ARS | Publication request: Evaluation of Myricetin as an Antioxidant Additive in Soybean Oil Methyl Esters

Submitted to: Annual Meeting and Expo of the American Oil Chemists' Society
Publication Type: Abstract Only
Publication Acceptance Date: November 14, 2007
Publication Date: May 18, 2008
Citation: Moser, B.R. 2008. Evaluation of Myricetin as an Antioxidant Additive in Soybean Oil Methyl Esters [abstract]. Annual Meeting and Expo of the American Oil Chemists' Society. p. 91.

Technical Abstract: Biodiesel, an alternative fuel obtained by methanolysis of triacylglycerides, is considerably more susceptible to autoxidation than conventional petroleum diesel fuel. Treatment with antioxidant additives is a commonly used strategy to delay oxidative degradation of biodiesel. Flavonoids are previously unexplored with respect to oxidation stability of BD. The current study reports the efficacy of myricetin as an antioxidant additive in soybean oil methyl esters (SME), along with a comparison with alpha-tocopherol and TBHQ. The Rancimat method, EN 14112, was employed with measurements taken every 30 days over the course of a 90 day period at load levels of 0, 100, 500, and 1000 ppm in SME. It was discovered that the level of effectiveness of antioxidants was TBHQ > myricetin >> alpha-tocopherol. Also, alpha-tocopherol was found to have a pro-oxidant effect on SME. As expected, synergy among mixtures of antioxidants were more effective than single antioxidants at delaying oxidative degradation of SME.