TY  - JOUR
AU  - Miladinovic, Marija R.
AU  - Krstic, Jugoslav B.
AU  - Zdujic, Miodrag, V
AU  - Veselinovic, Ljiljana M.
AU  - Veljović, Đorđe
AU  - Bankovic-Ilic, Ivana B.
AU  - Stamenkovic, Olivera S.
AU  - Veljkovic, Vlada B.
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4976
AB  - Hazelnut shell ash was investigated as a new base catalyst for the transesterification of used cooking sunflower oil to biodiesel. To understand its catalytic properties, the prepared ash was characterized by EDX, XRD, TGA/DTA, Hg porosimetry, N-2 physisorption, FE-SEM, and basic strength measurements. The effects of the catalyst loading in the range of 1-5% of the oil weight and the methanol-to-oil molar ratio of 6:1-18:1 on the kinetics of the fatty acid methyl esters synthesis were established. Moreover, the leaching and reusability of the catalyst were assessed. The obtained results revealed that hazelnut shell ash was mostly composed of K, Ca, and Mg. The highest ester content (98%) was achieved at the catalyst loading of 5%, the methanol-to-oil molar ratio of 12:1, and the reaction time of 10 min. The contribution of homogeneous catalysis because of the catalyst leaching was confirmed but did not determine the overall reaction rate. The catalyst can be reused after the recalcination at 800 degrees C for 2 h achieving the high methyl esters content (>96%) in 30 min after three subsequent runs. The overall reaction followed the pseudo-first-order kinetics with respect to triacylglycerols. A linear relationship between the apparent reaction rate constant and the catalyst loading and the methanol-to-oil molar ratio was determined. The determined value of the reaction rate constant was 0.0576 dm(6)/(min.mol(2)).
T2  - Renewable Energy
T1  - Transesterification of used cooking sunflower oil catalyzed by hazelnut shell ash
EP  - 113
SP  - 103
VL  - 183
DO  - 10.1016/j.renene.2021.10.071
ER  - 

@article{
author = "Miladinovic, Marija R. and Krstic, Jugoslav B. and Zdujic, Miodrag, V and Veselinovic, Ljiljana M. and Veljović, Đorđe and Bankovic-Ilic, Ivana B. and Stamenkovic, Olivera S. and Veljkovic, Vlada B.",
year = "2022",
abstract = "Hazelnut shell ash was investigated as a new base catalyst for the transesterification of used cooking sunflower oil to biodiesel. To understand its catalytic properties, the prepared ash was characterized by EDX, XRD, TGA/DTA, Hg porosimetry, N-2 physisorption, FE-SEM, and basic strength measurements. The effects of the catalyst loading in the range of 1-5% of the oil weight and the methanol-to-oil molar ratio of 6:1-18:1 on the kinetics of the fatty acid methyl esters synthesis were established. Moreover, the leaching and reusability of the catalyst were assessed. The obtained results revealed that hazelnut shell ash was mostly composed of K, Ca, and Mg. The highest ester content (98%) was achieved at the catalyst loading of 5%, the methanol-to-oil molar ratio of 12:1, and the reaction time of 10 min. The contribution of homogeneous catalysis because of the catalyst leaching was confirmed but did not determine the overall reaction rate. The catalyst can be reused after the recalcination at 800 degrees C for 2 h achieving the high methyl esters content (>96%) in 30 min after three subsequent runs. The overall reaction followed the pseudo-first-order kinetics with respect to triacylglycerols. A linear relationship between the apparent reaction rate constant and the catalyst loading and the methanol-to-oil molar ratio was determined. The determined value of the reaction rate constant was 0.0576 dm(6)/(min.mol(2)).",
journal = "Renewable Energy",
title = "Transesterification of used cooking sunflower oil catalyzed by hazelnut shell ash",
pages = "113-103",
volume = "183",
doi = "10.1016/j.renene.2021.10.071"
}

Miladinovic, M. R., Krstic, J. B., Zdujic, M. V., Veselinovic, L. M., Veljović, Đ., Bankovic-Ilic, I. B., Stamenkovic, O. S.,& Veljkovic, V. B.. (2022). Transesterification of used cooking sunflower oil catalyzed by hazelnut shell ash. in Renewable Energy, 183, 103-113.
https://doi.org/10.1016/j.renene.2021.10.071

Miladinovic MR, Krstic JB, Zdujic MV, Veselinovic LM, Veljović Đ, Bankovic-Ilic IB, Stamenkovic OS, Veljkovic VB. Transesterification of used cooking sunflower oil catalyzed by hazelnut shell ash. in Renewable Energy. 2022;183:103-113.
doi:10.1016/j.renene.2021.10.071 .

Miladinovic, Marija R., Krstic, Jugoslav B., Zdujic, Miodrag, V, Veselinovic, Ljiljana M., Veljović, Đorđe, Bankovic-Ilic, Ivana B., Stamenkovic, Olivera S., Veljkovic, Vlada B., "Transesterification of used cooking sunflower oil catalyzed by hazelnut shell ash" in Renewable Energy, 183 (2022):103-113,
https://doi.org/10.1016/j.renene.2021.10.071 . .