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Evidences of the in situ generation of highly active Lewis acid species on Zr-SBA-15

Paper ID Volume ID Publish Year Pages File Format Full-Text
42389 45923 2009 7 PDF Available
Title
Evidences of the in situ generation of highly active Lewis acid species on Zr-SBA-15
Abstract

Zr-SBA-15 materials were synthesized and the activity of the catalysts was investigated in the alkylation of aromatics with benzyl chloride. While Zr-SBA-15 materials needed more than 12 h of reaction to achieve quantitative conversion, an unusually high catalytic activity was observed for reused materials that provided quantitative conversions of starting material in less than 1 h. This dramatic increase in activity observed for reused and/or treated Zr-SBA-15 in the alkylation of aromatics with benzyl chloride points to the formation of novel highly acidic Lewis ClxZr–O–Si species on the catalyst surface.

Graphical abstractThe dramatic increase in activity of reused/treated Zr-SBA-15 in the alkylation of aromatics with benzyl chloride points to the formation of novel highly acidic Lewis ClxZr–O–Si species on the catalyst surface. Such materials provided quantitative conversions of starting material in less than 1 h compared to more than 12 h needed for the parent Zr-SBA-15.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Lewis acidity; In situ generation of acid sites; Zr-SBA-15; Alkylation of aromatics; Surface chemistry
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Evidences of the in situ generation of highly active Lewis acid species on Zr-SBA-15
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 371, Issues 1–2, 15 December 2009, Pages 85–91
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
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Any Questions? feel free to contact us