Journal
ULTRASONICS SONOCHEMISTRY
Volume 21, Issue 2, Pages 467-471Publisher
ELSEVIER
DOI: 10.1016/j.ultsonch.2013.09.015
Keywords
Kinetics; Transesterification; Ultrasound irradiation; Triglycerides; Fatty acid methyl esters
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Funding
- Science and Technology Research Partnership for Sustainable Development (SATREPS, Project: Multi-beneficial Measure for the Mitigation of Climate Change by the Integrated Utilization of Biomass Energy in Vietnam and Indochina countries)
- JST-JICA, Japan
- New Energy and Industrial Technology Development Organization
- Japan Science and Technology Agency
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Ultrasound assisted transesterification of triglycerides (TG) with methanol in the presence of KOH catalyst was investigated, where the changes in the reactants and products (diglycerides (DG), monoglycerides (MG), fatty acid methyl esters (FAME) and glycerin (GL)) concentrations were discussed to understand the reaction mechanism and kinetics under ultrasound irradiation. The optimum reaction condition for the FAME production was the concentration of KOH 1.0 wt.%, molar ratio of TG to methanol of 1:6, and irradiation time of 25 min. The rate constants during the TG transesterification with methanol into GL and FAME were estimated by a curve fitting method with simulated curves to the obtained experimental results. The rate constants of k(1(TG center dot CH3OH-DG FAMEJ center dot)k(-1(DG FAME-TG center dot CH3OHJ center dot)k(2(MG CH3OH-MG center dot FAME)center dot) k(-2(MG center dot FAME-DG CH3OHJ), k(3(MG CH3OH-GL FAMEJ) and k(-3(GL FAME-MG CH3OHJ) were estimated to be 0.21, 0.008, 0.23, 0.005, 0.14 and 0.001 L mol(-1) min(-1), respectively. The rate determining step for the TG transesterification with methanol into GL and FAME was the reaction of MG with methanol into GL and FAME. (C) 2013 Elsevier B.V. All rights reserved.
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