TY  - CONF
AU  - Pavlović, Stefan
AU  - Milovanović, Biljana
AU  - Paunović, Anđela
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3779
AB  - Modified highly active CaO catalyst (ESCHC-600) derived from waste chicken eggshells were prepared and used in the transesterification of sunflower oil. Eggshells were subjected to calcination-hydration-calcination (CHC) cycles described in detail previously [1]. After CHC treatments, highly active CaO was obtained, which indicates its great potential for biodiesel synthesis. The transesterification reaction was carried out in a batch reactor at 60 ºC, methanol to oil molar ratio of 12:1, and different catalyst concentrations ranging from 2 to 8 wt%. Fatty acid methyl esters (FAMEs) content was determined by the HPLC analytical technique. The highest triacylglycerols (TAGs) conversion to FAMEs was achieved at a catalyst loading of 4 wt% (Fig. 1a). A further increase in catalyst loading (> 4 wt%) led to a decrease in TAGs conversion. The higher catalyst loadings (6 and 8 wt%) limited mass transfer of the TAGs and reaction products (FAMEs, DAGs and MAGs) due to the higher reaction mixture density and viscosity of the complex multiphase system. Compared to raw eggshell calcined at 900 ºC (ES-900) (Fig. 1b), the synthesized ESCHC-600 catalyst showed a higher activity, which could be attributed to a more favourable pore structure of CHC treated catalyst and better availability of the active sites.
PB  - Belgrade : Serbian Chemical Society
C3  - Book of abstracts - Seventh Conference of the Young Chemists of Serbia
T1  - Modified eggshell catalyst for transesterification of sunflower oil: The effects of catalyst loading on FAMEs content
UR  - https://hdl.handle.net/21.15107/rcub_cer_3779
ER  - 

@conference{
author = "Pavlović, Stefan and Milovanović, Biljana and Paunović, Anđela",
year = "2019",
abstract = "Modified highly active CaO catalyst (ESCHC-600) derived from waste chicken eggshells were prepared and used in the transesterification of sunflower oil. Eggshells were subjected to calcination-hydration-calcination (CHC) cycles described in detail previously [1]. After CHC treatments, highly active CaO was obtained, which indicates its great potential for biodiesel synthesis. The transesterification reaction was carried out in a batch reactor at 60 ºC, methanol to oil molar ratio of 12:1, and different catalyst concentrations ranging from 2 to 8 wt%. Fatty acid methyl esters (FAMEs) content was determined by the HPLC analytical technique. The highest triacylglycerols (TAGs) conversion to FAMEs was achieved at a catalyst loading of 4 wt% (Fig. 1a). A further increase in catalyst loading (> 4 wt%) led to a decrease in TAGs conversion. The higher catalyst loadings (6 and 8 wt%) limited mass transfer of the TAGs and reaction products (FAMEs, DAGs and MAGs) due to the higher reaction mixture density and viscosity of the complex multiphase system. Compared to raw eggshell calcined at 900 ºC (ES-900) (Fig. 1b), the synthesized ESCHC-600 catalyst showed a higher activity, which could be attributed to a more favourable pore structure of CHC treated catalyst and better availability of the active sites.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Book of abstracts - Seventh Conference of the Young Chemists of Serbia",
title = "Modified eggshell catalyst for transesterification of sunflower oil: The effects of catalyst loading on FAMEs content",
url = "https://hdl.handle.net/21.15107/rcub_cer_3779"
}

Pavlović, S., Milovanović, B.,& Paunović, A.. (2019). Modified eggshell catalyst for transesterification of sunflower oil: The effects of catalyst loading on FAMEs content. in Book of abstracts - Seventh Conference of the Young Chemists of Serbia
Belgrade : Serbian Chemical Society..
https://hdl.handle.net/21.15107/rcub_cer_3779

Pavlović S, Milovanović B, Paunović A. Modified eggshell catalyst for transesterification of sunflower oil: The effects of catalyst loading on FAMEs content. in Book of abstracts - Seventh Conference of the Young Chemists of Serbia. 2019;.
https://hdl.handle.net/21.15107/rcub_cer_3779 .

Pavlović, Stefan, Milovanović, Biljana, Paunović, Anđela, "Modified eggshell catalyst for transesterification of sunflower oil: The effects of catalyst loading on FAMEs content" in Book of abstracts - Seventh Conference of the Young Chemists of Serbia (2019),
https://hdl.handle.net/21.15107/rcub_cer_3779 .

TY  - CONF
AU  - Paunović, Anđela
AU  - Pavlović, Stefan
AU  - Marinković, Dalibor
AU  - Mojović, Ljiljana
PY  - 2019
UR  - http://www.kmhem.net/aec_events/sedma-konferencija-mladih-hemicara-srbije/
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3748
AB  - The green CaO/Zeolite catalyst for methanolysis of fatty oils was synthesized entirely from the waste materials. CaO derived from chicken eggshell was loaded onto fly ashbased zeolite catalyst carrier by the wet impregnation method using an alcohol solution. The effect of thermal activation at different temperatures ranging from 450 to 600 °C on catalytic activity was studied. The precursor and catalyst samples were characterized by XRD, FTIR, SEM, and Hg-porosimetry techniques. The catalytic tests were performed in a stirred batch reactor at the following reaction conditions: 60 °C - reaction temperature, 12:1 - methanol/oil molar ratio, and 4 wt% - catalyst concentration. The obtained results showed that the synthesized CaO/Zeolite catalyst has preserved alumosilicate framework-cancrinite type [1], with uniformly distributed calcium oxide (CaO) on its surface (Fig. 1c). It is shown that the catalyst sample calcinated at 550 °C exhibited the highest FAME content of 96.46%, which was achieved in 2 h (Fig. 2). Increasing temperature of calcination above 550 °C led to the formation of inactive calcium alumosilicate forms causing a decrease in the FAME content.
PB  - Belgrade : Serbian Chemical Society
C3  - Book of abstracts - Seventh Conference of the Young Chemists of Serbia
T1  - Biodiesel synthesis over green catalyst: The effect of thermal treatment of CaO/Zeolite precursor on catalytic activity
SP  - 101
EP  - 101
UR  - https://hdl.handle.net/21.15107/rcub_cer_3748
ER  - 

