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Synthesis and characterization of spherically-shaped CaO/gamma-Al2O3 catalyst and its application in biodiesel production

Authorized Users Only
2017
Authors
Marinković, Dalibor
Avramović, Jelena M.
Stanković, Miroslav
Stamenković, Olivera
Jovanović, Dušan M.
Veljković, Vlada B.
Article (Published version)
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Abstract
Loading CaO onto spherically-shaped gamma-Al2O3 support was applied for the preparation of a cost-effective and environmentally-friendly heterogeneous catalyst for biodiesel production. Physico-chemical, textural and morphological characterization was performed using optical emission spectroscopy (ICP OES), Hg-porosimetry, N-2 physisorption, scanning electron microscopy (FESEM), X-ray diffraction (XRPD), Fourier transform infrared spectroscopy (ATR FTIR) and Hammett indicators. The effects of catalyst preparation conditions (different precursor salts and calcination temperatures) on the catalyst activity, and the reaction conditions (methanol-to-oil molar ratio and catalyst loading) on the reaction rate and esters yield were studied. In addition, catalyst stability was investigated. The most active catalyst was derived from the nitrate precursor after calcination at 475 degrees C (inert atmosphere). Under mild reaction conditions (60 degrees C, 5 h, 900 rpm, methanol-to-oil molar ratio... of 12:1 and catalyst loading (CaO wt% to the oil) of 0.5%), the equilibrium ester content of 94.3% was obtained in the methanolysis of sunflower oil in a batch reactor. The catalyst remained sufficiently active in two consecutive cycles without any pretreatment. Mechanical erosion caused by stirring and massive deposition of organic molecules from the reaction mixture caused the decrease of catalytic activity while CaO leaching was negligible.

Keywords:
Biodiesel / CaO-based catalyst / CaO/gamma-Al2O3 / Catalyst stability / Heterogeneous catalyst / Transesterification
Source:
Energy Conversion and Management, 2017, 144, 399-413
Publisher:
  • Oxford : Pergamon-Elsevier Science Ltd
Funding / projects:
  • Nanostructured Functional and Composite Materials in Catalytic and Sorption Processes (RS-45001)

DOI: 10.1016/j.enconman.2017.04.079

ISSN: 0196-8904

WoS: 000403031600034

Scopus: 2-s2.0-85018976903
[ Google Scholar ]
53
41
URI
https://cer.ihtm.bg.ac.rs/handle/123456789/2255
Collections
  • Radovi istraživača / Researchers' publications
Institution/Community
IHTM
TY  - JOUR
AU  - Marinković, Dalibor
AU  - Avramović, Jelena M.
AU  - Stanković, Miroslav
AU  - Stamenković, Olivera
AU  - Jovanović, Dušan M.
AU  - Veljković, Vlada B.
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2255
AB  - Loading CaO onto spherically-shaped gamma-Al2O3 support was applied for the preparation of a cost-effective and environmentally-friendly heterogeneous catalyst for biodiesel production. Physico-chemical, textural and morphological characterization was performed using optical emission spectroscopy (ICP OES), Hg-porosimetry, N-2 physisorption, scanning electron microscopy (FESEM), X-ray diffraction (XRPD), Fourier transform infrared spectroscopy (ATR FTIR) and Hammett indicators. The effects of catalyst preparation conditions (different precursor salts and calcination temperatures) on the catalyst activity, and the reaction conditions (methanol-to-oil molar ratio and catalyst loading) on the reaction rate and esters yield were studied. In addition, catalyst stability was investigated. The most active catalyst was derived from the nitrate precursor after calcination at 475 degrees C (inert atmosphere). Under mild reaction conditions (60 degrees C, 5 h, 900 rpm, methanol-to-oil molar ratio of 12:1 and catalyst loading (CaO wt% to the oil) of 0.5%), the equilibrium ester content of 94.3% was obtained in the methanolysis of sunflower oil in a batch reactor. The catalyst remained sufficiently active in two consecutive cycles without any pretreatment. Mechanical erosion caused by stirring and massive deposition of organic molecules from the reaction mixture caused the decrease of catalytic activity while CaO leaching was negligible.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - Energy Conversion and Management
T1  - Synthesis and characterization of spherically-shaped CaO/gamma-Al2O3 catalyst and its application in biodiesel production
VL  - 144
SP  - 399
EP  - 413
DO  - 10.1016/j.enconman.2017.04.079
ER  - 
@article{
author = "Marinković, Dalibor and Avramović, Jelena M. and Stanković, Miroslav and Stamenković, Olivera and Jovanović, Dušan M. and Veljković, Vlada B.",
year = "2017",
abstract = "Loading CaO onto spherically-shaped gamma-Al2O3 support was applied for the preparation of a cost-effective and environmentally-friendly heterogeneous catalyst for biodiesel production. Physico-chemical, textural and morphological characterization was performed using optical emission spectroscopy (ICP OES), Hg-porosimetry, N-2 physisorption, scanning electron microscopy (FESEM), X-ray diffraction (XRPD), Fourier transform infrared spectroscopy (ATR FTIR) and Hammett indicators. The effects of catalyst preparation conditions (different precursor salts and calcination temperatures) on the catalyst activity, and the reaction conditions (methanol-to-oil molar ratio and catalyst loading) on the reaction rate and esters yield were studied. In addition, catalyst stability was investigated. The most active catalyst was derived from the nitrate precursor after calcination at 475 degrees C (inert atmosphere). Under mild reaction conditions (60 degrees C, 5 h, 900 rpm, methanol-to-oil molar ratio of 12:1 and catalyst loading (CaO wt% to the oil) of 0.5%), the equilibrium ester content of 94.3% was obtained in the methanolysis of sunflower oil in a batch reactor. The catalyst remained sufficiently active in two consecutive cycles without any pretreatment. Mechanical erosion caused by stirring and massive deposition of organic molecules from the reaction mixture caused the decrease of catalytic activity while CaO leaching was negligible.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "Energy Conversion and Management",
title = "Synthesis and characterization of spherically-shaped CaO/gamma-Al2O3 catalyst and its application in biodiesel production",
volume = "144",
pages = "399-413",
doi = "10.1016/j.enconman.2017.04.079"
}
Marinković, D., Avramović, J. M., Stanković, M., Stamenković, O., Jovanović, D. M.,& Veljković, V. B.. (2017). Synthesis and characterization of spherically-shaped CaO/gamma-Al2O3 catalyst and its application in biodiesel production. in Energy Conversion and Management
Oxford : Pergamon-Elsevier Science Ltd., 144, 399-413.
https://doi.org/10.1016/j.enconman.2017.04.079
Marinković D, Avramović JM, Stanković M, Stamenković O, Jovanović DM, Veljković VB. Synthesis and characterization of spherically-shaped CaO/gamma-Al2O3 catalyst and its application in biodiesel production. in Energy Conversion and Management. 2017;144:399-413.
doi:10.1016/j.enconman.2017.04.079 .
Marinković, Dalibor, Avramović, Jelena M., Stanković, Miroslav, Stamenković, Olivera, Jovanović, Dušan M., Veljković, Vlada B., "Synthesis and characterization of spherically-shaped CaO/gamma-Al2O3 catalyst and its application in biodiesel production" in Energy Conversion and Management, 144 (2017):399-413,
https://doi.org/10.1016/j.enconman.2017.04.079 . .

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