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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/5996

Title: The effect of synthetic antioxidants on the oxidative stability of biodiesel
Authors: Focke, WW
Van der Westhuizen, I
Lofté Grobler, AB
Nshoane, KT
Reddy, JK
Luyt, AS
Keywords: Anti-oxidants
Oxidation induction time
Oxidative stability
Rancimat method
Issue Date: Apr-2012
Publisher: Elsevier
Citation: Focke, WW, Van der Westhuizen, I, Lofté Grobler, AB, Nshoane, KT, Reddy, JK and Luyt, AS. 2012. The effect of synthetic antioxidants on the oxidative stability of biodiesel. Fuel, vol. 94, pp 227-233
Series/Report no.: Workflow;5721
Abstract: Biodiesels were prepared using base catalyzed methanolysis of sunflower, soybean and canola oils. Rancimat oxidative stability measurements showed that the induction period (IP) for neat canola biodiesel conformed to EN 14214, the European specification for biodiesel (IP > 6 h). Stability was enhanced when 0.5 wt. % of the synthetic anti-oxidants di-tertbutylhydroquinone (DTBHQ) or poly(1,2-dihydro-2,2,4-trimethylquinoline) (Orox PK) was added. Soybean-based biodiesel spiked with 0.5 wt. % DTBHQ also reached this specification. Orox PK improved the stability of sunflower biodiesel but the 3 h induction period specified by ASTM D-6751 could not be reached. Curiously, canola biodiesel was destabilized on adding the antioxidant Naugard P (tris(nonylphenyl) phosphate).
Description: Copyright: 2011 Elsevier. This is the pre-print version of the work. The definitive version is published in Fuel, vol. 94, pp 227-233
URI: http://www.sciencedirect.com/science/article/pii/S0016236111007757
ISSN: 0016-2361
Appears in Collections:General science, engineering & technology
Agroprocessing and chemical technology

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