@conference{
author = "Paunović, Anđela and Pavlović, Stefan and Marinković, Dalibor and Mojović, Ljiljana",
year = "2019",
abstract = "The green CaO/Zeolite catalyst for methanolysis of fatty oils was synthesized entirely from the waste materials. CaO derived from chicken eggshell was loaded onto fly ashbased zeolite catalyst carrier by the wet impregnation method using an alcohol solution. The effect of thermal activation at different temperatures ranging from 450 to 600 °C on catalytic activity was studied. The precursor and catalyst samples were characterized by XRD, FTIR, SEM, and Hg-porosimetry techniques. The catalytic tests were performed in a stirred batch reactor at the following reaction conditions: 60 °C - reaction temperature, 12:1 - methanol/oil molar ratio, and 4 wt% - catalyst concentration. The obtained results showed that the synthesized CaO/Zeolite catalyst has preserved alumosilicate framework-cancrinite type [1], with uniformly distributed calcium oxide (CaO) on its surface (Fig. 1c). It is shown that the catalyst sample calcinated at 550 °C exhibited the highest FAME content of 96.46%, which was achieved in 2 h (Fig. 2). Increasing temperature of calcination above 550 °C led to the formation of inactive calcium alumosilicate forms causing a decrease in the FAME content.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Book of abstracts - Seventh Conference of the Young Chemists of Serbia",
title = "Biodiesel synthesis over green catalyst: The effect of thermal treatment of CaO/Zeolite precursor on catalytic activity",
pages = "101-101",
url = "https://hdl.handle.net/21.15107/rcub_cer_3748"
}

Paunović, A., Pavlović, S., Marinković, D.,& Mojović, L.. (2019). Biodiesel synthesis over green catalyst: The effect of thermal treatment of CaO/Zeolite precursor on catalytic activity. in Book of abstracts - Seventh Conference of the Young Chemists of Serbia
Belgrade : Serbian Chemical Society., 101-101.
https://hdl.handle.net/21.15107/rcub_cer_3748

Paunović A, Pavlović S, Marinković D, Mojović L. Biodiesel synthesis over green catalyst: The effect of thermal treatment of CaO/Zeolite precursor on catalytic activity. in Book of abstracts - Seventh Conference of the Young Chemists of Serbia. 2019;:101-101.
https://hdl.handle.net/21.15107/rcub_cer_3748 .

Paunović, Anđela, Pavlović, Stefan, Marinković, Dalibor, Mojović, Ljiljana, "Biodiesel synthesis over green catalyst: The effect of thermal treatment of CaO/Zeolite precursor on catalytic activity" in Book of abstracts - Seventh Conference of the Young Chemists of Serbia (2019):101-101,
https://hdl.handle.net/21.15107/rcub_cer_3748 .

TY  - CONF
AU  - Paunović, Anđela
AU  - Pavlović, Stefan
AU  - Marinković, Dalibor
AU  - Mojović, Ljiljana
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3778
AB  - Poster presented at Seventh Conference of the Young Chemists of Serbia, 2nd November 2019
T1  - Biodiesel synthesis over green catalyst: The effect of thermal treatment of CaO/Zeolite precursor on catalytic activity
UR  - https://hdl.handle.net/21.15107/rcub_cer_3778
ER  - 

@conference{
author = "Paunović, Anđela and Pavlović, Stefan and Marinković, Dalibor and Mojović, Ljiljana",
year = "2019",
abstract = "Poster presented at Seventh Conference of the Young Chemists of Serbia, 2nd November 2019",
title = "Biodiesel synthesis over green catalyst: The effect of thermal treatment of CaO/Zeolite precursor on catalytic activity",
url = "https://hdl.handle.net/21.15107/rcub_cer_3778"
}

Paunović, A., Pavlović, S., Marinković, D.,& Mojović, L.. (2019). Biodiesel synthesis over green catalyst: The effect of thermal treatment of CaO/Zeolite precursor on catalytic activity. .
https://hdl.handle.net/21.15107/rcub_cer_3778

Paunović A, Pavlović S, Marinković D, Mojović L. Biodiesel synthesis over green catalyst: The effect of thermal treatment of CaO/Zeolite precursor on catalytic activity. 2019;.
https://hdl.handle.net/21.15107/rcub_cer_3778 .

Paunović, Anđela, Pavlović, Stefan, Marinković, Dalibor, Mojović, Ljiljana, "Biodiesel synthesis over green catalyst: The effect of thermal treatment of CaO/Zeolite precursor on catalytic activity" (2019),
https://hdl.handle.net/21.15107/rcub_cer_3778 .