil using waste-based CaO/Zeolite catalyst",
pages = "18-18",
url = "https://hdl.handle.net/21.15107/rcub_cer_4877"
}

Pavlović, S., Marinković, D.,& Stanković, M.. (2020). Optimization of biodiesel production from waste cooking oil using waste-based CaO/Zeolite catalyst. in Programme and Book of Abstracts - Nineteenth Young Researchers' Conference, Materials Science and Engineering
Belgrade : Materials Research Society of Serbia., 18-18.
https://hdl.handle.net/21.15107/rcub_cer_4877

Pavlović S, Marinković D, Stanković M. Optimization of biodiesel production from waste cooking oil using waste-based CaO/Zeolite catalyst. in Programme and Book of Abstracts - Nineteenth Young Researchers' Conference, Materials Science and Engineering. 2020;:18-18.
https://hdl.handle.net/21.15107/rcub_cer_4877 .

Pavlović, Stefan, Marinković, Dalibor, Stanković, Miroslav, "Optimization of biodiesel production from waste cooking oil using waste-based CaO/Zeolite catalyst" in Programme and Book of Abstracts - Nineteenth Young Researchers' Conference, Materials Science and Engineering (2020):18-18,
https://hdl.handle.net/21.15107/rcub_cer_4877 .

TY  - JOUR
AU  - Pavlović, Stefan
AU  - Marinković, Dalibor
AU  - Kostić, Milan
AU  - Janković-Častvan, Ivona
AU  - Mojović, Ljiljana
AU  - Stanković, Miroslav
AU  - Veljković, Vlada B.
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3423
AB  - The present paper is focused on the development of a new environment-friendly methanolysis catalyst completely
based on waste materials: lignite coal fly ash and chicken eggshells. A novel catalyst based on CaO
supported on a fly ash-based zeolitic material (CaO/FA-ZM) was obtained from a cancrinite-sodalite group
zeolite-like material (vishnevite type) and active CaO by alkali activation in a new miniature autoclave reactor
system and hydration-dehydration. Agitation by rotation of the entire reaction mixture led to a more homogeneous
zeolitic product and saved both time and energy. The obtained catalyst structure corresponds to gismondine
and the crystallographic modification of calcium silicate (α’-dicalcium silicate) with deposited CaO.
The characteristics of the synthesized catalyst were determined using ED-XRF, XRD, FT-IR, SEM, Hg-porosimetry,
N2-physisorption, LDPSA, and Hammett indicators. The CaO/FA-ZM catalyst exhibited a high activity
(97.8% of FAME for only 30 min) and stability (a negligible drop in activity in five consecutive cycles) in the
methanolysis reaction under the optimal reaction conditions (temperature of 60 °C, methanol/oil molar ratio of
6:1, and catalyst concentration of 6 wt%). A kinetic study was performed using two different mechanisms: the
irreversible pseudo-first-order reaction mechanism in two regimes (heterogeneous and homogeneous) and the
changing mechanism combined with the triacylglycerol mass transfer limitation. Both models showed a satisfactory
agreement between the experimental and predicted values of conversion degree (R2 > 0.93), confirming
their validity for the CaO-based heterogeneously catalyzed methanolysis. The values of the activation
energy calculated for both mechanisms were 67.17 and 58.03 kJ mol−1, respectively.
PB  - Elsevier
T2  - Fuel
T1  - A CaO/zeolite-based catalyst obtained from waste chicken eggshell and coal fly ash for biodiesel production
VL  - 267
SP  - 117171
DO  - 10.1016/j.fuel.2020.117171
ER  - 

@article{
author = "Pavlović, Stefan and Marinković, Dalibor and Kostić, Milan and Janković-Častvan, Ivona and Mojović, Ljiljana and Stanković, Miroslav and Veljković, Vlada B.",
year = "2020",
abstract = "The present paper is focused on the development of a new environment-friendly methanolysis catalyst completely
based on waste materials: lignite coal fly ash and chicken eggshells. A novel catalyst based on CaO
supported on a fly ash-based zeolitic material (CaO/FA-ZM) was obtained from a cancrinite-sodalite group
zeolite-like material (vishnevite type) and active CaO by alkali activation in a new miniature autoclave reactor
system and hydration-dehydration. Agitation by rotation of the entire reaction mixture led to a more homogeneous
zeolitic product and saved both time and energy. The obtained catalyst structure corresponds to gismondine
and the crystallographic modification of calcium silicate (α’-dicalcium silicate) with deposited CaO.
The characteristics of the synthesized catalyst were determined using ED-XRF, XRD, FT-IR, SEM, Hg-porosimetry,
N2-physisorption, LDPSA, and Hammett indicators. The CaO/FA-ZM catalyst exhibited a high activity
(97.8% of FAME for only 30 min) and stability (a negligible drop in activity in five consecutive cycles) in the
methanolysis reaction under the optimal reaction conditions (temperature of 60 °C, methanol/oil molar ratio of
6:1, and catalyst concentration of 6 wt%). A kinetic study was performed using two different mechanisms: the
irreversible pseudo-first-order reaction mechanism in two regimes (heterogeneous and homogeneous) and the
changing mechanism combined with the triacylglycerol mass transfer limitation. Both models showed a satisfactory
agreement between the experimental and predicted values of conversion degree (R2 > 0.93), confirming
their validity for the CaO-based heterogeneously catalyzed methanolysis. The values of the activation
energy calculated for both mechanisms were 67.17 and 58.03 kJ mol−1, respectively.",
publisher = "Elsevier",
journal = "Fuel",
title = "A CaO/zeolite-based catalyst obtained from waste chicken eggshell and coal fly ash for biodiesel production",
volume = "267",
pages = "117171",
doi = "10.1016/j.fuel.2020.117171"
}

Pavlović, S., Marinković, D., Kostić, M., Janković-Častvan, I., Mojović, L., Stanković, M.,& Veljković, V. B.. (2020). A CaO/zeolite-based catalyst obtained from waste chicken eggshell and coal fly ash for biodiesel production. in Fuel
Elsevier., 267, 117171.
https://doi.org/10.1016/j.fuel.2020.117171

Pavlović S, Marinković D, Kostić M, Janković-Častvan I, Mojović L, Stanković M, Veljković VB. A CaO/zeolite-based catalyst obtained from waste chicken eggshell and coal fly ash for biodiesel production. in Fuel. 2020;267:117171.
doi:10.1016/j.fuel.2020.117171 .

Pavlović, Stefan, Marinković, Dalibor, Kostić, Milan, Janković-Častvan, Ivona, Mojović, Ljiljana, Stanković, Miroslav, Veljković, Vlada B., "A CaO/zeolite-based catalyst obtained from waste chicken eggshell and coal fly ash for biodiesel production" in Fuel, 267 (2020):117171,
https://doi.org/10.1016/j.fuel.2020.117171 . .

TY  - CHAP
AU  - Stanković, Miroslav
AU  - Pavlović, Stefan
AU  - Marinković, Dalibor
AU  - Tišma, Marina
AU  - Gabrovska, Margarita
AU  - Nikolova, Dimitrinka
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3743
AB  - Coal fly ash (CFA) is generated during the combustion of coal for energy production. Many studies are based on its utilization as the most abundant, cheap
aluminosilicate industrial residue, which is recognized as a risk for the environment and human health. The present review is focused on CFA origin, chemical properties, and its catalytic application for biodiesel production. The aluminosilicate nature and the presence of rare earth elements make CFA suitable for different adsorption, catalytic, and extraction processes for obtaining valuable products including alternative fuels and pure elements. However, the presence of toxic elements is a potential environmental problem, which should be solved in order to avoid soil, water, and air pollution. The most used modification methods are alkali activation, hydrothermal, and thermal treatment that improve the structural, morphological, and textural properties. The active catalytic form could be obtained by impregnation or ion exchange method. It was found that such synthesized materials have significant catalytic potential in the biofuel chemistry. In the case of biodiesel production, the high values of conversion or yield can be achieved under mild low-energy reaction conditions in the presence of low-cost waste-based catalysts.
PB  - IntechOpen
T2  - Renewable Energy – Resources, Challenges and Applications
T1  - Solid green biodiesel catalysts derived from coal fly ash
SP  - 185
EP  - 208
DO  - 10.5772/intechopen.91703
ER  - 

@inbook{
author = "Stanković, Miroslav and Pavlović, Stefan and Marinković, Dalibor and Tišma, Marina and Gabrovska, Margarita and Nikolova, Dimitrinka",
year = "2020",
abstract = "Coal fly ash (CFA) is generated during the combustion of coal for energy production. Many studies are based on its utilization as the most abundant, cheap
aluminosilicate industrial residue, which is recognized as a risk for the environment and human health. The present review is focused on CFA origin, chemical properties, and its catalytic application for biodiesel production. The aluminosilicate nature and the presence of rare earth elements make CFA suitable for different adsorption, catalytic, and extraction processes for obtaining valuable products including alternative fuels and pure elements. However, the presence of toxic elements is a potential environmental problem, which should be solved in order to avoid soil, water, and air pollution. The most used modification methods are alkali activation, hydrothermal, and thermal treatment that improve the structural, morphological, and textural properties. The active catalytic form could be obtained by impregnation or ion exchange method. It was found that such synthesized materials have significant catalytic potential in the biofuel chemistry. In the case of biodiesel production, the high values of conversion or yield can be achieved under mild low-energy reaction conditions in the presence of low-cost waste-based catalysts.",
publisher = "IntechOpen",
journal = "Renewable Energy – Resources, Challenges and Applications",
booktitle = "Solid green biodiesel catalysts derived from coal fly ash",
pages = "185-208",
doi = "10.5772/intechopen.91703"
}

Stanković, M., Pavlović, S., Marinković, D., Tišma, M., Gabrovska, M.,& Nikolova, D.. (2020). Solid green biodiesel catalysts derived from coal fly ash. in Renewable Energy – Resources, Challenges and Applications
IntechOpen., 185-208.
https://doi.org/10.5772/intechopen.91703

Stanković M, Pavlović S, Marinković D, Tišma M, Gabrovska M, Nikolova D. Solid green biodiesel catalysts derived from coal fly ash. in Renewable Energy – Resources, Challenges and Applications. 2020;:185-208.
doi:10.5772/intechopen.91703 .

Stanković, Miroslav, Pavlović, Stefan, Marinković, Dalibor, Tišma, Marina, Gabrovska, Margarita, Nikolova, Dimitrinka, "Solid green biodiesel catalysts derived from coal fly ash" in Renewable Energy – Resources, Challenges and Applications (2020):185-208,
https://doi.org/10.5772/intechopen.91703 . .

