中南大学学报（自然科学版）2011，Vol.42Issue(4)：903-908,6.
超声强化纳米固体碱催化大豆油酯交换制备生物柴油的动力学
Kinetics of nano solid base catalyzed transesterification of soybean oil for biodiesel production enhanced by ultrasonic irradiation
摘要
Abstract
Transesterification of soybean oil and methanol to synthesis biodiesel with solid super base KF/γ-Al2O3 as the catalyst was studied.Effects of experimental parameters including ultrasonic and mechanical stirring on the transesterification of soybean oil and methanol were investigated.Based on the transesterification mechanism, the macro kinetic equation of triglycerides transesterification was obtained.The results show that the reaction of transesterification is the second grade reaction of increase stage at the beginning and finally reaches the one and zero grade reaction with the transesterification during mechanical stirring.The reactive activation energy is 21.03 kJ/mol and the pre-exponential factor is 846.49 L/(mol·min) of the transesterification using the nano KF/γ-Al2O3 as catalyst.The kinetics of the transesterification during ultrasonic irradiation is basically the same as that of mechanical stirring, and the second grade reaction of increase stage at the beginning and finally reaches the one and zero grade reaction with the transesterification.The reactive activation energy and pre-exponential factor of the transesterification during ultrasonic irradiation is 12.99 kJ/mol and 76.33 L/(mol·min), respectively.Compared with that of mechanical stirring, the reactive activation energy is lower, and the reaction rate is higher during ultrasonic irradiation, which means the transesterification reaction is easily progressed and reaches the reaction equilibrium in a short time.关键词
超声/反应动力学/氟化钾/γ-氧化铝/催化剂/大豆油/酯交换/生物柴油Key words
ultrasonic/ kinetics/ KF/γ-Al2O3/ catalyst/ soybean oil/ transesterification/ biodiesel分类
化学化工引用本文复制引用
任庆功,阎杰,丘泰球..超声强化纳米固体碱催化大豆油酯交换制备生物柴油的动力学[J].中南大学学报（自然科学版）,2011,42(4):903-908,6.基金项目
广州市科技计划项目(2007J1-C0451) （2007J1-C0451）
常州大学博士启动基金资助项目(ZMF10020013) （ZMF10020013）
