Synergistic effects of antioxidants on the oxidative stability of soybean oil- and poultry fat-based biodiesel

被引：1
|
作者：
De Guzman, Rhet [1 ]
Tang, Haiying [1 ]
Salley, Steven [1 ]
Ng, K. Y. Simon [1 ]
机构：
[1] Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, MI, United States
来源：
JAOCS, Journal of the American Oil Chemists' Society | 2009年 / 86卷 / 05期
关键词：
Biodiesel is an alternative fuel composed of saturated and unsaturated methyl ester fatty acids that is very prone to oxidation attack. Exposure to air; heat; light; and metallic contaminants can lead to autoxidation; and the degradation of fuel properties such as kinematic viscosity and total acid number. This study examines the effectiveness of blends of primary antioxidants from combinations of butylated hydroxyanisole (BHA); propyl gallate (PG); pyrogallol (PY) and tert-butyl hydroquinone (TBHQ) to increase oxidative stability. Results indicate that binary antioxidant formulations: TBHQ:BHA; TBHQ:PG and TBHQ:PY were most effective at 2:1; 1:1; 2:1 weight ratio; respectively in both distilled soybean oil- (DSBO) and distilled poultry fat- (DPF) based biodiesel. Antioxidant activity increased as the loadings were increased. The synergisms of the antioxidant pairs were different with different biodiesel types; suggesting a dependence on the fatty acid methyl ester (FAME) composition. The best synergistic effect was observed with the TBHQ:BHA blends while the best stabilization factors (SF) were achieved by using the TBHQ:PY blends. Quantification of antioxidant content in stored biodiesel with TBHQ:PY blend demonstrates that the main factor of synergy is the regeneration of PY by TBHQ. © 2009 AOCS;
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Journal article (JA)
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页码：459 / 467
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