TY  - CONF
AU  - Pavlović, Stefan
AU  - Marinković, Dalibor
AU  - Tišma, Marina
AU  - Stanković, Miroslav
PY  - 2020
UR  - https://www.fuelcenter.rwth-aachen.de/cms/Fuelcenter/Austausch/Internationale-Konferenz/~dcsks/8-Internationale-Konferenz/lidx/1/
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3744
AB  - Calcium oxide was derived from chicken eggshell (ES) by calcination at 900 °C. To improve catalyst performance, the catalyst was treated by the hydration-dehydration method. The new catalyst, with improved structural and morphological properties, denoted as ESHC-600, was obtained and used in methanolysis reaction. Methanolysis reaction was carried out in a microreactor system equipped with two microfluidic syringe pumps. ESHC-600 catalyst was suspended in sunflower oil and added in the first syringe, whereas methanol was placed in the second one. Microchannel with an internal diameter of 0.6 mm was connected with syringes by a T-shaped three-way junction and immersed in the thermostated water bath (60 °C). The reaction parameters are optimized in the following range: catalyst concentration (0.05, 0.075, and 0.1 g/g), methanol to oil volume ratio (1:2, 2:1, and 3:1) and residence time (4, 7, and 10 min). Design of the experiment was created according to three-level full functional design. The response variable was FAME content, which was determined by the HPLC method. It can be noted, that the catalyst exhibits satisfactory catalytic activity in such specific reactor systems in which two immiscible liquids and a solid catalyst interact at a micro-level. Namely, each segment represents one microreactor, thus achieving enhanced miscibility with suppressing external diffusion limitations. Determined optimal reaction conditions were: catalyst concentration of 10 wt%, methanol to oil volume ratio of 3:1, and residence time of 10 min. FAME content in microreactor (54.8 % FAME) was 5 times higher compared with the reaction in a batch reactor (10.3 % FAME) under optimal conditions. Also, it is important to note that potential problem in such microreactor systems represents catalyst precipitation in the syringe, which is particularly pronounced at longer residence time. Such behavior of the catalyst leads to a decline of catalytic activity due to non-uniformly catalyst concentration during the reaction, which can be overcome by pre-treatment of the catalyst-oil suspension under ultrasonic conditions. According to obtained results, such designed reaction systems can be used in biodiesel production in a large scale using sustainable, green, and energy-efficient processes, whereby productivity would be increased by connecting more of these reactors in series.
PB  - Cluster of Excellence The Fuel Science Center
T1  - Optimization of heterogeneously catalyzed methanolysis in microreactor using a green eggshell catalyst
UR  - https://hdl.handle.net/21.15107/rcub_cer_3744
ER  - 

@conference{
author = "Pavlović, Stefan and Marinković, Dalibor and Tišma, Marina and Stanković, Miroslav",
year = "2020",
abstract = "Calcium oxide was derived from chicken eggshell (ES) by calcination at 900 °C. To improve catalyst performance, the catalyst was treated by the hydration-dehydration method. The new catalyst, with improved structural and morphological properties, denoted as ESHC-600, was obtained and used in methanolysis reaction. Methanolysis reaction was carried out in a microreactor system equipped with two microfluidic syringe pumps. ESHC-600 catalyst was suspended in sunflower oil and added in the first syringe, whereas methanol was placed in the second one. Microchannel with an internal diameter of 0.6 mm was connected with syringes by a T-shaped three-way junction and immersed in the thermostated water bath (60 °C). The reaction parameters are optimized in the following range: catalyst concentration (0.05, 0.075, and 0.1 g/g), methanol to oil volume ratio (1:2, 2:1, and 3:1) and residence time (4, 7, and 10 min). Design of the experiment was created according to three-level full functional design. The response variable was FAME content, which was determined by the HPLC method. It can be noted, that the catalyst exhibits satisfactory catalytic activity in such specific reactor systems in which two immiscible liquids and a solid catalyst interact at a micro-level. Namely, each segment represents one microreactor, thus achieving enhanced miscibility with suppressing external diffusion limitations. Determined optimal reaction conditions were: catalyst concentration of 10 wt%, methanol to oil volume ratio of 3:1, and residence time of 10 min. FAME content in microreactor (54.8 % FAME) was 5 times higher compared with the reaction in a batch reactor (10.3 % FAME) under optimal conditions. Also, it is important to note that potential problem in such microreactor systems represents catalyst precipitation in the syringe, which is particularly pronounced at longer residence time. Such behavior of the catalyst leads to a decline of catalytic activity due to non-uniformly catalyst concentration during the reaction, which can be overcome by pre-treatment of the catalyst-oil suspension under ultrasonic conditions. According to obtained results, such designed reaction systems can be used in biodiesel production in a large scale using sustainable, green, and energy-efficient processes, whereby productivity would be increased by connecting more of these reactors in series.",
publisher = "Cluster of Excellence The Fuel Science Center",
title = "Optimization of heterogeneously catalyzed methanolysis in microreactor using a green eggshell catalyst",
url = "https://hdl.handle.net/21.15107/rcub_cer_3744"
}

Pavlović, S., Marinković, D., Tišma, M.,& Stanković, M.. (2020). Optimization of heterogeneously catalyzed methanolysis in microreactor using a green eggshell catalyst. 
Cluster of Excellence The Fuel Science Center..
https://hdl.handle.net/21.15107/rcub_cer_3744

Pavlović S, Marinković D, Tišma M, Stanković M. Optimization of heterogeneously catalyzed methanolysis in microreactor using a green eggshell catalyst. 2020;.
https://hdl.handle.net/21.15107/rcub_cer_3744 .

Pavlović, Stefan, Marinković, Dalibor, Tišma, Marina, Stanković, Miroslav, "Optimization of heterogeneously catalyzed methanolysis in microreactor using a green eggshell catalyst" (2020),
https://hdl.handle.net/21.15107/rcub_cer_3744 .

TY  - JOUR
AU  - Kokunešoski, Maja
AU  - Stanković, Miroslav
AU  - Vuković, Marina
AU  - Majstorović, Jelena
AU  - Šaponjić, Djordje
AU  - Ilić, Svetlana
AU  - Šaponjić, Aleksandra
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4047
AB  - Macroporous silica ceramic was obtained using clay and diatomite. Boric acid as a low-cost additive in the amount of 1 wt% was used. These porous materials were obtained at low forming pressure (40-80 MPa) and lower sintering temperature (850-1300 ºC) for 4h in air. The influence of boric acid, forming pressure, and sintering temperature on the microstructure, porosity parameters, and mechanical properties of obtained porous monoliths were investigated. As-received and the modified samples were characterized by X-ray diffraction, FTIR, SEM, and mercury porosimetry measurements. As for modified clay and diatomite, they were pressed at 60 MPa and then sintered at 1150 ºC, obtaining porosities of about 10 % and 60 %, respectively. Both of the analyzed samples had the pore diameter in the range of macroporous materials. The pore diameters of clay samples are ranging from 0.1-10 μm, whereas the pore diameter of diatomite samples was slightly lower with values ranging from 0.05-5 μm. Modified diatomite samples have a lower Young modulus in comparison to modified clay samples.
PB  - Belgrade : Association for ETRAN Society
T2  - Science of Sintering
T1  - Macroporous monoliths based оn natural mineral sources, clay аnd diatomite
VL  - 52
IS  - 3
SP  - 339
EP  - 348
DO  - 10.2298/SOS2003339K
ER  - 

@article{
author = "Kokunešoski, Maja and Stanković, Miroslav and Vuković, Marina and Majstorović, Jelena and Šaponjić, Djordje and Ilić, Svetlana and Šaponjić, Aleksandra",
year = "2020",
abstract = "Macroporous silica ceramic was obtained using clay and diatomite. Boric acid as a low-cost additive in the amount of 1 wt% was used. These porous materials were obtained at low forming pressure (40-80 MPa) and lower sintering temperature (850-1300 ºC) for 4h in air. The influence of boric acid, forming pressure, and sintering temperature on the microstructure, porosity parameters, and mechanical properties of obtained porous monoliths were investigated. As-received and the modified samples were characterized by X-ray diffraction, FTIR, SEM, and mercury porosimetry measurements. As for modified clay and diatomite, they were pressed at 60 MPa and then sintered at 1150 ºC, obtaining porosities of about 10 % and 60 %, respectively. Both of the analyzed samples had the pore diameter in the range of macroporous materials. The pore diameters of clay samples are ranging from 0.1-10 μm, whereas the pore diameter of diatomite samples was slightly lower with values ranging from 0.05-5 μm. Modified diatomite samples have a lower Young modulus in comparison to modified clay samples.",
publisher = "Belgrade : Association for ETRAN Society",
journal = "Science of Sintering",
title = "Macroporous monoliths based оn natural mineral sources, clay аnd diatomite",
volume = "52",
number = "3",
pages = "339-348",
doi = "10.2298/SOS2003339K"
}

Kokunešoski, M., Stanković, M., Vuković, M., Majstorović, J., Šaponjić, D., Ilić, S.,& Šaponjić, A.. (2020). Macroporous monoliths based оn natural mineral sources, clay аnd diatomite. in Science of Sintering
Belgrade : Association for ETRAN Society., 52(3), 339-348.
https://doi.org/10.2298/SOS2003339K

Kokunešoski M, Stanković M, Vuković M, Majstorović J, Šaponjić D, Ilić S, Šaponjić A. Macroporous monoliths based оn natural mineral sources, clay аnd diatomite. in Science of Sintering. 2020;52(3):339-348.
doi:10.2298/SOS2003339K .

Kokunešoski, Maja, Stanković, Miroslav, Vuković, Marina, Majstorović, Jelena, Šaponjić, Djordje, Ilić, Svetlana, Šaponjić, Aleksandra, "Macroporous monoliths based оn natural mineral sources, clay аnd diatomite" in Science of Sintering, 52, no. 3 (2020):339-348,
https://doi.org/10.2298/SOS2003339K . .

TY  - CONF
AU  - Pavlović, Stefan
AU  - Marinković, Dalibor
AU  - Milovanović, Biljana
AU  - Kostić, Milan
AU  - Gabrovska, Margarita
AU  - Nikolova, Dimitrinka
AU  - Stanković, Miroslav
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3434
AB  - Eggshell based catalysts were synthesized by calcination (600 and 900 ºC, 4 h) of raw and rehydration (RH) modified (RH-temperature of 80 ºC, S/L ratio of 1/5, and RH-time of 6 h) eggshell. After RH-treatment, the sample underwent calcination at 600 ºC, 4 h. Obtained catalysts were characterized by XRD, SEM, N2-physisorption, and Hg-porosimetry, whereas the catalytic activity was analyzed in a batch reactor (reaction temperature of 60 ºC, sunflower oil/methanol molar ratio of 1/12, and catalyst concentration of 4 wt.%). The concentration of fatty acid methyl esters (FAMEs) was determined by HPLC. The reaction has reached equilibrium (FAME > 97%) with rehydrated catalyst for 1.5 h, whereas with catalyst calcined at 900 ºC for 4 h.
PB  - DECHEMA e.V.
C3  - 14th EuropaCat – European Congress on Catalysis “Catalysis without Borders”
T1  - Effects of preparation conditions on the catalytic activity of chicken eggshell catalysts for the transesterification of oils to biodiesel
SP  - 643
EP  - 644
UR  - https://hdl.handle.net/21.15107/rcub_cer_3434
ER  - 

@conference{
author = "Pavlović, Stefan and Marinković, Dalibor and Milovanović, Biljana and Kostić, Milan and Gabrovska, Margarita and Nikolova, Dimitrinka and Stanković, Miroslav",
year = "2019",
abstract = "Eggshell based catalysts were synthesized by calcination (600 and 900 ºC, 4 h) of raw and rehydration (RH) modified (RH-temperature of 80 ºC, S/L ratio of 1/5, and RH-time of 6 h) eggshell. After RH-treatment, the sample underwent calcination at 600 ºC, 4 h. Obtained catalysts were characterized by XRD, SEM, N2-physisorption, and Hg-porosimetry, whereas the catalytic activity was analyzed in a batch reactor (reaction temperature of 60 ºC, sunflower oil/methanol molar ratio of 1/12, and catalyst concentration of 4 wt.%). The concentration of fatty acid methyl esters (FAMEs) was determined by HPLC. The reaction has reached equilibrium (FAME > 97%) with rehydrated catalyst for 1.5 h, whereas with catalyst calcined at 900 ºC for 4 h.",
publisher = "DECHEMA e.V.",
journal = "14th EuropaCat – European Congress on Catalysis “Catalysis without Borders”",
title = "Effects of preparation conditions on the catalytic activity of chicken eggshell catalysts for the transesterification of oils to biodiesel",
pages = "643-644",
url = "https://hdl.handle.net/21.15107/rcub_cer_3434"
}

Pavlović, S., Marinković, D., Milovanović, B., Kostić, M., Gabrovska, M., Nikolova, D.,& Stanković, M.. (2019). Effects of preparation conditions on the catalytic activity of chicken eggshell catalysts for the transesterification of oils to biodiesel. in 14th EuropaCat – European Congress on Catalysis “Catalysis without Borders”
DECHEMA e.V.., 643-644.
https://hdl.handle.net/21.15107/rcub_cer_3434

Pavlović S, Marinković D, Milovanović B, Kostić M, Gabrovska M, Nikolova D, Stanković M. Effects of preparation conditions on the catalytic activity of chicken eggshell catalysts for the transesterification of oils to biodiesel. in 14th EuropaCat – European Congress on Catalysis “Catalysis without Borders”. 2019;:643-644.
https://hdl.handle.net/21.15107/rcub_cer_3434 .

