Abstract
The change of activity of the SAPO-34 zeolite catalyst in the methanol to olefin process( MTO) was studied after the catalyst started to lose activity in the fixed-bed isothermal integral reactor. The effect of temperature,space speed and time on stream on the change of catalyst activity was investigated. The deactivation function showed a good agreement with the experimental data. By analyzing the deactivation function,the relations between time when the deactivation speed was fast and both temperature and space velocity were obtained. The deactivation process obeyed the deactivation mechanism on the inhomogeneous surface. After the SAPO-34 zeolite started to lose activity,the effect of deactivation time was greater than the effect of space speed and reaction temperature.
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