ZnCl2/粘土-SA01催化合成二苯甲烷反应动力学研究

在ZnCl2/粘土-SA01催化剂上合成了二苯甲烷,考察了负载量、苯/苄基氯摩尔比、催化剂用量、反应温度和时间对该反应的影响,研究了以ZnCl2/粘土-SA01为催化剂合成二苯甲烷的反应动力学,为探讨其反应机理和研究烷基化反应动力学提供了依据.结果表明,温度在303-318K时,本征动力学方程为r=kZnCl2/粘土-SA01]0.8C6H6]C6H5CH2Cl],属二级反应,表观反应活化能为88.6kJ/mol;在328-353K时,其本征动力学方程为r=kZnCl2/粘土-SA01]0.1,反应属零级反应,表观活化能为52.8kJ/mol.

Kinetics Study on Diphenylmethane Synthesis Catalyzed by ZnCl2/Clay-SA01

Diphenylmethane was synthesized in the presence of a new environmentally friendly catalyst ZnCl2/ Clay-SA01. The effects of loading amount, the molar ratio of benzene to benzyl chloride, amount of catalyst used, reaction temperature and time were investigated. Based on these experiments, the kinetics and mechanism of the reaction were studied. The results show that the reaction is the second order kinetics at 303--318 K. The kinetic equation obtained is r = k ZnCl2/Clay-SA01 ] ^0.8 C6H6 ] C6 H5 CH2 Cl ] , with an apparent activation energy 88.6 kJ/mol. However, the reaction is the zero order kinetics at 328-353 K. The kinetic equation obtained is r = k ZnCl2/Clay-SA01 ] 0.1 with the apparent activation energy 52. 8 kJ/mol. The model should be used to provide a theoretical explanation of reaction mechanism and to be applied to the development of industrial process.