Pavlović, Stefan, Marinković, Dalibor, Milovanović, Biljana, Kostić, Milan, Gabrovska, Margarita, Nikolova, Dimitrinka, Stanković, Miroslav, "Effects of preparation conditions on the catalytic activity of chicken eggshell catalysts for the transesterification of oils to biodiesel" in 14th EuropaCat – European Congress on Catalysis “Catalysis without Borders” (2019):643-644,
https://hdl.handle.net/21.15107/rcub_cer_3434 .

TY  - CONF
AU  - Pavlović, Stefan
AU  - Banković, Predrag
AU  - Marinković, Dalibor
AU  - Stanković, Miroslav
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3397
AB  - This paper discloses the synthesis of new supported catalyst in which the main components of the catalyst, catalyst support and active component, derived from waste material, and its catalytic properties tested in the reaction of the production of biodiesel. Cancrinite-type zeolite catalyst support was synthesized from coal fly ash using hydrothermal technique with NaOH as the activation reagent in a rotating PTFE autoclave reactor. The active component, CaO, was derived from waste chicken eggshells by calcination at 900 °C. Supported catalytic material was synthesized by impregnation. The content of CaO in the prepared catalysts was varied from 5 to 20 wt%. The catalysts were characterized using XRD, FT-IR, SEM, N2-physisorption, and Hg-porosimetry. The methanolysis of sunflower oil was carried out in a batch reactor at 60 °C, with
methanol to oil molar ratio of 12:1, and catalyst concentration of 4 wt.%. The fatty acid methyl ester content (% FAME) was analyzed using HPLC method. Structural information related to phase identification and vibration of chemical bonds in molecular units indicates that a multiphase zeolitic structure was obtained. The structure of cancrinite-type zeolite was found to be dominantly present. It was found that the catalyst impregnated with 20% of CaO gave the highest FAME percentage of 96.46 for the reaction time of 2 h.
PB  - Serbian Ceramic Society
C3  - Serbian Ceramic Society Conference, ADVANCED CERAMICS AND APPLICATION VIII, New Frontiers in Multifunctional Material Science and Processing
T1  - Calcium oxide on coal fly ash cancrinite-type zeolite as a catalyst for biodiesel production
SP  - 43
UR  - https://hdl.handle.net/21.15107/rcub_cer_3397
ER  - 

@conference{
author = "Pavlović, Stefan and Banković, Predrag and Marinković, Dalibor and Stanković, Miroslav",
year = "2019",
abstract = "This paper discloses the synthesis of new supported catalyst in which the main components of the catalyst, catalyst support and active component, derived from waste material, and its catalytic properties tested in the reaction of the production of biodiesel. Cancrinite-type zeolite catalyst support was synthesized from coal fly ash using hydrothermal technique with NaOH as the activation reagent in a rotating PTFE autoclave reactor. The active component, CaO, was derived from waste chicken eggshells by calcination at 900 °C. Supported catalytic material was synthesized by impregnation. The content of CaO in the prepared catalysts was varied from 5 to 20 wt%. The catalysts were characterized using XRD, FT-IR, SEM, N2-physisorption, and Hg-porosimetry. The methanolysis of sunflower oil was carried out in a batch reactor at 60 °C, with
methanol to oil molar ratio of 12:1, and catalyst concentration of 4 wt.%. The fatty acid methyl ester content (% FAME) was analyzed using HPLC method. Structural information related to phase identification and vibration of chemical bonds in molecular units indicates that a multiphase zeolitic structure was obtained. The structure of cancrinite-type zeolite was found to be dominantly present. It was found that the catalyst impregnated with 20% of CaO gave the highest FAME percentage of 96.46 for the reaction time of 2 h.",
publisher = "Serbian Ceramic Society",
journal = "Serbian Ceramic Society Conference, ADVANCED CERAMICS AND APPLICATION VIII, New Frontiers in Multifunctional Material Science and Processing",
title = "Calcium oxide on coal fly ash cancrinite-type zeolite as a catalyst for biodiesel production",
pages = "43",
url = "https://hdl.handle.net/21.15107/rcub_cer_3397"
}

Pavlović, S., Banković, P., Marinković, D.,& Stanković, M.. (2019). Calcium oxide on coal fly ash cancrinite-type zeolite as a catalyst for biodiesel production. in Serbian Ceramic Society Conference, ADVANCED CERAMICS AND APPLICATION VIII, New Frontiers in Multifunctional Material Science and Processing
Serbian Ceramic Society., 43.
https://hdl.handle.net/21.15107/rcub_cer_3397

Pavlović S, Banković P, Marinković D, Stanković M. Calcium oxide on coal fly ash cancrinite-type zeolite as a catalyst for biodiesel production. in Serbian Ceramic Society Conference, ADVANCED CERAMICS AND APPLICATION VIII, New Frontiers in Multifunctional Material Science and Processing. 2019;:43.
https://hdl.handle.net/21.15107/rcub_cer_3397 .

Pavlović, Stefan, Banković, Predrag, Marinković, Dalibor, Stanković, Miroslav, "Calcium oxide on coal fly ash cancrinite-type zeolite as a catalyst for biodiesel production" in Serbian Ceramic Society Conference, ADVANCED CERAMICS AND APPLICATION VIII, New Frontiers in Multifunctional Material Science and Processing (2019):43,
https://hdl.handle.net/21.15107/rcub_cer_3397 .

TY  - JOUR
AU  - Mladenović, Dragana
AU  - Djukić‐Vuković, Aleksandra
AU  - Stanković, Miroslav
AU  - Milašinović‐Šeremešić, Marija
AU  - Radosavljević, Milica
AU  - Pejin, Jelena
AU  - Mojović, Ljiljana
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3064
AB  - BACKGROUND: Growing challenges of resource depletion, food security and environmental protection are putting stress on the development of biorefinery processes for bioprocessing of residues fromfood and agro-industry into value-added products. In this study, the simultaneous production of lactic acid (LA) and livestock feed on a combined substrate based on molasses and potato stillage by Lactobacillus paracasei NRRL B-4564 immobilized onto sunflower seed hull (SSH), brewer’s spent grain (BSG) and sugar beet pulp (SBP) was studied. RESULTS: The highest total LA concentration of 399 g L−1 with overall productivity of 1.27 g L−1 h−1 was achieved in repeated batch fermentation by SBP-immobilized biocatalyst, followed by BSG- and SSH-immobilized cells. Fermentation improved the content of proteins and ash, and decreased the content of fibers in all three support materials. In addition, the fermentation had favorable effect on in vitro drymatter digestibility and energy values of SSH and BSG. According to assessment of probiotic potential, L. paracasei demonstrated a favorable probiotic profile, exhibiting high resistance to simulated ruminant digestive tract and significant antioxidant and antimicrobial activity. CONCLUSIONS: The proposed strategy enables valorization of agro-industrial residues as value-added ruminant feed and simultaneous LA production. Following principles of circular economy, the developed process combines different rawmaterials and integrates them into a biorefinery process, improving the overall profitability and productivity.
PB  - Wiley
T2  - Journal of the Science of Food and Agriculture
T1  - Bioprocessing of agro‐industrial residues into lactic acid and probiotic enriched livestock feed
VL  - 99
IS  - 12
SP  - 5293
EP  - 5302
DO  - 10.1002/jsfa.9759
ER  - 

@article{
author = "Mladenović, Dragana and Djukić‐Vuković, Aleksandra and Stanković, Miroslav and Milašinović‐Šeremešić, Marija and Radosavljević, Milica and Pejin, Jelena and Mojović, Ljiljana",
year = "2019",
abstract = "BACKGROUND: Growing challenges of resource depletion, food security and environmental protection are putting stress on the development of biorefinery processes for bioprocessing of residues fromfood and agro-industry into value-added products. In this study, the simultaneous production of lactic acid (LA) and livestock feed on a combined substrate based on molasses and potato stillage by Lactobacillus paracasei NRRL B-4564 immobilized onto sunflower seed hull (SSH), brewer’s spent grain (BSG) and sugar beet pulp (SBP) was studied. RESULTS: The highest total LA concentration of 399 g L−1 with overall productivity of 1.27 g L−1 h−1 was achieved in repeated batch fermentation by SBP-immobilized biocatalyst, followed by BSG- and SSH-immobilized cells. Fermentation improved the content of proteins and ash, and decreased the content of fibers in all three support materials. In addition, the fermentation had favorable effect on in vitro drymatter digestibility and energy values of SSH and BSG. According to assessment of probiotic potential, L. paracasei demonstrated a favorable probiotic profile, exhibiting high resistance to simulated ruminant digestive tract and significant antioxidant and antimicrobial activity. CONCLUSIONS: The proposed strategy enables valorization of agro-industrial residues as value-added ruminant feed and simultaneous LA production. Following principles of circular economy, the developed process combines different rawmaterials and integrates them into a biorefinery process, improving the overall profitability and productivity.",
publisher = "Wiley",
journal = "Journal of the Science of Food and Agriculture",
title = "Bioprocessing of agro‐industrial residues into lactic acid and probiotic enriched livestock feed",
volume = "99",
number = "12",
pages = "5293-5302",
doi = "10.1002/jsfa.9759"
}

Mladenović, D., Djukić‐Vuković, A., Stanković, M., Milašinović‐Šeremešić, M., Radosavljević, M., Pejin, J.,& Mojović, L.. (2019). Bioprocessing of agro‐industrial residues into lactic acid and probiotic enriched livestock feed. in Journal of the Science of Food and Agriculture
Wiley., 99(12), 5293-5302.
https://doi.org/10.1002/jsfa.9759

Mladenović D, Djukić‐Vuković A, Stanković M, Milašinović‐Šeremešić M, Radosavljević M, Pejin J, Mojović L. Bioprocessing of agro‐industrial residues into lactic acid and probiotic enriched livestock feed. in Journal of the Science of Food and Agriculture. 2019;99(12):5293-5302.
doi:10.1002/jsfa.9759 .

