无机胺合成的HZSM-5催化间二甲苯异构化脉冲动力学研究

Pulse Catalytic Isomerization Kinetics of m-Xylene on HZSM-5 Synthesized Inorganic Amine

利用脉冲法研究了间二甲苯在用无机胺合成的HZSM-5沸石上的催化异构化动力学行为.在758～801 K温度范围内,载气流量22～60 ml/min,压力0.2～0.3 MPa,反应是表观一级反应,表观活化能119.2 kJ/mol,气相色谱保留体积法测得间二甲苯的吸附热为47.2 kJ/mol,故得到表面反应的活化能为166.4 kJ/mol.

The ZSM-5 zeolite was synthesized with inorganic amine plate. The data of Pulse catalytic isomirization of m-xylene on the HZSM-5 were measured in various temperatures and carrying gas flow rates. Experimental results showed that the main conversion process of m-xylene on the HZSM-5 zeolite was unimolecular transfer reaction appearing as a first order kinetic characterization in the reaction conditions of temperture range of 758～801 K, carrying gas flow rate and pressure in the region of 22～60 ml/min and 0.2～0.3 Mpa respectively. The apparent activation energy, the adsorption heat and the activation energy of surface reaction were 119.2 kJ/mol, 47.2 kJ/mol and166.4 kJ/mol respectively.