Anti-Oxidation Stability and its Mechanism of Soybean Biodiesel

Jiang Wu; Bo Shui Chen; Jian Hua Fang; Jiu Wang

doi:10.4028/www.scientific.net/AMM.339.695

Paper Titles

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The Mechanical Property of Recycled Fiber Reinforced Polymer Composites by Superheated Steam
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Temperature Changes of Fabrics for the Drop Test with Different Volumes of Water
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Anti-Oxidation Stability and its Mechanism of Soybean Biodiesel
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Effect of the Heat Input in the Transformation of Retained Austenite in Advanced Steels of Transformation Induced Plasticity (TRIP) Welded with Gas Metal Arc Welding
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Soliton-Like Light Propagation through Coupled Resonators Constructed with Periodic Metal-Dielectric Layers
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Distribution and Contamination of Chromium in the Surface Sediments of Salt River Estuary, Taiwan
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Material Source Analysis of the Potash Deposit in Mengyejing, Yunnan
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Anti-Oxidation Stability and its Mechanism of Soybean Biodiesel

Abstract:

The anti-oxidation stability of soybean biodiesel (SME) was evaluated on an oxidation simulator set up by the author. The results showed that oxidative stability of SME was worse than that of petrodiesel by exhibiting higher acid values and peroxide values, as well as greater viscosity increases after oxidation. Furthermore, a conjecture was taken about the configurational changes and the oxidation mechanisms of unsaturated fatty acid methyl ester molecules in the oxidation process, according to the principles of free radical reactions and the results of both infrared and ultraviolet spectroscopic analysis. An idea was put forward that, during oxidation, cis-trans isomerization might occur in unsaturated fatty acid methyl ester molecules and conjugated double-bond might produce due to transfer of double-bond.