【摘要】 以负载氯化亚铜为催化剂,研究了苯乙烯和四氯化碳加成反应的动力学,为工业反应过程的开发和操作提供了理论依据。在本实验条件下,催化剂的粒径为10 8～10 7m,内扩散影响可以忽略。当搅拌速度大于210 r min 1时,外扩散影响基本消除,反应进入动力学控制区。系统地测定了65～75℃下的反应动力学数据。依据自由基加成反应机理和单活性位吸附的假设,建立了动力学模型,rA=K[CA][CB]+k1[CB]。对实验数据进行非线性拟合,得到反应动力学模型参数。计算得到其控制步骤解离吸附的反应活化能为1.11×105kJ mol 1。动力学模型与实验数据吻合较好,在实验范围内可信度较高。更多还原

【Abstract】 The kinetics of the addition reaction of carbon tetrachloride with styrene was investigated in the presence of immobilized cuprous chloride catalyst.As the CuCl / carbon nanotuble catalyst with the particle size of 10-8~10-7m was used and the stirring rates of the reaction were kept over 210 r·min-1,both the effects of internal and external diffusion could be ignored,and the reaction was controlled only by the kinetics of the addition reaction.The kinetic model,-rA=K + k1,was established based on free radical addition reaction mechanism and the assumption of single active site adsorption,which agrees well with the kinetic data measured in the temperature range of 65℃ to 75℃.The kinetic parameters were obtained by non-linear fitting,and the activation energy of the dissociative adsorption,which is the control step of the addition reaction,is 1.11×105 kJ·mol-1.The results obtained in this study are useful for the explanation of the addition reaction and the development of its industrial process.更多还原