Effect of Accelerated High Temperature on Oxidation and Polymerization of Biodiesel from Vegetable Oils

Jae-Kon Kim, Cheol-Hwan Jeon, Hyung Won Lee, Young-Kwon Park, Kyong-il Min, In-ha Hwang and Young-Min Kim
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Jae-Kon Kim: Research Institute of Petroleum Technology, Korea Petroleum Quality & Distribution Authority, Cheongju 28115, Korea
Cheol-Hwan Jeon: Research Institute of Petroleum Technology, Korea Petroleum Quality & Distribution Authority, Cheongju 28115, Korea
Hyung Won Lee: School of Environmental Engineering, University of Seoul, Seoul 02504, Korea
Young-Kwon Park: School of Environmental Engineering, University of Seoul, Seoul 02504, Korea
Kyong-il Min: Research Institute of Petroleum Technology, Korea Petroleum Quality & Distribution Authority, Cheongju 28115, Korea
In-ha Hwang: Research Institute of Petroleum Technology, Korea Petroleum Quality & Distribution Authority, Cheongju 28115, Korea
Young-Min Kim: Department of Environmental Sciences and Biotechnology, Hallym University, Chuncheon 24252, Korea

Energies, 2018, vol. 11, issue 12, 1-11

Abstract: Oxidation of biodiesel (BD) obtained from the decomposition of biomass can damage the fuel injection and engine parts during its use as a fuel. The excess heating of vegetable oils can also cause polymerization of the biodiesel. The extent of BD oxidation depends on its fatty acid composition. In this study, an accelerated oxidation test of BDs at 95 °C was investigated according to ASTM D 2274 by applying a long-term storage test for 16 weeks. The density, viscosity, and total acid number (TAN) of BDs increased because of the accelerated oxidation. Furthermore, the contents of unsaturated fatty acid methyl esters (FAMEs), C18:2 ME, and C18:3 ME in BDs decreased due to the accelerated oxidation. The 1 H-nuclear magnetic resonance spectrum of BDs that were obtained from the accelerated high temperature oxidation at 180 °C for 72 h differed from that of fresh BDs. The mass spectrum obtained from the analysis of the model FAME, linoleic acid (C18:2) methyl ester, which was oxidized at high temperature, indicated the formation of dimers and epoxy dimers of linoleic acid (C18:2) methyl ester by a Diels-Alder reaction.

Keywords: biodiesel; fatty acid methyl ester; free fatty acids; oxidation stability; antioxidant (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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