Mladenović, Dragana, Djukić‐Vuković, Aleksandra, Stanković, Miroslav, Milašinović‐Šeremešić, Marija, Radosavljević, Milica, Pejin, Jelena, Mojović, Ljiljana, "Bioprocessing of agro‐industrial residues into lactic acid and probiotic enriched livestock feed" in Journal of the Science of Food and Agriculture, 99, no. 12 (2019):5293-5302,
https://doi.org/10.1002/jsfa.9759 . .

TY  - CONF
AU  - Marinković, Dalibor
AU  - Pavlović, Stefan
AU  - Stanković, Miroslav
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2888
AB  - With the depletion of fossil fuels as a source for fuels and energy, the share of energy supplied by
renewable resources such as biomass can be expected to increase in the anticipated future.
Biodiesel, composed of fatty acid methyl esters (FAME), is one of the renewable alternative to
fosil fuels which is most common obtained in catalyzed transesterification reaction of
triacylglycerols (TAG). Naydays, the most promicing process is considered continuous basic
heterogeneously-catalyzed methanolysis of sustainable sources of TAG. Heterogeneouslycatalyzed
process has numerus advantages, but some drowbacks also exists. One of the main
concern is catalyst stability and durability. The aim of this study is catalyst durability
investigation and determination of the deactivation mechanisms on the case of CaO loaded onto
mesoporous neutral carrier. The experiments were carried out in continuous packed bed tubular
reactor (PBR) under mild reaction conditions. The CaO-based catalyst showed high activity in
continuos reaction conditions during the first 30 h of operation, the FAME content was higher
then 91.5%. After 30 h the catalyst activity began to decrease, so that after 36 h the FAME
content was only 36%. The analysis of the morphology and the present functional groups on the
surface of the catalyst before and after the reaction clearly showed a massive deposition of
organic molecules from the reaction mixture on the surface of the catalyst. Since the loss of the
active species by leaching was negligible, the sheltering of the catalytic active sites by such
massive deposition of the organic molecule resulted in a decrease in the activity of the used
CaO-based catalyst.
PB  - Faculty of Technology Zvornik
C3  - Proceedings of VI International Congress "Engineering, Environment and Materials in Processing Industry", Faculty of Technology Zvornik
T1  - Deactivation Aspects of Methanolysis Catalyst Based on CaO Loaded on Mesoporous Carrier
SP  - 59
EP  - 64
DO  - 10.7251/EEMEN1901059M
ER  - 

@conference{
author = "Marinković, Dalibor and Pavlović, Stefan and Stanković, Miroslav",
year = "2019",
abstract = "With the depletion of fossil fuels as a source for fuels and energy, the share of energy supplied by
renewable resources such as biomass can be expected to increase in the anticipated future.
Biodiesel, composed of fatty acid methyl esters (FAME), is one of the renewable alternative to
fosil fuels which is most common obtained in catalyzed transesterification reaction of
triacylglycerols (TAG). Naydays, the most promicing process is considered continuous basic
heterogeneously-catalyzed methanolysis of sustainable sources of TAG. Heterogeneouslycatalyzed
process has numerus advantages, but some drowbacks also exists. One of the main
concern is catalyst stability and durability. The aim of this study is catalyst durability
investigation and determination of the deactivation mechanisms on the case of CaO loaded onto
mesoporous neutral carrier. The experiments were carried out in continuous packed bed tubular
reactor (PBR) under mild reaction conditions. The CaO-based catalyst showed high activity in
continuos reaction conditions during the first 30 h of operation, the FAME content was higher
then 91.5%. After 30 h the catalyst activity began to decrease, so that after 36 h the FAME
content was only 36%. The analysis of the morphology and the present functional groups on the
surface of the catalyst before and after the reaction clearly showed a massive deposition of
organic molecules from the reaction mixture on the surface of the catalyst. Since the loss of the
active species by leaching was negligible, the sheltering of the catalytic active sites by such
massive deposition of the organic molecule resulted in a decrease in the activity of the used
CaO-based catalyst.",
publisher = "Faculty of Technology Zvornik",
journal = "Proceedings of VI International Congress "Engineering, Environment and Materials in Processing Industry", Faculty of Technology Zvornik",
title = "Deactivation Aspects of Methanolysis Catalyst Based on CaO Loaded on Mesoporous Carrier",
pages = "59-64",
doi = "10.7251/EEMEN1901059M"
}

Marinković, D., Pavlović, S.,& Stanković, M.. (2019). Deactivation Aspects of Methanolysis Catalyst Based on CaO Loaded on Mesoporous Carrier. in Proceedings of VI International Congress "Engineering, Environment and Materials in Processing Industry", Faculty of Technology Zvornik
Faculty of Technology Zvornik., 59-64.
https://doi.org/10.7251/EEMEN1901059M

Marinković D, Pavlović S, Stanković M. Deactivation Aspects of Methanolysis Catalyst Based on CaO Loaded on Mesoporous Carrier. in Proceedings of VI International Congress "Engineering, Environment and Materials in Processing Industry", Faculty of Technology Zvornik. 2019;:59-64.
doi:10.7251/EEMEN1901059M .

Marinković, Dalibor, Pavlović, Stefan, Stanković, Miroslav, "Deactivation Aspects of Methanolysis Catalyst Based on CaO Loaded on Mesoporous Carrier" in Proceedings of VI International Congress "Engineering, Environment and Materials in Processing Industry", Faculty of Technology Zvornik (2019):59-64,
https://doi.org/10.7251/EEMEN1901059M . .

TY  - CONF
AU  - Pečar, Darja
AU  - Mićić, Vladan
AU  - Pavlović, Stefan
AU  - Stanković, Miroslav
AU  - Goršek, Andreja
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3792
AB  - Naraščajoče povpraševanje po varnih industrijskih procesih je pripeljalo do razvoja in uporabe okolju prijaznih trdnih katalizatorjev, namenjenih za uporabo pri kislinsko kataliziranih reakcijah z dodano vrednostjo. Kislinska kataliza je eden najpogostejših procesov v kemični industriji. Industrijsko pomembne organske trasformacije vključujejo esterifikacije in transesterifikacije, eterifikacije, dehidracije, oksidacije, acetilacije, sililacije, sintezo biodizla [1,2]. Trdni kislinski katalizatorji, znani kot "zeleni katalizatorji", se uporabljajo kot nadomestek za homogene kislinske katalizatorje. Vsebujejo več okolju prijaznih komponent, hkrati pa zagotavljajo večjo aktivnost in selektivnost v primerjavi z obstoječimi homogenimi katalizatorji [3]. Primer heterogenega katalizatorja je mezoporozna silika - modificiran SBA-15, ki se uporablja za številne
organske reakcije. V tej študiji smo se osredotočili na sintezo trdnega kislinskega katalizatorja na osnovi mezoporoznega silike SBA-15 z inkorporiranim kovinskim Al. Z ujetjem kovine v silikatno matrico se katalizatorju izboljšata aktivnost in selektivnost, postane bolj temperaturno obstojen in pridobi večje možnosti za ponovno uporabo. Sintetiziran katalizator smo karakterizirali z adsorpcijo-desorpcijo dušika (BET), živosrebrno porozimetrijo, Fourierjevo transformacijsko infrardečo spektroskopijo (FTIR), vrstično elektronsko mikroskopijo (SEM), dinamičnim svetlobnim sipanjem (DLS), rentgensko difrakcijo (XRD), difuzno refleksno spektroskopijo, termogravimetrično analizo (TGA), temperaturno programirano desorpcijo (TPD) in temperaturno programirano redukcijo (TPR). Nadalje smo z uporabo tega katalizatorja izvedli vrsto reakcij esterifikacij oleinske kisline v metanolu s proizvodnjo metil estra oleinske kisline. Vse eksperimente smo izvedli v
laboratorijskem šaržnem reaktorju. Preučevali smo vpliv reakcijske temperature (55, 60, in 64,5) °C in mase katalizatorja m (0,2, 0,4 in 0,6) g na presnovo reakcije. Učinkovitost reakcije smo spremljali z določanjem koncentracije oleinske kisline in metil oleata z uporabo GC-FID. Preverili smo ohranjanje aktivnosti katalizatorja po večkratni zaporedni uporabi. Študijo smo nadgradili z določitvijo kinetičnih parametrov izvedene reakcije.
PB  - Ljubljana, Slovenija : Slovensko kemijsko društvo
C3  - Zbornik povzetkov Slovenski kemijski dnevi 2019, Maribor, Slovenija / Book of abstracts - 25th Annual Meeting of the Slovenian Chemical Society
T1  - Sinteza, karakterizacija in uporaba Al-SBA-15 katalizatorja
UR  - https://hdl.handle.net/21.15107/rcub_cer_3792
ER  - 

@conference{
author = "Pečar, Darja and Mićić, Vladan and Pavlović, Stefan and Stanković, Miroslav and Goršek, Andreja",
year = "2019",
abstract = "Naraščajoče povpraševanje po varnih industrijskih procesih je pripeljalo do razvoja in uporabe okolju prijaznih trdnih katalizatorjev, namenjenih za uporabo pri kislinsko kataliziranih reakcijah z dodano vrednostjo. Kislinska kataliza je eden najpogostejših procesov v kemični industriji. Industrijsko pomembne organske trasformacije vključujejo esterifikacije in transesterifikacije, eterifikacije, dehidracije, oksidacije, acetilacije, sililacije, sintezo biodizla [1,2]. Trdni kislinski katalizatorji, znani kot "zeleni katalizatorji", se uporabljajo kot nadomestek za homogene kislinske katalizatorje. Vsebujejo več okolju prijaznih komponent, hkrati pa zagotavljajo večjo aktivnost in selektivnost v primerjavi z obstoječimi homogenimi katalizatorji [3]. Primer heterogenega katalizatorja je mezoporozna silika - modificiran SBA-15, ki se uporablja za številne
organske reakcije. V tej študiji smo se osredotočili na sintezo trdnega kislinskega katalizatorja na osnovi mezoporoznega silike SBA-15 z inkorporiranim kovinskim Al. Z ujetjem kovine v silikatno matrico se katalizatorju izboljšata aktivnost in selektivnost, postane bolj temperaturno obstojen in pridobi večje možnosti za ponovno uporabo. Sintetiziran katalizator smo karakterizirali z adsorpcijo-desorpcijo dušika (BET), živosrebrno porozimetrijo, Fourierjevo transformacijsko infrardečo spektroskopijo (FTIR), vrstično elektronsko mikroskopijo (SEM), dinamičnim svetlobnim sipanjem (DLS), rentgensko difrakcijo (XRD), difuzno refleksno spektroskopijo, termogravimetrično analizo (TGA), temperaturno programirano desorpcijo (TPD) in temperaturno programirano redukcijo (TPR). Nadalje smo z uporabo tega katalizatorja izvedli vrsto reakcij esterifikacij oleinske kisline v metanolu s proizvodnjo metil estra oleinske kisline. Vse eksperimente smo izvedli v
laboratorijskem šaržnem reaktorju. Preučevali smo vpliv reakcijske temperature (55, 60, in 64,5) °C in mase katalizatorja m (0,2, 0,4 in 0,6) g na presnovo reakcije. Učinkovitost reakcije smo spremljali z določanjem koncentracije oleinske kisline in metil oleata z uporabo GC-FID. Preverili smo ohranjanje aktivnosti katalizatorja po večkratni zaporedni uporabi. Študijo smo nadgradili z določitvijo kinetičnih parametrov izvedene reakcije.",
publisher = "Ljubljana, Slovenija : Slovensko kemijsko društvo",
journal = "Zbornik povzetkov Slovenski kemijski dnevi 2019, Maribor, Slovenija / Book of abstracts - 25th Annual Meeting of the Slovenian Chemical Society",
title = "Sinteza, karakterizacija in uporaba Al-SBA-15 katalizatorja",
url = "https://hdl.handle.net/21.15107/rcub_cer_3792"
}

