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Kinetics of ultrasonic transesterification of waste cooking oil

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Abstract

This study reports the kinetics of ultrasonic transesterification of waste cooking oil into fatty acid methyl esters (FAMEs). Direct sonication of waste cooking oil under controlled external temperatures was performed. Transesterification kinetics under the influence of direct sonication was studied using eight different individual reaction orders with respect to waste cooking oil and methanol. The results show that reaction temperature has a very small effect on the transesterification reaction under direct sonication. The reaction rate constants for different temperatures (35, 45, 55, and 65°C) are determined as: 10.642 g2 mol−2 min−1; 7.053; 7.9727; 10.971 g mol−1 min−1 respectively and the activation energy of the ultrasonic transesterification of waste cooking oil was 19,645 J mol−1 K−1. © 2013 American Institute of Chemical Engineers Environ Prog, 33: 1051–1058, 2014

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