文献类型：期刊文献

中文题名：Cu-ZnO-Al2O3催化剂上甘油氢解制1,2-丙二醇的反应动力学（英文）

英文题名：Kinetics of Hydrogenolysis of Glycerol to Propylene Glycol over Cu-ZnO-Al2O3 Catalysts

作者：周志明;李浔;曾天鹰;洪闻彬;程振民;袁渭康

机构：[1] State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China; [2] School of Chemistry and Biological Engineering, Changsha University of Science and Technology, Changsha 410077, China

年份：2010

卷号：18

期号：3

起止页码：384

中文期刊名：中国化学工程学报(英文版)

外文期刊名：Chinese Journal of Chemical Engineering

收录：CSTPCD;;EI(收录号：20102713056627);Scopus;CSCD:【CSCD2011_2012】；

基金：Supported by the National High Technology Research and Development Program of China(2008AA05Z405);the National Natural Science Foundation of China(20706018);the Program for Changjiang Scholars and Innovative Research Team in University(IRT0721)

语种：中文

中文关键词：kinetics;hydrogenolysis;glycerol;propylene glycol;catalyst

外文关键词：kinetics;hydrogenolysis;glycerol;propylene glycol;catalyst

摘要：A series of Cu-ZnO-Al2O3 catalysts with various metal compositions of Cu/Zn/Al were prepared by the co-precipitation method,and screened for glycerol hydrogenolysis to propylene glycol.The catalyst with a Cu/Zn/Al molar ratio of 1:1:0.5 exhibited the best performance for glycerol hydrogenolysis,and thus selected for kinetic investigation.Under elimination of external and internal diffusion limitation,kinetic experiments were performed in an isothermal fixed-bed reactor at a hydrogen pressure range of 3.0-5.0 MPa and a temperature range of 493-513 K. Based on a dehydration-hydrogenation two-step hydrogenolysis mechanism,a two-site Langmuir-Hinshelwood kinetic model taking into account competitive adsorption of glycerol,acetol and propylene glycol was proposed and successfully fitted to the experimental data.The average relative errors between observed and predicted outlet concentrations of glycerol and propylene glycol were 6.3%and 7.6%,respectively.The kinetic and adsorption parameters were estimated by using the fourth-order Runge-Kutta method together with the Rosenbrock algorithm.The activation energies for dehydration and hydrogenation reactions were 86.56 and 57.80 kJ·mol-1,respectively.
A series of Cu-ZnO-Al2O3 catalysts with various metal compositions of Cu/Zn/Al were prepared by the co-precipitation method, and screened for glycerol hydrogenolysis to propylene glycol. The catalyst with a Cu/Zn/Al molar ratio of 1:1:0.5 exhibited the best performance for glycerol hydrogenolysis, and thus selected for kinetic investigation. Under elimination of external and internal diffusion limitation, kinetic experiments were performed in an isothermal fixed-bed reactor at a hydrogen pressure range of 3.0-5.0 MPa and a temperature range of 493-513 K.Based on a dehydration-hydrogenation two-step hydrogenolysis mechanism, a two-site Langmuir-Hinshelwood kinetic model taking into account competitive adsorption of glycerol, acetol and propylene glycol was proposed and successfully fitted to the experimental data. The average relative errors between observed and predicted outlet concentrations of glycerol and propylene glycol were 6.3% and 7.6%, respectively. The kinetic and adsorption parameters were estimated by using the fourth-order Runge-Kutta method together with the Rosenbrock algorithm. The ac