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Authors: GOG ADRIANA, MIRCEA CHINTOANU, MARIUS ROMAN, EMIL LUCA, CSABA PAIZS, FLORIN-DAN IRIMIE.
In this paper, we have evaluated the efficacy of an enzymatic method for the transesterification process of sunflower oil with methanol in the presence of tert-butanol. tert-Butanol was used as the reaction medium to eliminate both negative effect caused by excessive methanol and glycerol resulted as by product. Using the following reaction conditions: 1% Novozym 435 based on oil weight, methanol / oil molar ratio 6:1, tert-butanol/ oil volume ratio 6:1, the FAME reached its maximum level after 3h, with a value of 78.6% (m/m).
Keywords: biodiesel, tert-Butanol, Novozym 435, enzymatic transesterification
