TY  - CONF
AU  - Pantović Spajić, Katarina
AU  - Pantović Pavlović, Marijana
AU  - Stopić, Srećko
AU  - Gjumišev, Đorđe
AU  - Marković, Branislav
AU  - Pavlović, Miroslav
AU  - Stojanović, Ksenija
PY  - 2024
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7675
AB  - This study investigates the electrochemical desulfurization of sulfur-rich subbituminous coal (6.96 wt.%) from the Bogovina Basin using graphite and dimensionally stable anode (DSA) electrodes. The objective was to evaluate and compare the efficacy of these electrodes under varying thermal conditions to determine the optimal operational parameters that balance desulfurization efficiency with energy consumption. Electrochemical assessments were conducted through linear sweep voltammetry (LSV) to derive polarization curves and calculate activation energies, reflecting the intrinsic energy barriers of the desulfurization reactions. These tests were performed across a temperature range from 30°C to 70°C, providing insight into the thermally activated nature of these processes. The results demonstrated that the DSA electrodes outperformed the graphite electrodes in several key areas. Notably, DSA electrodes exhibited higher current densities at equivalent temperatures and potentials, indicating a more robust electrochemical activity conducive to higher desulfurization rates. Moreover, activation energy analysis revealed that DSA electrodes operate with significantly lower energy barriers, facilitating easier and more efficient reaction initiations. Energy consumption metrics were critical in evaluating the operational costs associated with each electrode type. The DSA electrodes were found to consume less energy per kilogram of sulfur removed, particularly at an optimal temperature of 50°C, which was identified as the most energy-efficient operational point. At this temperature, the DSA electrodes achieved peak desulfurization efficiency with the most favorable balance between energy input and desulfurization output. The study substantiates the superiority of DSA electrodes over traditional graphite electrodes for coal desulfurization processes, particularly at the optimal operational temperature of 50°C. The findings highlight significant potential for enhancing the sustainability and cost-effectiveness of coal desulfurization technologies, suggesting a paradigm shift towards the adoption of DSA electrodes in industrial applications to achieve more efficient and environmentally friendly outcomes.
PB  - Serbian Society of Corrosion and Materials Protection UISKOZAM
C3  - Proceedings, XXV YuCorr, International conference, Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection, May 28-31, 2024, Divčibare, Serbia
T1  - Comparative Study of Activation Energy and Desulfurization Efficiency of Coal in Graphite and Dimensionally Stable Anode (DSA) Electrodes
SP  - 105
EP  - 105
UR  - https://hdl.handle.net/21.15107/rcub_cer_7675
ER  - 

@conference{
author = "Pantović Spajić, Katarina and Pantović Pavlović, Marijana and Stopić, Srećko and Gjumišev, Đorđe and Marković, Branislav and Pavlović, Miroslav and Stojanović, Ksenija",
year = "2024",
abstract = "This study investigates the electrochemical desulfurization of sulfur-rich subbituminous coal (6.96 wt.%) from the Bogovina Basin using graphite and dimensionally stable anode (DSA) electrodes. The objective was to evaluate and compare the efficacy of these electrodes under varying thermal conditions to determine the optimal operational parameters that balance desulfurization efficiency with energy consumption. Electrochemical assessments were conducted through linear sweep voltammetry (LSV) to derive polarization curves and calculate activation energies, reflecting the intrinsic energy barriers of the desulfurization reactions. These tests were performed across a temperature range from 30°C to 70°C, providing insight into the thermally activated nature of these processes. The results demonstrated that the DSA electrodes outperformed the graphite electrodes in several key areas. Notably, DSA electrodes exhibited higher current densities at equivalent temperatures and potentials, indicating a more robust electrochemical activity conducive to higher desulfurization rates. Moreover, activation energy analysis revealed that DSA electrodes operate with significantly lower energy barriers, facilitating easier and more efficient reaction initiations. Energy consumption metrics were critical in evaluating the operational costs associated with each electrode type. The DSA electrodes were found to consume less energy per kilogram of sulfur removed, particularly at an optimal temperature of 50°C, which was identified as the most energy-efficient operational point. At this temperature, the DSA electrodes achieved peak desulfurization efficiency with the most favorable balance between energy input and desulfurization output. The study substantiates the superiority of DSA electrodes over traditional graphite electrodes for coal desulfurization processes, particularly at the optimal operational temperature of 50°C. The findings highlight significant potential for enhancing the sustainability and cost-effectiveness of coal desulfurization technologies, suggesting a paradigm shift towards the adoption of DSA electrodes in industrial applications to achieve more efficient and environmentally friendly outcomes.",
publisher = "Serbian Society of Corrosion and Materials Protection UISKOZAM",
journal = "Proceedings, XXV YuCorr, International conference, Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection, May 28-31, 2024, Divčibare, Serbia",
title = "Comparative Study of Activation Energy and Desulfurization Efficiency of Coal in Graphite and Dimensionally Stable Anode (DSA) Electrodes",
pages = "105-105",
url = "https://hdl.handle.net/21.15107/rcub_cer_7675"
}

