Synthesis and characterization of spherically-shaped CaO/gamma-Al2O3 catalyst and its application in biodiesel production
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2017
Authors
Marinković, DaliborAvramović, Jelena M.
Stanković, Miroslav
Stamenković, Olivera
Jovanović, Dušan M.
Veljković, Vlada B.
Article (Published version)
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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 / TransesterificationSource:
Energy Conversion and Management, 2017, 144, 399-413Publisher:
- Oxford : Pergamon-Elsevier Science Ltd
Funding / projects:
- Nanostructured Functional and Composite Materials in Catalytic and Sorption Processes (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45001)
DOI: 10.1016/j.enconman.2017.04.079
ISSN: 0196-8904
WoS: 000403031600034
Scopus: 2-s2.0-85018976903
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IHTMTY - 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 . .