TY  - JOUR
AU  - Janković, Bojan
AU  - Manić, Nebojša
AU  - Popović, Mina
AU  - Cvetković, Slobodan
AU  - Dželetović, Željko
AU  - Stojiljković, Dragoslava
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5647
AB  - This work provides insight into possibilities of maximum utilization of C3-C4 energy crops for thermo-chemical conversion (slow pyrolysis) into high value biochemicals, platform chemicals, drop-in fuels and combustible gases, using coupled kinetic and thermodynamic analyses. In order to examine the kinetics of decomposition of lignocellulosic components, model-free and model-based methods faded from thermal analysis data were used. Thermodynamic compensation was used for explicatory of entropy controlled process, where conformational changes and chemical exchange directly affect the type and distribution of obtained pyrolytic products. It was shown that external variable (i.e. the heating rate/temperature) does not change either an entire reaction mechanism (mechanistic nature of MG and AD pyrolyses) or transition state, but it changes activation enthalpy and activation entropy which lead to differences in terms of heat energy consumption, pyrolysis favorability and thus rates of generation of activated complex among feedstocks. To investigate the interplay of catalysts (present in feedstocks as minerals) and reactants, selective energy transfer (SET) model was applied. The model showed an activity of catalyst with different outputs towards two reactants, lignin part of the structure in MG and 1,8-cineole in AD. It was shown that AD is more convenient for thermal conversion than MG, regarding to lower transformation energy requirement, higher reactivity, as well as much faster accumulation of products.
PB  - Elsevier B.V.
T2  - Industrial Crops and Products
T1  - Kinetic and thermodynamic compensation phenomena in C3 and C4 energy crops pyrolysis: Implications on reaction mechanisms and product distributions
VL  - 194
SP  - 116275
DO  - 10.1016/j.indcrop.2023.116275
ER  - 

@article{
author = "Janković, Bojan and Manić, Nebojša and Popović, Mina and Cvetković, Slobodan and Dželetović, Željko and Stojiljković, Dragoslava",
year = "2023",
abstract = "This work provides insight into possibilities of maximum utilization of C3-C4 energy crops for thermo-chemical conversion (slow pyrolysis) into high value biochemicals, platform chemicals, drop-in fuels and combustible gases, using coupled kinetic and thermodynamic analyses. In order to examine the kinetics of decomposition of lignocellulosic components, model-free and model-based methods faded from thermal analysis data were used. Thermodynamic compensation was used for explicatory of entropy controlled process, where conformational changes and chemical exchange directly affect the type and distribution of obtained pyrolytic products. It was shown that external variable (i.e. the heating rate/temperature) does not change either an entire reaction mechanism (mechanistic nature of MG and AD pyrolyses) or transition state, but it changes activation enthalpy and activation entropy which lead to differences in terms of heat energy consumption, pyrolysis favorability and thus rates of generation of activated complex among feedstocks. To investigate the interplay of catalysts (present in feedstocks as minerals) and reactants, selective energy transfer (SET) model was applied. The model showed an activity of catalyst with different outputs towards two reactants, lignin part of the structure in MG and 1,8-cineole in AD. It was shown that AD is more convenient for thermal conversion than MG, regarding to lower transformation energy requirement, higher reactivity, as well as much faster accumulation of products.",
publisher = "Elsevier B.V.",
journal = "Industrial Crops and Products",
title = "Kinetic and thermodynamic compensation phenomena in C3 and C4 energy crops pyrolysis: Implications on reaction mechanisms and product distributions",
volume = "194",
pages = "116275",
doi = "10.1016/j.indcrop.2023.116275"
}

Janković, B., Manić, N., Popović, M., Cvetković, S., Dželetović, Ž.,& Stojiljković, D.. (2023). Kinetic and thermodynamic compensation phenomena in C3 and C4 energy crops pyrolysis: Implications on reaction mechanisms and product distributions. in Industrial Crops and Products
Elsevier B.V.., 194, 116275.
https://doi.org/10.1016/j.indcrop.2023.116275

Janković B, Manić N, Popović M, Cvetković S, Dželetović Ž, Stojiljković D. Kinetic and thermodynamic compensation phenomena in C3 and C4 energy crops pyrolysis: Implications on reaction mechanisms and product distributions. in Industrial Crops and Products. 2023;194:116275.
doi:10.1016/j.indcrop.2023.116275 .