Pantović Spajić, K., Pantović Pavlović, M., Stopić, S., Gjumišev, Đ., Marković, B., Pavlović, M.,& Stojanović, K.. (2024). Comparative Study of Activation Energy and Desulfurization Efficiency of Coal in Graphite and Dimensionally Stable Anode (DSA) Electrodes. in Proceedings, XXV YuCorr, International conference, Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection, May 28-31, 2024, Divčibare, Serbia
Serbian Society of Corrosion and Materials Protection UISKOZAM., 105-105.
https://hdl.handle.net/21.15107/rcub_cer_7675

Pantović Spajić K, Pantović Pavlović M, Stopić S, Gjumišev Đ, Marković B, Pavlović M, Stojanović K. Comparative Study of Activation Energy and Desulfurization Efficiency of Coal in Graphite and Dimensionally Stable Anode (DSA) Electrodes. in Proceedings, XXV YuCorr, International conference, Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection, May 28-31, 2024, Divčibare, Serbia. 2024;:105-105.
https://hdl.handle.net/21.15107/rcub_cer_7675 .

Pantović Spajić, Katarina, Pantović Pavlović, Marijana, Stopić, Srećko, Gjumišev, Đorđe, Marković, Branislav, Pavlović, Miroslav, Stojanović, Ksenija, "Comparative Study of Activation Energy and Desulfurization Efficiency of Coal in Graphite and Dimensionally Stable Anode (DSA) Electrodes" in Proceedings, XXV YuCorr, International conference, Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection, May 28-31, 2024, Divčibare, Serbia (2024):105-105,
https://hdl.handle.net/21.15107/rcub_cer_7675 .

TY  - CONF
AU  - Pantović Pavlović, Marijana
AU  - Božić, Katarina
AU  - Gjumišev, Đorđe
AU  - Stopić, Srećko
AU  - Birich, Alexander
AU  - Friedrich, Bernd
AU  - Pavlović, Miroslav
PY  - 2024
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7657
AB  - The paper investigates the synthesis and characterization of potential catalysts for oxygen reduction (ORR) and evolution (OER) reactions utilizing Ce, Y, Yb and Co. Employing the ultrasonic spray pyrolysis (USP) synthesis method, multivalent oxides were successfully synthesized from metal salts precursors, exhibiting promising catalytic properties for ORR. The research outlines experiments: microwave synthesis, IrO2 deposition and various techniques and electrochemical analyses (XRD, SEM/EDS, CV, LSV, PEIS, C-DC), illustrating the performance of multivalent oxides for OER. Additionally, the study emphasizes the significance of rare earth elements (REEs) in advanced technology manufacturing and investigates the potential of coal fly ash (CFA) as a resource for REE extraction. The paper proposes innovative approaches for REE recovery from CFA waste, aligning with circular economy principles and sustainable resource management strategies. It underscores the importance of local extractive technologies to mitigate transportation costs and environmental impacts, thereby contributing to regional resource independence and environmental sustainability. This research aims to provide valuable insights into the development of efficient catalysts for ORR and OER, fostering the transition towards a more sustainable and prosperous future in energy storage and conversion technologies. The results demonstrate the superior catalytic activity of the synthesized multivalent oxides compared to conventional catalysts, highlighting their potential for practical applications in rechargeable metal-air batteries and fuel cells.
PB  - University Ss. Cyril and Methodius in Skopje, Faculty of Technology and Metallurgy
C3  - 1st Conference for Green Engineering, Sustainable Materials and Technologies for Circular Economy, GREEN CIRC 2024, Book of Abstracts, April 22-23, Skopje, North Macedonia
T1  - Advancements in multimetal multuvalent oxides for sustainable energy storage and conversion: a focus on oxygen reduction and evolution reactions
SP  - 8
EP  - 8
UR  - https://hdl.handle.net/21.15107/rcub_cer_7657
ER  - 

