Abstract：Reaction kinetic equations were obtained from the kinetic study of methanol to olefins (MTO) on SAPO-34 catalyst in a fixed-bed isothermal integral reactor. Based on the above results many factors that could influence the catalytic activity were analyzed and the reliability of the kinetic model was tested by the reactor simulation in the fixed-bed reactor. The results showed that the catalytic activity decreases along with the increase of methanol contact time, a characteristics of parallel deactivation; existing water in the MTO system could effectively slow down the catalyst deactivation whereas this effect would diminish when a large amount of methanol accumulates in the system. A good agreement between the model prediction from the obtained kinetics and experimental data had been reached.
