Kinetics of transesterification of soybean oil

被引:784
作者
Noureddini, H
Zhu, D
机构
[1] Department of Chemical Engineering, University of Nebraska, Lincoln
关键词
biodiesel; kinetics; methyl esters; mixing renewable fuels; soybean oil; transesterification; triglycerides;
D O I
10.1007/s11746-997-0254-2
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
Transesterification of soybean oil with methanol was investigated. Three stepwise and reversible reactions are believed to occur. The effect of variations in mixing intensity (Reynolds number = 3,100 to 12,400) and temperature (30 to 70 degrees C) on the rate of reaction were studied while the molar ratio of alcohol to triglycerol (6:1) and the concentration of catalyst (0.20 wt% based on soybean oil) were held constant. The variations in mixing intensity appear to effect the reaction parallel to the variations in temperature. A reaction mechanism consisting of an initial mass transfer-controlled region followed by a kinetically controlled region is proposed. The experimental data for the latter region appear to be a good fit into a second-order kinetic mechanism. The reaction rate constants and the activation energies were determined for all the forward and reverse reactions.
引用
收藏
页码:1457 / 1463
页数:7
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