S_N2机理甲苯歧化反应脉冲动力学

Pulse Kinetics of S_N2 Mechanism Toluene Disproportionation

本文以氦为载气,在480～540℃及20～100ml/min 范围内,研究了 H-Y 分子筛催化剂上甲苯歧化反应脉冲动力学,导出了基于表面反应为控速步骤的双分子机理脉冲动力学数学模型,并测定了反应的有关动力学参数.认为,甲苯歧化,在本文实验条件下,是按照双分子吸附的S_N2机理进行.

Pulse kinetics of toluene disproportionation on H-Y zeolite catalyst isstudied within the range of 480～540℃ and 20～100ml/min with helium asthe carrier gas.The mathematical model for the bimolecular mechanismpulse kinetics on the basis of surface reaction acting as rate-limiting stepis derived.As the relative kinetic parameters being determined,we suggestthat toluene disproportionation proceed on the S_(N)2 mechanism of bimolecularabsorption under experiment conditions.