Journal
CHEMICAL ENGINEERING SCIENCE
Volume 58, Issue 23-24, Pages 5239-5249Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ces.2003.08.020
Keywords
catalyst deactivation; kinetics; zeolites; fixed bed; MTO process; reaction-regeneration cycles
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The kinetics of the reversible and irreversible deactivation of the catalyst (based on a HZSM-5 zeolite) in the methanol to olefins process, in the 673-773 K range, has been obtained from experimental results in fixed-bed reactor operating under reaction-regeneration cycles. The total activity remaining in the catalyst is quantified as the product of a function for recoverable activity due to coke deposition (which depends on the composition of the lumps of the kinetic scheme and includes the attenuating effect of water on coke deposition) and a function for the non-recoverable activity due to dealumination (caused by water at high temperature). (C) 2003 Elsevier Ltd. All rights reserved.
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