TY  - CONF
AU  - Kostić, Milan
AU  - Đorđević, Biljana
AU  - Pavlović, Stefan
AU  - Miladinović, Marija R.
AU  - Stamenković, Olivera
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7352
AB  - The investigation of reaction kinetics is crucial for practical implications in process equipment design and scaling up. In this study, a kinetic analysis of the methanolysis of a blend of radish and castor oil catalyzed by calcium oxide was carried out. The objectives were to propose a comprehensive model for describing the kinetics of this methanolysis reaction and determine its activation energy. The methanolysis was conducted in a batch reactor under atmospheric pressure with the following reaction conditions: a radish-to-castor oil blend mass ratio of 1:1, a methanol-to-oil molar ratio of 12:1, a catalyst amount of 5% of the oil blend weight, and reaction temperatures of 
30 C, 45 C, and 60 C. The model involving the changing reaction mechanism and the triacylglycerol (TAG) mass transfer limitation was first simplified to a pseudo-first order model regarding TAGs and fatty acid methyl esters, which was then used to calculate the apparent reaction rate constant. A good agreement between the calculated and experimental values of the TAG conversion degree was proved by a low mean relative percentage deviation of ±6.1% (based on 66 data), thus validating the applied simple kinetic model. A positive effect of the reaction temperature on the apparent reaction rate constant was observed. Using the Arrhenius equation, the activation energy of methanolysis was determined to be 46.12 kJ/mol. The obtained value of activation energy is much lower than values of activation energy determined for the calcium oxide-catalyzed methanolysis of single oil feedstocks, such as soybean, canola, Jatropha, and waste frying oils. The lower activation energy suggests the potential for enhanced efficiency and feasibility of utilizing this blend as a feedstock for biodiesel production compared to the individual oily feedstocks previously studied.
PB  - Leskovac : Faculty of Technology
C3  - Book of abstracts - 15th international symposium „Novel technologies and sustainable development“,  October, 20-21, 2023, Leskovac, Serbia
T1  - Kinetic modeling of the biodiesel production from sunflower oil over corn cob ash
SP  - 129
EP  - 130
UR  - https://hdl.handle.net/21.15107/rcub_cer_7352
ER  - 

@conference{
author = "Kostić, Milan and Đorđević, Biljana and Pavlović, Stefan and Miladinović, Marija R. and Stamenković, Olivera",
year = "2023",
abstract = "The investigation of reaction kinetics is crucial for practical implications in process equipment design and scaling up. In this study, a kinetic analysis of the methanolysis of a blend of radish and castor oil catalyzed by calcium oxide was carried out. The objectives were to propose a comprehensive model for describing the kinetics of this methanolysis reaction and determine its activation energy. The methanolysis was conducted in a batch reactor under atmospheric pressure with the following reaction conditions: a radish-to-castor oil blend mass ratio of 1:1, a methanol-to-oil molar ratio of 12:1, a catalyst amount of 5% of the oil blend weight, and reaction temperatures of 
30 C, 45 C, and 60 C. The model involving the changing reaction mechanism and the triacylglycerol (TAG) mass transfer limitation was first simplified to a pseudo-first order model regarding TAGs and fatty acid methyl esters, which was then used to calculate the apparent reaction rate constant. A good agreement between the calculated and experimental values of the TAG conversion degree was proved by a low mean relative percentage deviation of ±6.1% (based on 66 data), thus validating the applied simple kinetic model. A positive effect of the reaction temperature on the apparent reaction rate constant was observed. Using the Arrhenius equation, the activation energy of methanolysis was determined to be 46.12 kJ/mol. The obtained value of activation energy is much lower than values of activation energy determined for the calcium oxide-catalyzed methanolysis of single oil feedstocks, such as soybean, canola, Jatropha, and waste frying oils. The lower activation energy suggests the potential for enhanced efficiency and feasibility of utilizing this blend as a feedstock for biodiesel production compared to the individual oily feedstocks previously studied.",
publisher = "Leskovac : Faculty of Technology",
journal = "Book of abstracts - 15th international symposium „Novel technologies and sustainable development“,  October, 20-21, 2023, Leskovac, Serbia",
title = "Kinetic modeling of the biodiesel production from sunflower oil over corn cob ash",
pages = "129-130",
url = "https://hdl.handle.net/21.15107/rcub_cer_7352"
}

Kostić, M., Đorđević, B., Pavlović, S., Miladinović, M. R.,& Stamenković, O.. (2023). Kinetic modeling of the biodiesel production from sunflower oil over corn cob ash. in Book of abstracts - 15th international symposium „Novel technologies and sustainable development“,  October, 20-21, 2023, Leskovac, Serbia
Leskovac : Faculty of Technology., 129-130.
https://hdl.handle.net/21.15107/rcub_cer_7352

Kostić M, Đorđević B, Pavlović S, Miladinović MR, Stamenković O. Kinetic modeling of the biodiesel production from sunflower oil over corn cob ash. in Book of abstracts - 15th international symposium „Novel technologies and sustainable development“,  October, 20-21, 2023, Leskovac, Serbia. 2023;:129-130.
https://hdl.handle.net/21.15107/rcub_cer_7352 .

Kostić, Milan, Đorđević, Biljana, Pavlović, Stefan, Miladinović, Marija R., Stamenković, Olivera, "Kinetic modeling of the biodiesel production from sunflower oil over corn cob ash" in Book of abstracts - 15th international symposium „Novel technologies and sustainable development“,  October, 20-21, 2023, Leskovac, Serbia (2023):129-130,
https://hdl.handle.net/21.15107/rcub_cer_7352 .

