在Pd/γ-Al_2O_3催化剂上液相苯加氢的反应动力学  

Reaction Kinetics of Liquid-phase Benzene Hydrogenation on Pd/γ-Al_2O_3

作　　者：周志明[1] 程振民[1] 李卓[1] 袁渭康[1] 

机构地区：[1]华东理工大学联合化学反应工程研究所,上海200237

出　　处：《华东理工大学学报（自然科学版）》2004年第1期1-5,共5页Journal of East China University of Science and Technology

基　　金：国家自然科学基金资助项目(No.20106005);中国石化总公司资助项目(合同号201085)。

摘　　要：采用Pd/γ-Al2O3催化剂,在排除扩散影响的条件下,研究了液相苯催化加氢制环己烷的反应动力学。实验测定了反应温度、氢气压力、反应物浓度等因素对反应速率的影响,反应温度研究的范围为393～453K,氢气压力为1.1～3.8MPa。研究结果表明,液相苯加氢反应对苯表现为零级,对氢压表现为一级,反应活化能为43.88kJ/mol。运用该动力学模型对在较低苯浓度下进行的加氢反应进行了预测,预测值与实验值能较好地吻合。Liquid-phase benzene hydrogenation to cyclohexane was studied over Pd/γ-Al_2O_3 catalyst in a regime free of internal and external diffusion limitations. The effects of reaction temperature, hydrogen pressure and reactant concentration on the reaction rate were obtained experimentally between 393 K and 453 K and over a hydrogen pressure range from 1.1 MPa to 3.8 MPa. The result shows that the reaction rate is zero-order in benzene concentration and first-order with respect to hydrogen pressure and the activation energy is 43.88 kJ/mol. The kinetic model was further verified by the experimental data, which were obtained under lower reactant concentration.

关 键 词：液相 苯加氢 环己烷 反应动力学 催化剂 液相 

分 类 号：O624.11[理学—有机化学] TQ231.14[理学—化学]