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A comparative study on the transalkylation of diisopropylbenzene with benzene over several zeolitic materials in supercritical CO2 and liquid phase

Paper ID Volume ID Publish Year Pages File Format Full-Text
44612 46044 2006 8 PDF Available
Title
A comparative study on the transalkylation of diisopropylbenzene with benzene over several zeolitic materials in supercritical CO2 and liquid phase
Abstract

This work describes the catalysts screening and the analysis of the effect of supercritical carbon dioxide on the transalkylation of diisopropylbenzene with benzene. The catalysts included three acidic commercial zeolites: beta, Y and mordenite with different aluminum contents (e.g. Si/Al molar ratio). Their performance was compared in terms of cumene yield and selectivity, taking into account the competitive isomerization, and the by-products formation. The influence of the Si/Al molar ratio on the catalytic activity was discussed in terms of total acidity and strength of acid sites. Liquid, subcritical and supercritical conditions were comparatively investigated. The results proved that transalkylation rates were not accelerated by the increase in pressure from subcritical to supercritical conditions. Comparing to conventional liquid phase conditions, the use of supercritical CO2 did not result in superior catalytic transalkylation activity for the Y-zeolite. On the contrary, an important improvement in product yield was obtained with the beta and mordenite zeolites. Results were related to reactant mixture mass transport properties and catalysts structure.

Keywords
Beta zeolite; Y-zeolite; Mordenite zeolite; Supercritical carbon dioxide; Transalkylation; Diisopropylbenzene; Benzene; Cumene
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A comparative study on the transalkylation of diisopropylbenzene with benzene over several zeolitic materials in supercritical CO2 and liquid phase
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 312, 8 September 2006, Pages 194–201
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us