Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 106: Issue 3
Characterization and kinetic study of sunflower oil and biodiesel
Authors:
Anne G. D. Santos Institute of Chemistry, Federal University of Rio Grande do Norte, Natal, RN, 59078-970, Brazil

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Vinícius P. S. Caldeira Institute of Chemistry, Federal University of Rio Grande do Norte, Natal, RN, 59078-970, Brazil

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Mirna F. Farias Institute of Chemistry, Federal University of Rio Grande do Norte, Natal, RN, 59078-970, Brazil

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Antonio S. Araújo Institute of Chemistry, Federal University of Rio Grande do Norte, Natal, RN, 59078-970, Brazil

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Luiz D. Souza Department of Chemistry, State University of Rio Grande do Norte, Mossoró, RN, 59610-210, Brazil

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Allan K. Barros National Agency of Petroleum, Natural Gas and Biofuels, Av. Rio Branco 65, Rio de Janeiro, RJ, 20090-004, Brazil

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Pages:
747–751
Online Publication Date:
01 Sep 2011
Publication Date:
01 Dec 2011
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-011-1838-5
Keywords:
Biodiesel; Oil; Sunflower; Kinetic and thermal analysis
Restricted access

Abstract

In this study, the physico-chemistry characterization and kinetic study of the thermal decomposition of sunflower oil and its biodiesel were carried out. Sunflower biodiesel was synthesized by the methanol route and basic homogeneous catalysis. The physicochemical characterization of the sunflower oil and biodiesel were performed according to standards set out in the ANP resolution, and both are in accordance to the specifications. The chromatographic analysis was obtained by GC-FID. The yield of conversion of 97.4 wt% of sunflower oil in methyl esters confirms the efficiency of the conversion of the fatty acids into esters. The thermal analysis was performed on a thermobalance, using heating rates of 5, 10, and 20 °C min−1. In these three rates, we observed a single well-defined step of mass loss that describes the volatilization and decomposition of the sunflower oil and the biodiesel. The kinetic study was performed using equations of approximation and integration methods such as Coats–Redfern, Van Krevelen, and Horowitz–Metzger. The kinetic parameters reaction order (n) and apparent activation energy (Ea), obtained by applying these method were correlated.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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