@conference{
author = "Pantović Pavlović, Marijana and Božić, Katarina and Gjumišev, Đorđe and Stopić, Srećko and Birich, Alexander and Friedrich, Bernd and Pavlović, Miroslav",
year = "2024",
abstract = "The paper investigates the synthesis and characterization of potential catalysts for oxygen reduction (ORR) and evolution (OER) reactions utilizing Ce, Y, Yb and Co. Employing the ultrasonic spray pyrolysis (USP) synthesis method, multivalent oxides were successfully synthesized from metal salts precursors, exhibiting promising catalytic properties for ORR. The research outlines experiments: microwave synthesis, IrO2 deposition and various techniques and electrochemical analyses (XRD, SEM/EDS, CV, LSV, PEIS, C-DC), illustrating the performance of multivalent oxides for OER. Additionally, the study emphasizes the significance of rare earth elements (REEs) in advanced technology manufacturing and investigates the potential of coal fly ash (CFA) as a resource for REE extraction. The paper proposes innovative approaches for REE recovery from CFA waste, aligning with circular economy principles and sustainable resource management strategies. It underscores the importance of local extractive technologies to mitigate transportation costs and environmental impacts, thereby contributing to regional resource independence and environmental sustainability. This research aims to provide valuable insights into the development of efficient catalysts for ORR and OER, fostering the transition towards a more sustainable and prosperous future in energy storage and conversion technologies. The results demonstrate the superior catalytic activity of the synthesized multivalent oxides compared to conventional catalysts, highlighting their potential for practical applications in rechargeable metal-air batteries and fuel cells.",
publisher = "University Ss. Cyril and Methodius in Skopje, Faculty of Technology and Metallurgy",
journal = "1st Conference for Green Engineering, Sustainable Materials and Technologies for Circular Economy, GREEN CIRC 2024, Book of Abstracts, April 22-23, Skopje, North Macedonia",
title = "Advancements in multimetal multuvalent oxides for sustainable energy storage and conversion: a focus on oxygen reduction and evolution reactions",
pages = "8-8",
url = "https://hdl.handle.net/21.15107/rcub_cer_7657"
}

Pantović Pavlović, M., Božić, K., Gjumišev, Đ., Stopić, S., Birich, A., Friedrich, B.,& Pavlović, M.. (2024). Advancements in multimetal multuvalent oxides for sustainable energy storage and conversion: a focus on oxygen reduction and evolution reactions. in 1st Conference for Green Engineering, Sustainable Materials and Technologies for Circular Economy, GREEN CIRC 2024, Book of Abstracts, April 22-23, Skopje, North Macedonia
University Ss. Cyril and Methodius in Skopje, Faculty of Technology and Metallurgy., 8-8.
https://hdl.handle.net/21.15107/rcub_cer_7657

Pantović Pavlović M, Božić K, Gjumišev Đ, Stopić S, Birich A, Friedrich B, Pavlović M. Advancements in multimetal multuvalent oxides for sustainable energy storage and conversion: a focus on oxygen reduction and evolution reactions. in 1st Conference for Green Engineering, Sustainable Materials and Technologies for Circular Economy, GREEN CIRC 2024, Book of Abstracts, April 22-23, Skopje, North Macedonia. 2024;:8-8.
https://hdl.handle.net/21.15107/rcub_cer_7657 .

