Kinetic and thermodynamic studies of the esterification of acidified oil catalyzed by sulfonated cation exchange resin  

作　　者：Lingling Ma Ying Han Kaian Sun Jie Lu Jincheng Ding 

机构地区：[1]College of Chemical Engineering,Shandong University of Technology [2]Department of Resources and Environmental Engineering,Shandong University of Technology

出　　处：《Journal of Energy Chemistry》2015年第4期456-462,共7页能源化学（英文版）

基　　金：support from the Natural Science Foundation of Shandong Province (Grant no.ZR2013BL010);the Research Excellence Award of Shandong University of Technology and the Zibo Technology Research and Development Program of China (Grant no.2013GG04110)

摘　　要：This study describes the kinetics and thermodynamics of the esterification of acidified oil with methanol catalyzed by sulfonated cation exchange resins（SCER）. The effects of the mass ratio of methanol to acidified oil,reaction temperature,and catalyst loading were studied to optimize the conditions for maximum conversion of free fatty acids（FFAs）. The results showed that the optimal conversion rate of FFAs was 91.87% at the mass ratio of methanol to acidified oil of 2.5：1.0,reaction temperature of 65.0 °C,catalyst loading of 5.0 g and reaction time of 8.0 h. The external and internal mass transfer resistances were negligible based on the experimental results and a pseudo-homogeneous kinetic model was proposed for the esterification. The activation energy and thermodynamic parameters including G,S and H were determined. The conversion rates of FFAs obtained from the established model were in good agreement with the experimental data.This study describes the kinetics and thermodynamics of the esterification of acidified oil with methanol catalyzed by sulfonated cation exchange resins（SCER）. The effects of the mass ratio of methanol to acidified oil,reaction temperature,and catalyst loading were studied to optimize the conditions for maximum conversion of free fatty acids（FFAs）. The results showed that the optimal conversion rate of FFAs was 91.87% at the mass ratio of methanol to acidified oil of 2.5：1.0,reaction temperature of 65.0 °C,catalyst loading of 5.0 g and reaction time of 8.0 h. The external and internal mass transfer resistances were negligible based on the experimental results and a pseudo-homogeneous kinetic model was proposed for the esterification. The activation energy and thermodynamic parameters including G,S and H were determined. The conversion rates of FFAs obtained from the established model were in good agreement with the experimental data.

关 键 词：Acidified oil Biodiesel Esterification Pseudo-homogeneous model Sulfonated cation exchange resin 

分 类 号：TE667[石油与天然气工程—油气加工工程]