TY  - CONF
AU  - Đorđević, Biljana
AU  - Pavlović, Stefan
AU  - Kostić, Milan
AU  - Stamenković, Olivera
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7353
AB  - Waste plum kernels from the fruit processing industry might be a valuable oil source  for biodiesel production which use can reduce the biodiesel production cost. The  application of green cosolvents, like deep eutectic solvents (DESs), in the alcoholysis  reaction can improve the oil conversion rate. This study reports on the optimization the plum kernel oil methanolysis over 35CaO/ZP (35% CaO supported on a fly ash-based  zeolite) in the presence of triethanolamine:menthol (TEOA:M, 2:1 mol/mol) DES as  cosolvent. The reactions were carried out in a 250 mL batch magnetic stirred reactor  (900 rpm) with a reflux condenser under atmosferic pressure and at 60 °C. The effect  of the catalyst amount (2-10% based on the oil mass), TEOA:M DES amount (1-9%  based on the oil mass) and methanol:oil molar ratio (6:1-12:1 mol/mol) on the fatty acid  methyl esters (FAMEs) content was analyzed according to a Box-Behnken design. The  obtained experimental data of the FAME content were modeled by a second-order  polynomial equation and the response surface methodology was used for determining  the optimal reaction conditions for achieving the highest FAME content. According to  the analysis of variance (ANOVA), the catalyst amount had the most significant  influence on the FAME content, followed by the TEOA:M DES amount and the  methanol:oil molar ratio. By analyzing the second-order polynomial equation, it can be  concluded that the catalyst amount and TEOA:M DES amount have a positive effect on  the FAME content. The maximum FAME content (99.67%) was achieved under the  following optimal reaction conditions: catalyst amount of 8% (based on the oil mass),  TEOA:M DES amount of 4.8% (based on the oil mass), and methanol:oil molar ratio of  6.1:1.
PB  - Leskovac : Faculty of Technology
C3  - Book of abstracts - 15th international symposium „Novel technologies and sustainable development“,  October, 20-21, 2023, Leskovac, Serbia
T1  - Optimization of the heterogeneously catalysed methanolysis of plum kernel oil in the presence of menthol-based deep eutectic solvent
SP  - 128
EP  - 129
UR  - https://hdl.handle.net/21.15107/rcub_cer_7353
ER  - 

@conference{
author = "Đorđević, Biljana and Pavlović, Stefan and Kostić, Milan and Stamenković, Olivera",
year = "2023",
abstract = "Waste plum kernels from the fruit processing industry might be a valuable oil source  for biodiesel production which use can reduce the biodiesel production cost. The  application of green cosolvents, like deep eutectic solvents (DESs), in the alcoholysis  reaction can improve the oil conversion rate. This study reports on the optimization the plum kernel oil methanolysis over 35CaO/ZP (35% CaO supported on a fly ash-based  zeolite) in the presence of triethanolamine:menthol (TEOA:M, 2:1 mol/mol) DES as  cosolvent. The reactions were carried out in a 250 mL batch magnetic stirred reactor  (900 rpm) with a reflux condenser under atmosferic pressure and at 60 °C. The effect  of the catalyst amount (2-10% based on the oil mass), TEOA:M DES amount (1-9%  based on the oil mass) and methanol:oil molar ratio (6:1-12:1 mol/mol) on the fatty acid  methyl esters (FAMEs) content was analyzed according to a Box-Behnken design. The  obtained experimental data of the FAME content were modeled by a second-order  polynomial equation and the response surface methodology was used for determining  the optimal reaction conditions for achieving the highest FAME content. According to  the analysis of variance (ANOVA), the catalyst amount had the most significant  influence on the FAME content, followed by the TEOA:M DES amount and the  methanol:oil molar ratio. By analyzing the second-order polynomial equation, it can be  concluded that the catalyst amount and TEOA:M DES amount have a positive effect on  the FAME content. The maximum FAME content (99.67%) was achieved under the  following optimal reaction conditions: catalyst amount of 8% (based on the oil mass),  TEOA:M DES amount of 4.8% (based on the oil mass), and methanol:oil molar ratio of  6.1:1.",
publisher = "Leskovac : Faculty of Technology",
journal = "Book of abstracts - 15th international symposium „Novel technologies and sustainable development“,  October, 20-21, 2023, Leskovac, Serbia",
title = "Optimization of the heterogeneously catalysed methanolysis of plum kernel oil in the presence of menthol-based deep eutectic solvent",
pages = "128-129",
url = "https://hdl.handle.net/21.15107/rcub_cer_7353"
}

Đorđević, B., Pavlović, S., Kostić, M.,& Stamenković, O.. (2023). Optimization of the heterogeneously catalysed methanolysis of plum kernel oil in the presence of menthol-based deep eutectic solvent. in Book of abstracts - 15th international symposium „Novel technologies and sustainable development“,  October, 20-21, 2023, Leskovac, Serbia
Leskovac : Faculty of Technology., 128-129.
https://hdl.handle.net/21.15107/rcub_cer_7353

Đorđević B, Pavlović S, Kostić M, Stamenković O. Optimization of the heterogeneously catalysed methanolysis of plum kernel oil in the presence of menthol-based deep eutectic solvent. in Book of abstracts - 15th international symposium „Novel technologies and sustainable development“,  October, 20-21, 2023, Leskovac, Serbia. 2023;:128-129.
https://hdl.handle.net/21.15107/rcub_cer_7353 .

Đorđević, Biljana, Pavlović, Stefan, Kostić, Milan, Stamenković, Olivera, "Optimization of the heterogeneously catalysed methanolysis of plum kernel oil in the presence of menthol-based deep eutectic solvent" in Book of abstracts - 15th international symposium „Novel technologies and sustainable development“,  October, 20-21, 2023, Leskovac, Serbia (2023):128-129,
https://hdl.handle.net/21.15107/rcub_cer_7353 .