Pečar, D., Mićić, V., Pavlović, S., Stanković, M.,& Goršek, A.. (2019). Sinteza, karakterizacija in uporaba Al-SBA-15 katalizatorja. in Zbornik povzetkov Slovenski kemijski dnevi 2019, Maribor, Slovenija / Book of abstracts - 25th Annual Meeting of the Slovenian Chemical Society
Ljubljana, Slovenija : Slovensko kemijsko društvo..
https://hdl.handle.net/21.15107/rcub_cer_3792

Pečar D, Mićić V, Pavlović S, Stanković M, Goršek A. Sinteza, karakterizacija in uporaba Al-SBA-15 katalizatorja. in Zbornik povzetkov Slovenski kemijski dnevi 2019, Maribor, Slovenija / Book of abstracts - 25th Annual Meeting of the Slovenian Chemical Society. 2019;.
https://hdl.handle.net/21.15107/rcub_cer_3792 .

Pečar, Darja, Mićić, Vladan, Pavlović, Stefan, Stanković, Miroslav, Goršek, Andreja, "Sinteza, karakterizacija in uporaba Al-SBA-15 katalizatorja" in Zbornik povzetkov Slovenski kemijski dnevi 2019, Maribor, Slovenija / Book of abstracts - 25th Annual Meeting of the Slovenian Chemical Society (2019),
https://hdl.handle.net/21.15107/rcub_cer_3792 .

TY  - JOUR
AU  - Marinković, Dalibor
AU  - Miladinović, Marija R.
AU  - Avramović, Jelena M.
AU  - Krstić, Ivan
AU  - Stanković, Miroslav
AU  - Stamenković, Olivera
AU  - Jovanović, Dušan M.
AU  - Veljković, Vlada B.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2301
AB  - Kinetic modeling and optimization of sunflower oil methanolysis catalyzed by spherically-shaped CaO/gamma-Al2O3 particles were conducted in batch stirred and packed-bed tubular reactors at 60 degrees C. The proposed three-parameter kinetic model describing the overall reaction with a variable mechanism was successfully applied to both batch and continuous reactions. The process optimization was done using the response surface methodology combined with a central composite design. The obtained optimal catalyst concentration, methanol-to-oil molar ratio and reaction time for the batch reaction were 0.55% (CaO to the oil), 9:1 and 5.22 h, respectively. In the continuous process, the catalyst was highly active stable and slightly leachable during 30 h. The deactivation of the catalyst was due to massive deposition of the organic molecules from the reaction mixture, which sheltered the catalytically active sites on the catalyst surface.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - Energy Conversion and Management
T1  - Kinetic modeling and optimization of sunflower oil methanolysis catalyzed by spherically-shaped CaO/gamma-Al2O3 catalyst
VL  - 163
SP  - 122
EP  - 133
DO  - 10.1016/j.enconman.2018.02.048
ER  - 

@article{
author = "Marinković, Dalibor and Miladinović, Marija R. and Avramović, Jelena M. and Krstić, Ivan and Stanković, Miroslav and Stamenković, Olivera and Jovanović, Dušan M. and Veljković, Vlada B.",
year = "2018",
abstract = "Kinetic modeling and optimization of sunflower oil methanolysis catalyzed by spherically-shaped CaO/gamma-Al2O3 particles were conducted in batch stirred and packed-bed tubular reactors at 60 degrees C. The proposed three-parameter kinetic model describing the overall reaction with a variable mechanism was successfully applied to both batch and continuous reactions. The process optimization was done using the response surface methodology combined with a central composite design. The obtained optimal catalyst concentration, methanol-to-oil molar ratio and reaction time for the batch reaction were 0.55% (CaO to the oil), 9:1 and 5.22 h, respectively. In the continuous process, the catalyst was highly active stable and slightly leachable during 30 h. The deactivation of the catalyst was due to massive deposition of the organic molecules from the reaction mixture, which sheltered the catalytically active sites on the catalyst surface.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "Energy Conversion and Management",
title = "Kinetic modeling and optimization of sunflower oil methanolysis catalyzed by spherically-shaped CaO/gamma-Al2O3 catalyst",
volume = "163",
pages = "122-133",
doi = "10.1016/j.enconman.2018.02.048"
}

Marinković, D., Miladinović, M. R., Avramović, J. M., Krstić, I., Stanković, M., Stamenković, O., Jovanović, D. M.,& Veljković, V. B.. (2018). Kinetic modeling and optimization of sunflower oil methanolysis catalyzed by spherically-shaped CaO/gamma-Al2O3 catalyst. in Energy Conversion and Management
Oxford : Pergamon-Elsevier Science Ltd., 163, 122-133.
https://doi.org/10.1016/j.enconman.2018.02.048

Marinković D, Miladinović MR, Avramović JM, Krstić I, Stanković M, Stamenković O, Jovanović DM, Veljković VB. Kinetic modeling and optimization of sunflower oil methanolysis catalyzed by spherically-shaped CaO/gamma-Al2O3 catalyst. in Energy Conversion and Management. 2018;163:122-133.
doi:10.1016/j.enconman.2018.02.048 .

Marinković, Dalibor, Miladinović, Marija R., Avramović, Jelena M., Krstić, Ivan, Stanković, Miroslav, Stamenković, Olivera, Jovanović, Dušan M., Veljković, Vlada B., "Kinetic modeling and optimization of sunflower oil methanolysis catalyzed by spherically-shaped CaO/gamma-Al2O3 catalyst" in Energy Conversion and Management, 163 (2018):122-133,
https://doi.org/10.1016/j.enconman.2018.02.048 . .

TY  - DATA
AU  - Marinković, Dalibor
AU  - Miladinović, Marija R.
AU  - Avramović, Jelena M.
AU  - Krstić, Ivan
AU  - Stanković, Miroslav
AU  - Stamenković, Olivera
AU  - Jovanović, Dušan M.
AU  - Veljković, Vlada B.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4490
AB  - Supplementary material for: Marinković, D., Miladinovic, M. R., Avramović, J. M., Krstic, I. B., Stanković, M., Stamenković, O., Jovanović, D. M.,& Veljković, V. B. (2018). Kinetic modeling and optimization of sunflower oil methanolysis catalyzed by spherically-shaped CaO/gamma-Al2O3 catalyst. Energy Conversion and Management, 163, 122-133. https://doi.org/10.1016/j.enconman.2018.02.048
PB  - Elsevier
T2  - Energy Conversion and Management
T1  - Supplementary material for: "Kinetic modeling and optimization of sunflower oil methanolysis catalyzed by spherically-shaped CaO/gamma-Al2O3 catalyst"
UR  - https://hdl.handle.net/21.15107/rcub_cer_4490
ER  - 

@misc{
author = "Marinković, Dalibor and Miladinović, Marija R. and Avramović, Jelena M. and Krstić, Ivan and Stanković, Miroslav and Stamenković, Olivera and Jovanović, Dušan M. and Veljković, Vlada B.",
year = "2018",
abstract = "Supplementary material for: Marinković, D., Miladinovic, M. R., Avramović, J. M., Krstic, I. B., Stanković, M., Stamenković, O., Jovanović, D. M.,& Veljković, V. B. (2018). Kinetic modeling and optimization of sunflower oil methanolysis catalyzed by spherically-shaped CaO/gamma-Al2O3 catalyst. Energy Conversion and Management, 163, 122-133. https://doi.org/10.1016/j.enconman.2018.02.048",
publisher = "Elsevier",
journal = "Energy Conversion and Management",
title = "Supplementary material for: "Kinetic modeling and optimization of sunflower oil methanolysis catalyzed by spherically-shaped CaO/gamma-Al2O3 catalyst"",
url = "https://hdl.handle.net/21.15107/rcub_cer_4490"
}

Marinković, D., Miladinović, M. R., Avramović, J. M., Krstić, I., Stanković, M., Stamenković, O., Jovanović, D. M.,& Veljković, V. B.. (2018). Supplementary material for: "Kinetic modeling and optimization of sunflower oil methanolysis catalyzed by spherically-shaped CaO/gamma-Al2O3 catalyst". in Energy Conversion and Management
Elsevier..
https://hdl.handle.net/21.15107/rcub_cer_4490

Marinković D, Miladinović MR, Avramović JM, Krstić I, Stanković M, Stamenković O, Jovanović DM, Veljković VB. Supplementary material for: "Kinetic modeling and optimization of sunflower oil methanolysis catalyzed by spherically-shaped CaO/gamma-Al2O3 catalyst". in Energy Conversion and Management. 2018;.
https://hdl.handle.net/21.15107/rcub_cer_4490 .

Marinković, Dalibor, Miladinović, Marija R., Avramović, Jelena M., Krstić, Ivan, Stanković, Miroslav, Stamenković, Olivera, Jovanović, Dušan M., Veljković, Vlada B., "Supplementary material for: "Kinetic modeling and optimization of sunflower oil methanolysis catalyzed by spherically-shaped CaO/gamma-Al2O3 catalyst"" in Energy Conversion and Management (2018),
https://hdl.handle.net/21.15107/rcub_cer_4490 .