Pantović Pavlović, Marijana, Božić, Katarina, Gjumišev, Đorđe, Stopić, Srećko, Birich, Alexander, Friedrich, Bernd, Pavlović, Miroslav, "Advancements in multimetal multuvalent oxides for sustainable energy storage and conversion: a focus on oxygen reduction and evolution reactions" in 1st Conference for Green Engineering, Sustainable Materials and Technologies for Circular Economy, GREEN CIRC 2024, Book of Abstracts, April 22-23, Skopje, North Macedonia (2024):8-8,
https://hdl.handle.net/21.15107/rcub_cer_7657 .

TY  - CONF
AU  - Pantović Spajić, Katarina
AU  - Pantović Pavlović, Marijana
AU  - Božić, Katarina
AU  - Gjumišev, Đorđe
AU  - Panić, Vladimir
AU  - Pavlović, Miroslav
AU  - Stojanović, Ksenija
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6555
AB  - The removal of organic and inorganic sulfur from the Bogovina Basin subbituminous coal by electrochemical redox reactions was performed. The effect of presence of active bromine species on the desulfurization process was monitored. The desulfurization was performed in inorganic acidic solutions that contained different bromide concentrations and in pure acid solution. To 
determine the optimal conditions for the desulfurization process, polarization curves were 
recorded in three different electrolytes: 0.1 M H2SO4, 0.1 M H2SO4 + 0.01 M KBr, and 0.1 M 
H2SO4 + 0.1 M KBr using graphite and dimensionally stable anode (DSA) electrodes as the 
anode, while in all cases stainless steel S31603 electrode was used as cathode. By analyzing the 
results obtained from the polarization curves, 0.1 M H2SO4 and 0.1 M H2SO4 + 0.1 M KBr were 
chosen as the most suitable electrolytes. Also, it was found that the DSA anode showed better 
results in terms of energy efficiency of the process compared to the graphite anode and therefore
it was selected for the coal desulfurization process. It is considered that finely suspended coal 
particles in an electrolyte can behave according to bipolar electrochemistry. Coal was treated 
for 4 hours in two selected electrolytes. The suspension was sampled at different times up to 240 
min from the beginning of the process. Sulfur content in coal was determined by elemental 
analysis. The results showed that the sulfur content decreases faster in the case of the electrolyte 
containing KBr, i.e. that the desulfurization effect is significantly better than in the case of the 
system containing only H2SO4. It can be concluded that active bromine species accelerate the 
desulfurization process and thus improve energy efficiency.
PB  - Zvornik : Faculty of Technology
C3  - Book of Abstracts - VIII International Congress Engineering, Environment and Materials in Process Industry, March 20-23, 2023, Jahorina - Republic of Srpska, Bosnia and Herzegovina
T1  - Study of the effects of active bromine species presence in electrolytic desulfurization of subbituminous coal
SP  - 64
EP  - 64
UR  - https://hdl.handle.net/21.15107/rcub_cer_6555
ER  - 