Janković, Bojan, Manić, Nebojša, Popović, Mina, Cvetković, Slobodan, Dželetović, Željko, Stojiljković, Dragoslava, "Kinetic and thermodynamic compensation phenomena in C3 and C4 energy crops pyrolysis: Implications on reaction mechanisms and product distributions" in Industrial Crops and Products, 194 (2023):116275,
https://doi.org/10.1016/j.indcrop.2023.116275 . .

TY  - JOUR
AU  - Cvetković, Olga
AU  - Pivić, Radmila
AU  - Dinić, Zoran
AU  - Maksimović, Jelena
AU  - Trifunović, Snežana
AU  - Dželetović, Željko
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1866
AB  - According to scientific community and professional specialists, urging necessity to increase capacity of sources of energy can be partially achieved by using biomass as a raw material. This approach is justified by both economic and ecological reasons. In this paper the results of chemical study of the biomass Miscanthus × giganteus Greef et Deu. cultivated in the Republic of Serbia in the experimental field of the Institute for Application of Nuclear Energy in Zemun were presented. Study of an amount of ashes, elemental analysis of the biomass, and calorific value of the biomass (both higher and lower), which are critical parameters when estimating the quality of a biofuel, points out the possibility of utilization of the miscantus biomass as a fuel. Samples of the plant material for this study were collected during two harvesting periods: in the fall, when the biological yield is the highest, and at the end of the winter, when a highest quality biomass with respect to the combustion is obtained do to a decrease in moisture content and remobilization of the macro- and micronutrients from the above-ground parts of the plants to the rhizomes. Values of the studied parameters indicate that biomass meets the 'green' energy requirements because the amounts of oxides of nitrogen and sulphur in the combustion products would not threaten current quality of the environment and the amount of carbon dioxide produced would be consumed in the process of photosynthesis. Results of the chemical analyses strongly suggest to a high potential of utilization of the miscantus biomass as a biofuel (renewable source of energy) to generate thermal energy.
AB  - Delimičan odgovor stručne i naučne javnosti na pitanje kako povećati kapacitete energetskih izvora je upotreba biomase kao sirovine, kako iz ekonomskih, tako i iz ekoloških razloga. U ovom radu su prikazani rezultati fizičko-hemijskih ispitivanja biomase miskantusa (Miscanthus × giganteus Greef et Deu.), gajenog na teritoriji Republike Srbije, oglednom polju Instituta za primenu nuklearne energije, Zemun. Ispitivanjem količine pepela, elementarnog sastava biomase i kalorične vrednosti biomase (donje i gornje), koji su presudni za procenu kvaliteta biogoriva, ukazano je na mogućnost eksploatacije biomase miskantusa kao biogoriva. Prikupljanje uzoraka biljnog materijala za ovo istraživanje izvršeno je u dva žetvena roka: u jesen - vreme maksimuma biološkog prinosa i krajem zime, kada se dobija kvalitetnija biomasa za sagorevanje usled smanjenja sadržaja vlage i remobilizacije makro- i mikrohraniva iz nadzemnih delova rizoma. Vrednosti ispitivanih parametara pokazuju da biomasa ispunjava zahteve 'zelene' energije, jer produkti sagorevanja biomase svojom količinom (oksidi N i S) ne bi ugrožavali postojeći kvalitet životne sredine, a količina nastalog ugljenik (IV) - oksida ne bi predstavljala ekološki problem, jer bi se dalje uključila u proces fotosinteze. Rezultati hemijskih analiza argumentovano ukazuju na veliki potencijal upotrebe biomase miskantusa kao biogoriva (obnovljivog izvora energije) u proizvodnji toplotne energije.
PB  - Belgrade, Serbia : Engineering Society for Corrosion
T2  - Zaštita materijala
T1  - Chemical investigation of miscanthus × giganteus Greef et Deu. Cultivated in Serbia: A potential renewable source of energy
T1  - Hemijska ispitivanja miskantusa gajenog u Srbiji - potencijalni obnovljiv izvor energije
VL  - 57
IS  - 3
SP  - 412
EP  - 417
DO  - 10.5937/ZasMat1603412C
ER  - 