TY  - JOUR
AU  - Pajnik, Jelena
AU  - Radetić, Maja
AU  - Stojanovic, Dusica B.
AU  - Janković-Častvan, Ivona
AU  - Tadić, Vanja
AU  - Stanković, Miroslav
AU  - Jovanović, Dušan M.
AU  - Žižović, Irena
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4276
AB  - This study discusses the possibility of supercritical solvent impregnation of polypropylene and polyamide fabrics as well as cellulose acetate in the form of beads and films with pyrethrum extract in order to fabricate functionalized materials with repellent properties. Impregnation experiments were performed at temperature of 40 degrees C and pressures of 10 and 20 MPa in supercritical carbon dioxide. The time of impregnation was varied from 0.5 to 18 h. Loadings of pyrethrum extract into polypropylene fabrics and cellulose acetate films higher than 30% were attainable at 10 MPa. In the case of polyamide fabrics and cellulose acetate beads, the pressure of 20 MPa was needed for obtaining the loadings higher than 11%. Pyrethrum extract release study revealed different capabilities of the tested materials for the repellent release, implying a variety of their possible applications. The impregnated solids were characterized by SEM, DSC, FTIR, Mercury intrusion porosimetry analyses and HPLC analyses.
PB  - Elsevier
T2  - Journal of Supercritical Fluids
T1  - Functionalization of polypropylene, polyamide and cellulose acetate materials with pyrethrum extract as a natural repellent in supercritical carbon dioxide
VL  - 136
SP  - 70
EP  - 81
DO  - 10.1016/j.supflu.2018.02.014
ER  - 

@article{
author = "Pajnik, Jelena and Radetić, Maja and Stojanovic, Dusica B. and Janković-Častvan, Ivona and Tadić, Vanja and Stanković, Miroslav and Jovanović, Dušan M. and Žižović, Irena",
year = "2018",
abstract = "This study discusses the possibility of supercritical solvent impregnation of polypropylene and polyamide fabrics as well as cellulose acetate in the form of beads and films with pyrethrum extract in order to fabricate functionalized materials with repellent properties. Impregnation experiments were performed at temperature of 40 degrees C and pressures of 10 and 20 MPa in supercritical carbon dioxide. The time of impregnation was varied from 0.5 to 18 h. Loadings of pyrethrum extract into polypropylene fabrics and cellulose acetate films higher than 30% were attainable at 10 MPa. In the case of polyamide fabrics and cellulose acetate beads, the pressure of 20 MPa was needed for obtaining the loadings higher than 11%. Pyrethrum extract release study revealed different capabilities of the tested materials for the repellent release, implying a variety of their possible applications. The impregnated solids were characterized by SEM, DSC, FTIR, Mercury intrusion porosimetry analyses and HPLC analyses.",
publisher = "Elsevier",
journal = "Journal of Supercritical Fluids",
title = "Functionalization of polypropylene, polyamide and cellulose acetate materials with pyrethrum extract as a natural repellent in supercritical carbon dioxide",
volume = "136",
pages = "70-81",
doi = "10.1016/j.supflu.2018.02.014"
}

Pajnik, J., Radetić, M., Stojanovic, D. B., Janković-Častvan, I., Tadić, V., Stanković, M., Jovanović, D. M.,& Žižović, I.. (2018). Functionalization of polypropylene, polyamide and cellulose acetate materials with pyrethrum extract as a natural repellent in supercritical carbon dioxide. in Journal of Supercritical Fluids
Elsevier., 136, 70-81.
https://doi.org/10.1016/j.supflu.2018.02.014

Pajnik J, Radetić M, Stojanovic DB, Janković-Častvan I, Tadić V, Stanković M, Jovanović DM, Žižović I. Functionalization of polypropylene, polyamide and cellulose acetate materials with pyrethrum extract as a natural repellent in supercritical carbon dioxide. in Journal of Supercritical Fluids. 2018;136:70-81.
doi:10.1016/j.supflu.2018.02.014 .

Pajnik, Jelena, Radetić, Maja, Stojanovic, Dusica B., Janković-Častvan, Ivona, Tadić, Vanja, Stanković, Miroslav, Jovanović, Dušan M., Žižović, Irena, "Functionalization of polypropylene, polyamide and cellulose acetate materials with pyrethrum extract as a natural repellent in supercritical carbon dioxide" in Journal of Supercritical Fluids, 136 (2018):70-81,
https://doi.org/10.1016/j.supflu.2018.02.014 . .

TY  - JOUR
AU  - Pajnik, Jelena
AU  - Radetić, Maja
AU  - Stojanovic, Dusica B.
AU  - Janković-Častvan, Ivona
AU  - Tadić, Vanja
AU  - Stanković, Miroslav
AU  - Jovanović, Dušan M.
AU  - Žižović, Irena
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2298
AB  - This study discusses the possibility of supercritical solvent impregnation of polypropylene and polyamide fabrics as well as cellulose acetate in the form of beads and films with pyrethrum extract in order to fabricate functionalized materials with repellent properties. Impregnation experiments were performed at temperature of 40 degrees C and pressures of 10 and 20 MPa in supercritical carbon dioxide. The time of impregnation was varied from 0.5 to 18 h. Loadings of pyrethrum extract into polypropylene fabrics and cellulose acetate films higher than 30% were attainable at 10 MPa. In the case of polyamide fabrics and cellulose acetate beads, the pressure of 20 MPa was needed for obtaining the loadings higher than 11%. Pyrethrum extract release study revealed different capabilities of the tested materials for the repellent release, implying a variety of their possible applications. The impregnated solids were characterized by SEM, DSC, FTIR, Mercury intrusion porosimetry analyses and HPLC analyses.
PB  - Elsevier
T2  - Journal of Supercritical Fluids
T1  - Functionalization of polypropylene, polyamide and cellulose acetate materials with pyrethrum extract as a natural repellent in supercritical carbon dioxide
VL  - 136
SP  - 70
EP  - 81
DO  - 10.1016/j.supflu.2018.02.014
ER  - 

@article{
author = "Pajnik, Jelena and Radetić, Maja and Stojanovic, Dusica B. and Janković-Častvan, Ivona and Tadić, Vanja and Stanković, Miroslav and Jovanović, Dušan M. and Žižović, Irena",
year = "2018",
abstract = "This study discusses the possibility of supercritical solvent impregnation of polypropylene and polyamide fabrics as well as cellulose acetate in the form of beads and films with pyrethrum extract in order to fabricate functionalized materials with repellent properties. Impregnation experiments were performed at temperature of 40 degrees C and pressures of 10 and 20 MPa in supercritical carbon dioxide. The time of impregnation was varied from 0.5 to 18 h. Loadings of pyrethrum extract into polypropylene fabrics and cellulose acetate films higher than 30% were attainable at 10 MPa. In the case of polyamide fabrics and cellulose acetate beads, the pressure of 20 MPa was needed for obtaining the loadings higher than 11%. Pyrethrum extract release study revealed different capabilities of the tested materials for the repellent release, implying a variety of their possible applications. The impregnated solids were characterized by SEM, DSC, FTIR, Mercury intrusion porosimetry analyses and HPLC analyses.",
publisher = "Elsevier",
journal = "Journal of Supercritical Fluids",
title = "Functionalization of polypropylene, polyamide and cellulose acetate materials with pyrethrum extract as a natural repellent in supercritical carbon dioxide",
volume = "136",
pages = "70-81",
doi = "10.1016/j.supflu.2018.02.014"
}

Pajnik, J., Radetić, M., Stojanovic, D. B., Janković-Častvan, I., Tadić, V., Stanković, M., Jovanović, D. M.,& Žižović, I.. (2018). Functionalization of polypropylene, polyamide and cellulose acetate materials with pyrethrum extract as a natural repellent in supercritical carbon dioxide. in Journal of Supercritical Fluids
Elsevier., 136, 70-81.
https://doi.org/10.1016/j.supflu.2018.02.014

Pajnik J, Radetić M, Stojanovic DB, Janković-Častvan I, Tadić V, Stanković M, Jovanović DM, Žižović I. Functionalization of polypropylene, polyamide and cellulose acetate materials with pyrethrum extract as a natural repellent in supercritical carbon dioxide. in Journal of Supercritical Fluids. 2018;136:70-81.
doi:10.1016/j.supflu.2018.02.014 .

Pajnik, Jelena, Radetić, Maja, Stojanovic, Dusica B., Janković-Častvan, Ivona, Tadić, Vanja, Stanković, Miroslav, Jovanović, Dušan M., Žižović, Irena, "Functionalization of polypropylene, polyamide and cellulose acetate materials with pyrethrum extract as a natural repellent in supercritical carbon dioxide" in Journal of Supercritical Fluids, 136 (2018):70-81,
https://doi.org/10.1016/j.supflu.2018.02.014 . .

TY  - CONF
AU  - Marinković, Dalibor
AU  - Gabrovska, Margarita
AU  - Nikolova, Dimitrinka
AU  - Pavlović, Stefan
AU  - Milovanović, B.
AU  - Stanković, Miroslav
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2890
AB  - Lithium modified Mg/Al hydrotalcite-like samples with different Li content
were synthesized using co-precipitation followed by calcination at 500 °C.
The samples were characterized by means of XRD, DRIFTS, SEM-EDS,
LDPSA and MIP. Results from this study indicated that the addition of Li
modifier influences the change in structural, textural and morphological
characteristics, more pronounced in samples with higher lithium content.
PB  - Society of Physical Chemists of Serbia
PB  - Društvo fizikohemičara Srbije
C3  - Physical Chemistry 2018 – 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry
T1  - Synthesis and characterization of mixed oxides derivate from Li modified Mg-Al hydrotalcites
VL  - 2
SP  - 657
EP  - 660
UR  - https://hdl.handle.net/21.15107/rcub_cer_2890
ER  - 

@conference{
author = "Marinković, Dalibor and Gabrovska, Margarita and Nikolova, Dimitrinka and Pavlović, Stefan and Milovanović, B. and Stanković, Miroslav",
year = "2018",
abstract = "Lithium modified Mg/Al hydrotalcite-like samples with different Li content
were synthesized using co-precipitation followed by calcination at 500 °C.
The samples were characterized by means of XRD, DRIFTS, SEM-EDS,
LDPSA and MIP. Results from this study indicated that the addition of Li
modifier influences the change in structural, textural and morphological
characteristics, more pronounced in samples with higher lithium content.",
publisher = "Society of Physical Chemists of Serbia, Društvo fizikohemičara Srbije",
journal = "Physical Chemistry 2018 – 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry",
title = "Synthesis and characterization of mixed oxides derivate from Li modified Mg-Al hydrotalcites",
volume = "2",
pages = "657-660",
url = "https://hdl.handle.net/21.15107/rcub_cer_2890"
}

Marinković, D., Gabrovska, M., Nikolova, D., Pavlović, S., Milovanović, B.,& Stanković, M.. (2018). Synthesis and characterization of mixed oxides derivate from Li modified Mg-Al hydrotalcites. in Physical Chemistry 2018 – 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry
Society of Physical Chemists of Serbia., 2, 657-660.
https://hdl.handle.net/21.15107/rcub_cer_2890

Marinković D, Gabrovska M, Nikolova D, Pavlović S, Milovanović B, Stanković M. Synthesis and characterization of mixed oxides derivate from Li modified Mg-Al hydrotalcites. in Physical Chemistry 2018 – 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry. 2018;2:657-660.
https://hdl.handle.net/21.15107/rcub_cer_2890 .

Marinković, Dalibor, Gabrovska, Margarita, Nikolova, Dimitrinka, Pavlović, Stefan, Milovanović, B., Stanković, Miroslav, "Synthesis and characterization of mixed oxides derivate from Li modified Mg-Al hydrotalcites" in Physical Chemistry 2018 – 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry, 2 (2018):657-660,
https://hdl.handle.net/21.15107/rcub_cer_2890 .

