Effect of Antioxidant Species on Oxidation Stability of Fish Oil Biodiesel

Abstract

Five different synthetic antioxidants were evaluated to improve the oxidation stability of high polyunsaturated biodiesel fuel produced by transesterification of fish oil. Butylhydroxy toluene (BHT), propyl 3,4,5-trihydroxybenzoate and dodecyl 3,4,5-trihydroxybenzoate were not effective for improvement of the oxidation stability of the fish oil biodiesel, whereas t-butylhydroquinone (TBHQ) showed best performance to improve oxidation stability. In 5 mass% fish oil biodiesel/tetradecane mixture, the antioxidation effect of BHT continued longer than that of TBHQ because of the difference of solubility against the mixed solution.