Optimized Antioxidants for Biodiesel

Richard A. Larson, Karen A. Marley

Research output: Book/Report/Conference proceedingTechnical report


Methods to improve the oxidative stability of B100 biodiesel were studied. A combination of a peroxide destroyer - triphenylphosphine - and a chain-breaking antioxidant - propyl gallate - was found to largely prevent oxidative damage in soy- and waste oil-derived biodiesels. Peroxides were shown to react rapidly with propyl gallate and render it ineffective. Triphenylphosphine alone provided some protection from oxidation, but not to the extent of the combination. Propyl gallate was found to be superior to other potential surfaceactive or chain-breaking antioxidants tested, such as ascorbyl palmitate, butylated hydroxytoluene (BHT), Trolox, and other gallate esters.
Original languageEnglish (US)
Place of PublicationChampaign, IL
PublisherIllinois Sustainable Technology Center
StatePublished - Sep 2011

Publication series

Name2010 Sponsored Research Symposium
NameTR Series (Sustainable Technology Center)


  • Biodiesel fuels -- Research
  • Oxidation chemistry


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