TY  - CONF
AU  - Pavlović, Stefan
AU  - Marinković, Dalibor
AU  - Stanković, Miroslav
AU  - Milovanović, Biljana
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2891
AB  - The zeolite from F class coal fly ash (FA) was prepared from alkali fused fly ash
followed by hydrothermal treatment. Sodium water glass obtained from the calcined and
acid activated FA and sodium aluminate were used in zeolitization. Hydrothermal
reaction was performed at 90°C for 4h. The prepared zeolitic material was characterized
by EDX, XRD, FT-IR and Hg-porosimetry. The concentrations of the main components
SiO2, Al2O3, and Na2O in the synthesized material are: 51.45%, 30.01%, and 16.64%,
respectively. The diffraction patterns show that the characteristics lines are at 14.4°,
20.5°, 25.5°, 32.7°, 39°, and 44.5° that are typical for Na-X zeolite. The FT-IR spectra
show that the strongest vibration is at 960 cm-1 (T-O stretch), whereas the vibrations in
the region between 600 and 750 cm-1 are related to tetrahedral atoms in zeolite structure
[1, 2]. The Hg porsimetry measurements show that the porosity of obtained material is
around 62% and the total pore volume is 1,10 cm3/g. Such characteristics of the prepared
zeolitic material allow its use in various catalytic chemical processes for converting
vegetable oil to biofuel including transesterification, deoxygenation, thermal cracking,
catalytic cracking, and hydroprocessing.
PB  - Serbian Chemical Society
C3  - Sixt Conference of the Young Chemists of Serbia
T1  - Preparation of zeolite from coal fly ash as waste raw material
SP  - 99
UR  - https://hdl.handle.net/21.15107/rcub_cer_2891
ER  - 

@conference{
author = "Pavlović, Stefan and Marinković, Dalibor and Stanković, Miroslav and Milovanović, Biljana",
year = "2018",
abstract = "The zeolite from F class coal fly ash (FA) was prepared from alkali fused fly ash
followed by hydrothermal treatment. Sodium water glass obtained from the calcined and
acid activated FA and sodium aluminate were used in zeolitization. Hydrothermal
reaction was performed at 90°C for 4h. The prepared zeolitic material was characterized
by EDX, XRD, FT-IR and Hg-porosimetry. The concentrations of the main components
SiO2, Al2O3, and Na2O in the synthesized material are: 51.45%, 30.01%, and 16.64%,
respectively. The diffraction patterns show that the characteristics lines are at 14.4°,
20.5°, 25.5°, 32.7°, 39°, and 44.5° that are typical for Na-X zeolite. The FT-IR spectra
show that the strongest vibration is at 960 cm-1 (T-O stretch), whereas the vibrations in
the region between 600 and 750 cm-1 are related to tetrahedral atoms in zeolite structure
[1, 2]. The Hg porsimetry measurements show that the porosity of obtained material is
around 62% and the total pore volume is 1,10 cm3/g. Such characteristics of the prepared
zeolitic material allow its use in various catalytic chemical processes for converting
vegetable oil to biofuel including transesterification, deoxygenation, thermal cracking,
catalytic cracking, and hydroprocessing.",
publisher = "Serbian Chemical Society",
journal = "Sixt Conference of the Young Chemists of Serbia",
title = "Preparation of zeolite from coal fly ash as waste raw material",
pages = "99",
url = "https://hdl.handle.net/21.15107/rcub_cer_2891"
}

Pavlović, S., Marinković, D., Stanković, M.,& Milovanović, B.. (2018). Preparation of zeolite from coal fly ash as waste raw material. in Sixt Conference of the Young Chemists of Serbia
Serbian Chemical Society., 99.
https://hdl.handle.net/21.15107/rcub_cer_2891

Pavlović S, Marinković D, Stanković M, Milovanović B. Preparation of zeolite from coal fly ash as waste raw material. in Sixt Conference of the Young Chemists of Serbia. 2018;:99.
https://hdl.handle.net/21.15107/rcub_cer_2891 .

Pavlović, Stefan, Marinković, Dalibor, Stanković, Miroslav, Milovanović, Biljana, "Preparation of zeolite from coal fly ash as waste raw material" in Sixt Conference of the Young Chemists of Serbia (2018):99,
https://hdl.handle.net/21.15107/rcub_cer_2891 .

TY  - JOUR
AU  - Gabrovska, Margarita
AU  - Nikolova, Dimitrinka
AU  - Krstić, Jugoslav
AU  - Lončarević, Davor
AU  - Tzvetkov, P.T.
AU  - Shopska, M.G.
AU  - Radonjić, Vojkan
AU  - Stanković, Miroslav
AU  - Jovanović, D.M.
AU  - Spasov, L.Т.
AU  - Simeonov, D.B.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2390
AB  - Mg-doped co-precipitated Ni/SIG precursors were studied as edible sunflower oil hydrogenation catalysts applying two types of commercial silica gels (SIG) as supports of different texture characteristics: a microporous type (SIG-A) and a mesoporous type (SIG-C). It was found that texture parameters of both the silica gels and magnesium addition allow obtaining of catalysts of various hydrogenation activities and fatty acid composition of the products. The results reveal the highest hydrogenation activity of MgNi/SIG-C catalyst because of higher amount and accessibility of metal nickel particles on the catalyst surface generated through reduction procedure. A dominant activity of MgNi/SIG-C catalyst is ascribed to appropriate mesoporosity, which controls diffusion. It was established that Mg-doped Ni/SIG-C possessed a capacity for use as an efficient edible vegetable oil hydrogenation catalyst due to high hydrogenation activity, high saturation level of linoleic acid (C18:2cis), moderate amounts of C18:1trans fatty acids, and C18:0 stearin acid formation in the partially hydrogenated sunflower oil.
PB  - Bulgarian Academy of Sciences
T2  - Bulgarian Chemical Communications
T1  - Improved catalyst performance of Ni/SiO2 in vegetable oil hydrogenation: Impact of Mg dopant
VL  - 50
SP  - 161
EP  - 168
UR  - https://hdl.handle.net/21.15107/rcub_cer_2390
ER  - 

@article{
author = "Gabrovska, Margarita and Nikolova, Dimitrinka and Krstić, Jugoslav and Lončarević, Davor and Tzvetkov, P.T. and Shopska, M.G. and Radonjić, Vojkan and Stanković, Miroslav and Jovanović, D.M. and Spasov, L.Т. and Simeonov, D.B.",
year = "2018",
abstract = "Mg-doped co-precipitated Ni/SIG precursors were studied as edible sunflower oil hydrogenation catalysts applying two types of commercial silica gels (SIG) as supports of different texture characteristics: a microporous type (SIG-A) and a mesoporous type (SIG-C). It was found that texture parameters of both the silica gels and magnesium addition allow obtaining of catalysts of various hydrogenation activities and fatty acid composition of the products. The results reveal the highest hydrogenation activity of MgNi/SIG-C catalyst because of higher amount and accessibility of metal nickel particles on the catalyst surface generated through reduction procedure. A dominant activity of MgNi/SIG-C catalyst is ascribed to appropriate mesoporosity, which controls diffusion. It was established that Mg-doped Ni/SIG-C possessed a capacity for use as an efficient edible vegetable oil hydrogenation catalyst due to high hydrogenation activity, high saturation level of linoleic acid (C18:2cis), moderate amounts of C18:1trans fatty acids, and C18:0 stearin acid formation in the partially hydrogenated sunflower oil.",
publisher = "Bulgarian Academy of Sciences",
journal = "Bulgarian Chemical Communications",
title = "Improved catalyst performance of Ni/SiO2 in vegetable oil hydrogenation: Impact of Mg dopant",
volume = "50",
pages = "161-168",
url = "https://hdl.handle.net/21.15107/rcub_cer_2390"
}

Gabrovska, M., Nikolova, D., Krstić, J., Lončarević, D., Tzvetkov, P.T., Shopska, M.G., Radonjić, V., Stanković, M., Jovanović, D.M., Spasov, L.Т.,& Simeonov, D.B.. (2018). Improved catalyst performance of Ni/SiO2 in vegetable oil hydrogenation: Impact of Mg dopant. in Bulgarian Chemical Communications
Bulgarian Academy of Sciences., 50, 161-168.
https://hdl.handle.net/21.15107/rcub_cer_2390

Gabrovska M, Nikolova D, Krstić J, Lončarević D, Tzvetkov P, Shopska M, Radonjić V, Stanković M, Jovanović D, Spasov L, Simeonov D. Improved catalyst performance of Ni/SiO2 in vegetable oil hydrogenation: Impact of Mg dopant. in Bulgarian Chemical Communications. 2018;50:161-168.
https://hdl.handle.net/21.15107/rcub_cer_2390 .

Gabrovska, Margarita, Nikolova, Dimitrinka, Krstić, Jugoslav, Lončarević, Davor, Tzvetkov, P.T., Shopska, M.G., Radonjić, Vojkan, Stanković, Miroslav, Jovanović, D.M., Spasov, L.Т., Simeonov, D.B., "Improved catalyst performance of Ni/SiO2 in vegetable oil hydrogenation: Impact of Mg dopant" in Bulgarian Chemical Communications, 50 (2018):161-168,
https://hdl.handle.net/21.15107/rcub_cer_2390 .

TY  - CONF
AU  - Pavlović, Stefan
AU  - Kostić, Bojan
AU  - Marinković, Dalibor
AU  - Gabrovska, Margarita
AU  - Nikolova, Dimitrinka
AU  - Lončarević, Davor
AU  - Stanković, Miroslav
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2889
AB  - Mg-Al hydrotalcites (Mg/Al molar ratio 3/1) doped with varying amounts of
lanthanum were prepared using co-precipitation followed by calcination in
order to study the effect of lanthanum on their structure and morphology.
Samples were characterized by several methods: XRD, FT-IR, SEM-EDS,
LDPSA and MIP. It was found that the addition of lanthanum affects the
structure and morphology of the obtained metal oxides derived from Ladoped
Mg-Al hydrotalcites, making it effective dopant for (Mg/Al/La)Otype
materials, being very promising for various catalytic reactions.
PB  - Society of Physical Chemists of Serbia
PB  - Društvo fizikohemičara Srbije
C3  - Physical Chemistry 2018 – 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry (24-09-2018)
T1  - Structure and morphology of calcined lanthanum doped hydrotalcite
VL  - 2
SP  - 653
EP  - 656
UR  - https://hdl.handle.net/21.15107/rcub_cer_2889
ER  - 

@conference{
author = "Pavlović, Stefan and Kostić, Bojan and Marinković, Dalibor and Gabrovska, Margarita and Nikolova, Dimitrinka and Lončarević, Davor and Stanković, Miroslav",
year = "2018",
abstract = "Mg-Al hydrotalcites (Mg/Al molar ratio 3/1) doped with varying amounts of
lanthanum were prepared using co-precipitation followed by calcination in
order to study the effect of lanthanum on their structure and morphology.
Samples were characterized by several methods: XRD, FT-IR, SEM-EDS,
LDPSA and MIP. It was found that the addition of lanthanum affects the
structure and morphology of the obtained metal oxides derived from Ladoped
Mg-Al hydrotalcites, making it effective dopant for (Mg/Al/La)Otype
materials, being very promising for various catalytic reactions.",
publisher = "Society of Physical Chemists of Serbia, Društvo fizikohemičara Srbije",
journal = "Physical Chemistry 2018 – 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry (24-09-2018)",
title = "Structure and morphology of calcined lanthanum doped hydrotalcite",
volume = "2",
pages = "653-656",
url = "https://hdl.handle.net/21.15107/rcub_cer_2889"
}

Pavlović, S., Kostić, B., Marinković, D., Gabrovska, M., Nikolova, D., Lončarević, D.,& Stanković, M.. (2018). Structure and morphology of calcined lanthanum doped hydrotalcite. in Physical Chemistry 2018 – 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry (24-09-2018)
Society of Physical Chemists of Serbia., 2, 653-656.
https://hdl.handle.net/21.15107/rcub_cer_2889

Pavlović S, Kostić B, Marinković D, Gabrovska M, Nikolova D, Lončarević D, Stanković M. Structure and morphology of calcined lanthanum doped hydrotalcite. in Physical Chemistry 2018 – 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry (24-09-2018). 2018;2:653-656.
https://hdl.handle.net/21.15107/rcub_cer_2889 .

