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Effect of hydrochlorination and hydrofluorination of H-ZSM-5 on the catalytic hydroconversion reactions of cyclohexene

Paper ID Volume ID Publish Year Pages File Format Full-Text
44351 46016 2006 9 PDF Available
Title
Effect of hydrochlorination and hydrofluorination of H-ZSM-5 on the catalytic hydroconversion reactions of cyclohexene
Abstract

Modifying the acid sites (number and strength) of H-ZSM-5 zeolite via doping with 3.0 wt.% HCl or HF for being used as catalysts for the hydroconversion of cyclohexene (CHE) in a flow-type fixed-bed reactor operated atmospherically in H2 carrier gas at temperatures of 50–400 °C. The acid sites strength distribution in these zeolite forms was evaluated using temperature programmed desorption (TPD) of presorbed ammonia in a differential scanning calorimeter (DSC). Either HCl or HF incorporation has increased both acid sites number and strength in the zeolite to varying extents. Hydrochlorination enhanced the acid sites number in the zeolite to a larger extent than hydrofluorination, whereas, the latter enhanced the acid sites strength to a larger extent than hydrochlorination. Nevertheless, not only the acid catalysed reactions; i.e., isomerisation of the six-membered-ring of CHE to the five-membered ring compounds (methylcyclopentenes (MCPEs) plus methylcyclopentane (MCPA)) and hydrocracking reactions to lower molecular weight components, were enhanced via both hydrohalogenation treatments of the zeolite, but also hydrogenation of CHE to cyclohexane and MCPEs to MCPA and dehydrogenation of CHE to cyclohexadienes (CHDEs) plus benzene were also enhanced.

Keywords
Cyclohexene; Hydroconversion; H-ZSM-5; Zeolitel; Catalyst
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Effect of hydrochlorination and hydrofluorination of H-ZSM-5 on the catalytic hydroconversion reactions of cyclohexene
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 297, Issue 1, 4 January 2006, Pages 102–110
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
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