@conference{
author = "Pantović Spajić, Katarina and Pantović Pavlović, Marijana and Božić, Katarina and Gjumišev, Đorđe and Panić, Vladimir and Pavlović, Miroslav and Stojanović, Ksenija",
year = "2023",
abstract = "The removal of organic and inorganic sulfur from the Bogovina Basin subbituminous coal by electrochemical redox reactions was performed. The effect of presence of active bromine species on the desulfurization process was monitored. The desulfurization was performed in inorganic acidic solutions that contained different bromide concentrations and in pure acid solution. To 
determine the optimal conditions for the desulfurization process, polarization curves were 
recorded in three different electrolytes: 0.1 M H2SO4, 0.1 M H2SO4 + 0.01 M KBr, and 0.1 M 
H2SO4 + 0.1 M KBr using graphite and dimensionally stable anode (DSA) electrodes as the 
anode, while in all cases stainless steel S31603 electrode was used as cathode. By analyzing the 
results obtained from the polarization curves, 0.1 M H2SO4 and 0.1 M H2SO4 + 0.1 M KBr were 
chosen as the most suitable electrolytes. Also, it was found that the DSA anode showed better 
results in terms of energy efficiency of the process compared to the graphite anode and therefore
it was selected for the coal desulfurization process. It is considered that finely suspended coal 
particles in an electrolyte can behave according to bipolar electrochemistry. Coal was treated 
for 4 hours in two selected electrolytes. The suspension was sampled at different times up to 240 
min from the beginning of the process. Sulfur content in coal was determined by elemental 
analysis. The results showed that the sulfur content decreases faster in the case of the electrolyte 
containing KBr, i.e. that the desulfurization effect is significantly better than in the case of the 
system containing only H2SO4. It can be concluded that active bromine species accelerate the 
desulfurization process and thus improve energy efficiency.",
publisher = "Zvornik : Faculty of Technology",
journal = "Book of Abstracts - VIII International Congress Engineering, Environment and Materials in Process Industry, March 20-23, 2023, Jahorina - Republic of Srpska, Bosnia and Herzegovina",
title = "Study of the effects of active bromine species presence in electrolytic desulfurization of subbituminous coal",
pages = "64-64",
url = "https://hdl.handle.net/21.15107/rcub_cer_6555"
}

Pantović Spajić, K., Pantović Pavlović, M., Božić, K., Gjumišev, Đ., Panić, V., Pavlović, M.,& Stojanović, K.. (2023). Study of the effects of active bromine species presence in electrolytic desulfurization of subbituminous coal. in Book of Abstracts - VIII International Congress Engineering, Environment and Materials in Process Industry, March 20-23, 2023, Jahorina - Republic of Srpska, Bosnia and Herzegovina
Zvornik : Faculty of Technology., 64-64.
https://hdl.handle.net/21.15107/rcub_cer_6555

Pantović Spajić K, Pantović Pavlović M, Božić K, Gjumišev Đ, Panić V, Pavlović M, Stojanović K. Study of the effects of active bromine species presence in electrolytic desulfurization of subbituminous coal. in Book of Abstracts - VIII International Congress Engineering, Environment and Materials in Process Industry, March 20-23, 2023, Jahorina - Republic of Srpska, Bosnia and Herzegovina. 2023;:64-64.
https://hdl.handle.net/21.15107/rcub_cer_6555 .

Pantović Spajić, Katarina, Pantović Pavlović, Marijana, Božić, Katarina, Gjumišev, Đorđe, Panić, Vladimir, Pavlović, Miroslav, Stojanović, Ksenija, "Study of the effects of active bromine species presence in electrolytic desulfurization of subbituminous coal" in Book of Abstracts - VIII International Congress Engineering, Environment and Materials in Process Industry, March 20-23, 2023, Jahorina - Republic of Srpska, Bosnia and Herzegovina (2023):64-64,
https://hdl.handle.net/21.15107/rcub_cer_6555 .

TY  - CONF
AU  - Božić, Katarina
AU  - Pavlović, Miroslav
AU  - Gjumišev, Đorđe
AU  - Veljović, Đorđe
AU  - Pantović Pavlović, Marijana
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6506
AB  - This study focused on investigating the effects of voltage and deposition time on the formation and morphology of hydroxyapatite/titanium oxide coatings, which were obtained using an in-situ synthesis process. The coatings were prepared under various voltage conditions and deposition times to analyze their characteristics. To evaluate the morphology of the coatings, optical microscopy and field emission scanning electron microscopy (FE-SEM) techniques were employed. Additionally, Fourier transform infrared spectroscopy (FTIR) was utilized to confirm the presence of hydroxyapatite coatings on the substrate. The results revealed that an increase in voltage led to a more uniform coating. The voltage parameter had a significant impact on the morphology of the initial hydroxyapatite powder, causing the agglomerates to disperse and resulting in smaller particle sizes within the coating. Furthermore, the FTIR analysis provided solid evidence of the presence of hydroxyapatite within the obtained coatings. These findings emphasize the importance of voltage control and deposition time in the in-situ synthesis process for achieving desirable hydroxyapatite/titanium oxide coatings. Understanding the influence of these parameters on coating formation and morphology can contribute to the development of improved techniques for biomedical applications, such as enhanced osseointegration in orthopedic and dental implants.
PB  - Belgrade : Serbian Society of Corrosion and Materials Protection UISKOZAM / Beograd : Udruženje inženjera Srbije za koroziju i zaštitu materijala UISKOZAM
C3  - Proceedings - XXIV YuCorr International Conference, Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection, May 28-31, 2023, Divčibare, Serbia
T1  - The influence of the voltage on formation and morphology of hydroxyapatite/titanium composite coatings
SP  - 95
EP  - 95
UR  - https://hdl.handle.net/21.15107/rcub_cer_6506
ER  - 

