甲醇转化制低碳烯烃过程中MgZSM-5催化剂失活动力学的研究

STUDY OF DEACTIVATION KINETICS OF MgZSM-5 ZEOLITE IN METHANOL CONVERSION INTO LIGHT-OLEFINS

用微型固定床连续反应器,考察了甲醇转化制低碳烯烃过程中MgZSM-5分子筛催化剂的失活规律。在常压下,分别测定了反应活化能、反应级数及460—500℃范围内的失活反应活化能和失活反应级数。得到的失活动力学速率式为: -γ=4.61×10~5exp(-99.71/(RT)×10~3)C·a -(da)/(dt)=2.42×10~2C^0.059exp(-63.93/(RT)×10~3)

Deactivation kinetics of MgZSM-5 zeolite in methanol conversion into light-olefins was studied in a fixed-bed reactor, under normal pressure. The reaction-orders and activation-energies for both the reaction and deactivation were determined.Deactivation rate equations were obtained:-r=4.61×10~5exp(-(99.71/RT)×10~3)C·a -(da/dt)=2.42×10~2C^(0.959)exp(-(63.93/RT)×10~3)a