Deactivation Model of the Catalyst Used in Methanol to Olefin Process

doi:10.3724/SP.J.1095.2014.30297

Chinese Journal of Applied Chemistry

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Deactivation Model of the Catalyst Used in Methanol to Olefin Process

LI Zhi, SUN Qiwen^* , LIU Jisen, ZHANG Zongsen

(Shanghai Yankuang Research and Development Company of Energy Science and Technology,Ltd.;
State Key Laboratory of Coal Liquefaction and Coal Chemical Industry,Shanghai 201203,China)

Received:2013-06-17 Revised:2013-08-13 Published:2014-04-10 Online:2014-04-10
Contact: SUN

Abstract

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.

Key words: methanol to olefin, deactivation function, SAPO-34, catalyst

CLC Number:

O643

LI Zhi, SUN Qiwen*,LIU Jisen, ZHANG Zongsen. Deactivation Model of the Catalyst Used in Methanol to Olefin Process[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2014.30297.

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Deactivation Model of the Catalyst Used in Methanol to Olefin Process

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