@conference{
author = "Božić, Katarina and Pavlović, Miroslav and Gjumišev, Đorđe and Veljović, Đorđe and Pantović Pavlović, Marijana",
year = "2023",
abstract = "This study focused on investigating the effects of voltage and deposition time on the formation and morphology of hydroxyapatite/titanium oxide coatings, which were obtained using an in-situ synthesis process. The coatings were prepared under various voltage conditions and deposition times to analyze their characteristics. To evaluate the morphology of the coatings, optical microscopy and field emission scanning electron microscopy (FE-SEM) techniques were employed. Additionally, Fourier transform infrared spectroscopy (FTIR) was utilized to confirm the presence of hydroxyapatite coatings on the substrate. The results revealed that an increase in voltage led to a more uniform coating. The voltage parameter had a significant impact on the morphology of the initial hydroxyapatite powder, causing the agglomerates to disperse and resulting in smaller particle sizes within the coating. Furthermore, the FTIR analysis provided solid evidence of the presence of hydroxyapatite within the obtained coatings. These findings emphasize the importance of voltage control and deposition time in the in-situ synthesis process for achieving desirable hydroxyapatite/titanium oxide coatings. Understanding the influence of these parameters on coating formation and morphology can contribute to the development of improved techniques for biomedical applications, such as enhanced osseointegration in orthopedic and dental implants.",
publisher = "Belgrade : Serbian Society of Corrosion and Materials Protection UISKOZAM / Beograd : Udruženje inženjera Srbije za koroziju i zaštitu materijala UISKOZAM",
journal = "Proceedings - XXIV YuCorr International Conference, Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection, May 28-31, 2023, Divčibare, Serbia",
title = "The influence of the voltage on formation and morphology of hydroxyapatite/titanium composite coatings",
pages = "95-95",
url = "https://hdl.handle.net/21.15107/rcub_cer_6506"
}

Božić, K., Pavlović, M., Gjumišev, Đ., Veljović, Đ.,& Pantović Pavlović, M.. (2023). The influence of the voltage on formation and morphology of hydroxyapatite/titanium composite coatings. in Proceedings - XXIV YuCorr International Conference, Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection, May 28-31, 2023, Divčibare, Serbia
Belgrade : Serbian Society of Corrosion and Materials Protection UISKOZAM / Beograd : Udruženje inženjera Srbije za koroziju i zaštitu materijala UISKOZAM., 95-95.
https://hdl.handle.net/21.15107/rcub_cer_6506

Božić K, Pavlović M, Gjumišev Đ, Veljović Đ, Pantović Pavlović M. The influence of the voltage on formation and morphology of hydroxyapatite/titanium composite coatings. in Proceedings - XXIV YuCorr International Conference, Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection, May 28-31, 2023, Divčibare, Serbia. 2023;:95-95.
https://hdl.handle.net/21.15107/rcub_cer_6506 .

Božić, Katarina, Pavlović, Miroslav, Gjumišev, Đorđe, Veljović, Đorđe, Pantović Pavlović, Marijana, "The influence of the voltage on formation and morphology of hydroxyapatite/titanium composite coatings" in Proceedings - XXIV YuCorr International Conference, Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection, May 28-31, 2023, Divčibare, Serbia (2023):95-95,
https://hdl.handle.net/21.15107/rcub_cer_6506 .