SET Proceedings 2978-4387 Caravel Press 10.65582/set.2008.065 2008.065 The Viscosity Method for Monitoring Transesterification of Vegetable Oils for Biodiesel HyunYoung Jin yjhyun@cheju.ac.kr Department of Chemical and Biological Engineering, Institute of Advanced Technology, Cheju National University, Jeju-Shi, 690-756, Korea 24082008 7 1 978-1-995850-08-5 510 522 24 August 2008 © 2008 Copyright WSSET 2008

The transesrerification of vegetable oils such as canola oil, soybean oil and corn oil with the changes of catalyst and molar ratio of methanol to oil was performed at 60℃ and 1000s⁻¹ of shear rate on the rotary viscometer. The viscosity of fatty acid methyl esters was calculated by experimental shear stress. The viscosity of fatty acid methyl ester at different temperature was estimated by Orrick and Erbar’s model. The overall yield was predicted through monitoring the viscosity of fatty acid methyl esters. The overall yield at the 1:6 molar ratio and 0.6wt% NaOH for vegetable oils showed 85 - 95% for 5.1 – 7.1 x10⁻³ Pa s of viscosity in 25 minutes and was predicted well by the relation of viscosity(ηmix) monitored.

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