@article{
author = "Cvetković, Olga and Pivić, Radmila and Dinić, Zoran and Maksimović, Jelena and Trifunović, Snežana and Dželetović, Željko",
year = "2016",
abstract = "According to scientific community and professional specialists, urging necessity to increase capacity of sources of energy can be partially achieved by using biomass as a raw material. This approach is justified by both economic and ecological reasons. In this paper the results of chemical study of the biomass Miscanthus × giganteus Greef et Deu. cultivated in the Republic of Serbia in the experimental field of the Institute for Application of Nuclear Energy in Zemun were presented. Study of an amount of ashes, elemental analysis of the biomass, and calorific value of the biomass (both higher and lower), which are critical parameters when estimating the quality of a biofuel, points out the possibility of utilization of the miscantus biomass as a fuel. Samples of the plant material for this study were collected during two harvesting periods: in the fall, when the biological yield is the highest, and at the end of the winter, when a highest quality biomass with respect to the combustion is obtained do to a decrease in moisture content and remobilization of the macro- and micronutrients from the above-ground parts of the plants to the rhizomes. Values of the studied parameters indicate that biomass meets the 'green' energy requirements because the amounts of oxides of nitrogen and sulphur in the combustion products would not threaten current quality of the environment and the amount of carbon dioxide produced would be consumed in the process of photosynthesis. Results of the chemical analyses strongly suggest to a high potential of utilization of the miscantus biomass as a biofuel (renewable source of energy) to generate thermal energy., Delimičan odgovor stručne i naučne javnosti na pitanje kako povećati kapacitete energetskih izvora je upotreba biomase kao sirovine, kako iz ekonomskih, tako i iz ekoloških razloga. U ovom radu su prikazani rezultati fizičko-hemijskih ispitivanja biomase miskantusa (Miscanthus × giganteus Greef et Deu.), gajenog na teritoriji Republike Srbije, oglednom polju Instituta za primenu nuklearne energije, Zemun. Ispitivanjem količine pepela, elementarnog sastava biomase i kalorične vrednosti biomase (donje i gornje), koji su presudni za procenu kvaliteta biogoriva, ukazano je na mogućnost eksploatacije biomase miskantusa kao biogoriva. Prikupljanje uzoraka biljnog materijala za ovo istraživanje izvršeno je u dva žetvena roka: u jesen - vreme maksimuma biološkog prinosa i krajem zime, kada se dobija kvalitetnija biomasa za sagorevanje usled smanjenja sadržaja vlage i remobilizacije makro- i mikrohraniva iz nadzemnih delova rizoma. Vrednosti ispitivanih parametara pokazuju da biomasa ispunjava zahteve 'zelene' energije, jer produkti sagorevanja biomase svojom količinom (oksidi N i S) ne bi ugrožavali postojeći kvalitet životne sredine, a količina nastalog ugljenik (IV) - oksida ne bi predstavljala ekološki problem, jer bi se dalje uključila u proces fotosinteze. Rezultati hemijskih analiza argumentovano ukazuju na veliki potencijal upotrebe biomase miskantusa kao biogoriva (obnovljivog izvora energije) u proizvodnji toplotne energije.",
publisher = "Belgrade, Serbia : Engineering Society for Corrosion",
journal = "Zaštita materijala",
title = "Chemical investigation of miscanthus × giganteus Greef et Deu. Cultivated in Serbia: A potential renewable source of energy, Hemijska ispitivanja miskantusa gajenog u Srbiji - potencijalni obnovljiv izvor energije",
volume = "57",
number = "3",
pages = "412-417",
doi = "10.5937/ZasMat1603412C"
}

Cvetković, O., Pivić, R., Dinić, Z., Maksimović, J., Trifunović, S.,& Dželetović, Ž.. (2016). Chemical investigation of miscanthus × giganteus Greef et Deu. Cultivated in Serbia: A potential renewable source of energy. in Zaštita materijala
Belgrade, Serbia : Engineering Society for Corrosion., 57(3), 412-417.
https://doi.org/10.5937/ZasMat1603412C

Cvetković O, Pivić R, Dinić Z, Maksimović J, Trifunović S, Dželetović Ž. Chemical investigation of miscanthus × giganteus Greef et Deu. Cultivated in Serbia: A potential renewable source of energy. in Zaštita materijala. 2016;57(3):412-417.
doi:10.5937/ZasMat1603412C .

Cvetković, Olga, Pivić, Radmila, Dinić, Zoran, Maksimović, Jelena, Trifunović, Snežana, Dželetović, Željko, "Chemical investigation of miscanthus × giganteus Greef et Deu. Cultivated in Serbia: A potential renewable source of energy" in Zaštita materijala, 57, no. 3 (2016):412-417,
https://doi.org/10.5937/ZasMat1603412C . .