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

能源化学(英文) ›› 2015, Vol. 21 ›› Issue (4): 456-462.

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

Lingling Ma^a, Ying Han^a, Kaian Sun^a, Jie Lu^b, Jincheng Ding^a

a College of Chemical Engineering, Shandong University of Technology, Zibo 255049, Shandong, China;
b Department of Resources and Environmental Engineering, Shandong University of Technology, Zibo 255049, Shandong, China

收稿日期:2015-02-28 修回日期:2015-04-08 发布日期:2015-08-21
通讯作者: Jie Lu, Jincheng Ding
基金资助:
The authors acknowledge the 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). The authors also wish to express their thanks to Zibo Jinxuan Resources and Environmental Technology Development Co., Ltd. for their sincere help during this work.

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

Lingling Ma^a, Ying Han^a, Kaian Sun^a, Jie Lu^b, Jincheng Ding^a

a College of Chemical Engineering, Shandong University of Technology, Zibo 255049, Shandong, China;
b Department of Resources and Environmental Engineering, Shandong University of Technology, Zibo 255049, Shandong, China

Received:2015-02-28 Revised:2015-04-08 Published:2015-08-21
Contact: Jie Lu, Jincheng Ding
Supported by:
The authors acknowledge the 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). The authors also wish to express their thanks to Zibo Jinxuan Resources and Environmental Technology Development Co., Ltd. for their sincere help during this work.

摘要/Abstract

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 ℃, 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 ΔG, ΔS and ΔH 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

Abstract: 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 ℃, 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 ΔG, ΔS and ΔH were determined. The conversion rates of FFAs obtained from the established model were in good agreement with the experimental data.

Key words: Acidified oil, Biodiesel, Esterification, Pseudo-homogeneous model, Sulfonated cation exchange resin

Lingling Ma, Ying Han, Kaian Sun, Jie Lu, Jincheng Ding. Kinetic and thermodynamic studies of the esterification of acidified oil catalyzed by sulfonated cation exchange resin[J]. 能源化学(英文), 2015, 21(4): 456-462.

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

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

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