Pavlović, Stefan, Kostić, Bojan, Marinković, Dalibor, Gabrovska, Margarita, Nikolova, Dimitrinka, Lončarević, Davor, Stanković, Miroslav, "Structure and morphology of calcined lanthanum doped hydrotalcite" in Physical Chemistry 2018 – 14th International Conference on Fundamental and Applied Aspects of Physical Chemistry (24-09-2018), 2 (2018):653-656,
https://hdl.handle.net/21.15107/rcub_cer_2889 .

TY  - JOUR
AU  - Ljubijankić, N.
AU  - Begić, Sabina
AU  - Ljubović-Dedeić, A.
AU  - Stanković, Miroslav
AU  - Salimović-Bešić, I.
AU  - Jadranin, Milka
AU  - Bencun, B.
AU  - Ljubijankić, S.
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2408
AB  - In this study, novel hexa coordinated ruthenium(III) complex of the type Na[RuCl2L2)] (where L = monobasic bidentate Schiff base derived from the condensation of 5-nitrosalicyladehyde with aniline) has been synthesized and characterized by electrospray ionization time-of-flight mass spectrometry, infrared spectroscopy and ultraviolet/visible spectrophotometry. Schiff base N-phenyl-5-nitrosalicylideneimine is coordinated to the ruthenium via imine nitrogen and phenolic oxygen. Mass spectra showed molecular ion (M-) at m/z 653.9641 which corresponds to [C26H18Cl2N4O6Ru]-. The in vitro antimicrobial properties of the Schiff base and the complex were tested by micro-dilution technique and agar plate assay for determination of minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC). The compounds showed a higher antibacterial activity against tested Gram-positive bacteria (Staphylococcus aureus ATCC 33591 and ATCC 29213), whereas against the Gram-negative bacteria (Pseudomonas aeruginosa ATCC 27853, Escherichia coli ATCC 25922, Klebsiella pneumoniae ATCC 700603) were ineffective. The genotoxic effects of Ru(III) complex were investigated using the Cytokinesis Block Micronucleus (CBMN) assay in human lymphocytes cultures. The cell culture treated with the complex at a concentration of 3.7 µg/mL exhibit the most prominent effect of decreasing the frequency of micronucleus for 44%, while at the concentrations of 1.5 and 7.4 µg/mL effect is slightly lower (40%), compared to the control cell culture.
PB  - Rasayan Journal of Chemistry, c/o Dr. Pratima Sharma
T2  - Rasayan Journal of Chemistry
T1  - Antimicrobial and genotoxic activity of novel ruthenium(III) complex with n-phenyl-5-nitrosalicylideneimine
VL  - 11
IS  - 4
SP  - 1511
EP  - 1518
DO  - 10.31788/RJC.2018.1145021
ER  - 

@article{
author = "Ljubijankić, N. and Begić, Sabina and Ljubović-Dedeić, A. and Stanković, Miroslav and Salimović-Bešić, I. and Jadranin, Milka and Bencun, B. and Ljubijankić, S.",
year = "2018",
abstract = "In this study, novel hexa coordinated ruthenium(III) complex of the type Na[RuCl2L2)] (where L = monobasic bidentate Schiff base derived from the condensation of 5-nitrosalicyladehyde with aniline) has been synthesized and characterized by electrospray ionization time-of-flight mass spectrometry, infrared spectroscopy and ultraviolet/visible spectrophotometry. Schiff base N-phenyl-5-nitrosalicylideneimine is coordinated to the ruthenium via imine nitrogen and phenolic oxygen. Mass spectra showed molecular ion (M-) at m/z 653.9641 which corresponds to [C26H18Cl2N4O6Ru]-. The in vitro antimicrobial properties of the Schiff base and the complex were tested by micro-dilution technique and agar plate assay for determination of minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC). The compounds showed a higher antibacterial activity against tested Gram-positive bacteria (Staphylococcus aureus ATCC 33591 and ATCC 29213), whereas against the Gram-negative bacteria (Pseudomonas aeruginosa ATCC 27853, Escherichia coli ATCC 25922, Klebsiella pneumoniae ATCC 700603) were ineffective. The genotoxic effects of Ru(III) complex were investigated using the Cytokinesis Block Micronucleus (CBMN) assay in human lymphocytes cultures. The cell culture treated with the complex at a concentration of 3.7 µg/mL exhibit the most prominent effect of decreasing the frequency of micronucleus for 44%, while at the concentrations of 1.5 and 7.4 µg/mL effect is slightly lower (40%), compared to the control cell culture.",
publisher = "Rasayan Journal of Chemistry, c/o Dr. Pratima Sharma",
journal = "Rasayan Journal of Chemistry",
title = "Antimicrobial and genotoxic activity of novel ruthenium(III) complex with n-phenyl-5-nitrosalicylideneimine",
volume = "11",
number = "4",
pages = "1511-1518",
doi = "10.31788/RJC.2018.1145021"
}

Ljubijankić, N., Begić, S., Ljubović-Dedeić, A., Stanković, M., Salimović-Bešić, I., Jadranin, M., Bencun, B.,& Ljubijankić, S.. (2018). Antimicrobial and genotoxic activity of novel ruthenium(III) complex with n-phenyl-5-nitrosalicylideneimine. in Rasayan Journal of Chemistry
Rasayan Journal of Chemistry, c/o Dr. Pratima Sharma., 11(4), 1511-1518.
https://doi.org/10.31788/RJC.2018.1145021

Ljubijankić N, Begić S, Ljubović-Dedeić A, Stanković M, Salimović-Bešić I, Jadranin M, Bencun B, Ljubijankić S. Antimicrobial and genotoxic activity of novel ruthenium(III) complex with n-phenyl-5-nitrosalicylideneimine. in Rasayan Journal of Chemistry. 2018;11(4):1511-1518.
doi:10.31788/RJC.2018.1145021 .

Ljubijankić, N., Begić, Sabina, Ljubović-Dedeić, A., Stanković, Miroslav, Salimović-Bešić, I., Jadranin, Milka, Bencun, B., Ljubijankić, S., "Antimicrobial and genotoxic activity of novel ruthenium(III) complex with n-phenyl-5-nitrosalicylideneimine" in Rasayan Journal of Chemistry, 11, no. 4 (2018):1511-1518,
https://doi.org/10.31788/RJC.2018.1145021 . .

TY  - JOUR
AU  - Marinković, Dalibor
AU  - Avramović, Jelena M.
AU  - Stanković, Miroslav
AU  - Stamenković, Olivera
AU  - Jovanović, Dušan M.
AU  - Veljković, Vlada B.
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2255
AB  - Loading CaO onto spherically-shaped gamma-Al2O3 support was applied for the preparation of a cost-effective and environmentally-friendly heterogeneous catalyst for biodiesel production. Physico-chemical, textural and morphological characterization was performed using optical emission spectroscopy (ICP OES), Hg-porosimetry, N-2 physisorption, scanning electron microscopy (FESEM), X-ray diffraction (XRPD), Fourier transform infrared spectroscopy (ATR FTIR) and Hammett indicators. The effects of catalyst preparation conditions (different precursor salts and calcination temperatures) on the catalyst activity, and the reaction conditions (methanol-to-oil molar ratio and catalyst loading) on the reaction rate and esters yield were studied. In addition, catalyst stability was investigated. The most active catalyst was derived from the nitrate precursor after calcination at 475 degrees C (inert atmosphere). Under mild reaction conditions (60 degrees C, 5 h, 900 rpm, methanol-to-oil molar ratio of 12:1 and catalyst loading (CaO wt% to the oil) of 0.5%), the equilibrium ester content of 94.3% was obtained in the methanolysis of sunflower oil in a batch reactor. The catalyst remained sufficiently active in two consecutive cycles without any pretreatment. Mechanical erosion caused by stirring and massive deposition of organic molecules from the reaction mixture caused the decrease of catalytic activity while CaO leaching was negligible.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - Energy Conversion and Management
T1  - Synthesis and characterization of spherically-shaped CaO/gamma-Al2O3 catalyst and its application in biodiesel production
VL  - 144
SP  - 399
EP  - 413
DO  - 10.1016/j.enconman.2017.04.079
ER  - 

@article{
author = "Marinković, Dalibor and Avramović, Jelena M. and Stanković, Miroslav and Stamenković, Olivera and Jovanović, Dušan M. and Veljković, Vlada B.",
year = "2017",
abstract = "Loading CaO onto spherically-shaped gamma-Al2O3 support was applied for the preparation of a cost-effective and environmentally-friendly heterogeneous catalyst for biodiesel production. Physico-chemical, textural and morphological characterization was performed using optical emission spectroscopy (ICP OES), Hg-porosimetry, N-2 physisorption, scanning electron microscopy (FESEM), X-ray diffraction (XRPD), Fourier transform infrared spectroscopy (ATR FTIR) and Hammett indicators. The effects of catalyst preparation conditions (different precursor salts and calcination temperatures) on the catalyst activity, and the reaction conditions (methanol-to-oil molar ratio and catalyst loading) on the reaction rate and esters yield were studied. In addition, catalyst stability was investigated. The most active catalyst was derived from the nitrate precursor after calcination at 475 degrees C (inert atmosphere). Under mild reaction conditions (60 degrees C, 5 h, 900 rpm, methanol-to-oil molar ratio of 12:1 and catalyst loading (CaO wt% to the oil) of 0.5%), the equilibrium ester content of 94.3% was obtained in the methanolysis of sunflower oil in a batch reactor. The catalyst remained sufficiently active in two consecutive cycles without any pretreatment. Mechanical erosion caused by stirring and massive deposition of organic molecules from the reaction mixture caused the decrease of catalytic activity while CaO leaching was negligible.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "Energy Conversion and Management",
title = "Synthesis and characterization of spherically-shaped CaO/gamma-Al2O3 catalyst and its application in biodiesel production",
volume = "144",
pages = "399-413",
doi = "10.1016/j.enconman.2017.04.079"
}

Marinković, D., Avramović, J. M., Stanković, M., Stamenković, O., Jovanović, D. M.,& Veljković, V. B.. (2017). Synthesis and characterization of spherically-shaped CaO/gamma-Al2O3 catalyst and its application in biodiesel production. in Energy Conversion and Management
Oxford : Pergamon-Elsevier Science Ltd., 144, 399-413.
https://doi.org/10.1016/j.enconman.2017.04.079

Marinković D, Avramović JM, Stanković M, Stamenković O, Jovanović DM, Veljković VB. Synthesis and characterization of spherically-shaped CaO/gamma-Al2O3 catalyst and its application in biodiesel production. in Energy Conversion and Management. 2017;144:399-413.
doi:10.1016/j.enconman.2017.04.079 .

Marinković, Dalibor, Avramović, Jelena M., Stanković, Miroslav, Stamenković, Olivera, Jovanović, Dušan M., Veljković, Vlada B., "Synthesis and characterization of spherically-shaped CaO/gamma-Al2O3 catalyst and its application in biodiesel production" in Energy Conversion and Management, 144 (2017):399-413,
https://doi.org/10.1016/j.enconman.2017.04.079 . .