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Stabilization of ZSM-5 zeolite catalysts for steam catalytic cracking of naphtha for production of propene and ethene

Paper ID Volume ID Publish Year Pages File Format Full-Text
40983 45873 2012 14 PDF Available
Title
Stabilization of ZSM-5 zeolite catalysts for steam catalytic cracking of naphtha for production of propene and ethene
Abstract

In order to increase ethene and propene, naphtha steam catalytic cracking has been considered. The cracking of C5–C12n-alkanes with ZSM-5 has been studied in absence and in presence of steam and the influence of the operation variables was studied. Irreversible catalyst deactivation by dealumination also occurs in the reactor when the cracking is carried out in the presence of steam. To diminish steam deactivation, the influence of zeolite Si/Al framework and a postsynthesis treatment by phosphorous have been studied and optimized. Much more stable catalyst can be achieved that result in an increase in activity without penalty for production of ethene and propene.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (52 K)Download as PowerPoint slideHighlights► Dealumination of ZSM-5 zeolite occurs in steam catalytic cracking of naphtha. ► Si/Al ratio has a little influence on the rate of deactivation due to dealumination. ► Postsynthesis impregnation with phosphorous slow down the zeolite deactivation. ► Optimum amount of phosphorous depends on the Al content of zeolite. ► Introduction of phosphorous affects little the selectivities to ethene and propene.

Keywords
Steam catalytic cracking (SCC); Zeolite dealumination; ZSM-5 hydrothermal stability; Phosphorous stabilized zeolite; Alkenes production; Olefins production; Si/Al ratio
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Stabilization of ZSM-5 zeolite catalysts for steam catalytic cracking of naphtha for production of propene and ethene
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 421–422, 16 April 2012, Pages 121–134
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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Price after discount Only $4.95
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Any Questions? feel free to contact us