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Enhanced catalytic activity over vanadium-containing silylated SBA-15 catalysts for styrene epoxidation and benzene hydroxylation

Paper ID Volume ID Publish Year Pages File Format Full-Text
39717 45832 2014 6 PDF Available
Title
Enhanced catalytic activity over vanadium-containing silylated SBA-15 catalysts for styrene epoxidation and benzene hydroxylation
Abstract

•Vanadium-containing silylated SBA-15 catalysts were synthesized.•The styrene epoxidation and benzene hydroxylation were enhanced by silylation.•The affinity of the reactants to the catalyst surface was modified by silylation.•V/DMDS-1.0/SBA-15 showed remarkable catalytic activity and good stability.

A series of mesoporous V/DMDS-x/SBA-15 catalysts with different silylation degree were prepared by post-grafting of dimethyldichlorosilane (DMDS) onto SBA-15, followed by introduction of vanadium species via impregnation method. The silylated sample showed better catalytic activity than the non-silylated one in both styrene epoxidation and benzene hydroxylation reactions. Styrene conversion of 67.1% and styrene oxide selectivity of 88.5% with tert-butyl hydroperoxide (TBHP), and benzene conversion of 34.1% and phenol selectivity of 93.2% with H2O2 were obtained over the V/DMDS-1.0/SBA-15 catalyst. The considerably improved activity was attributed to the optimized affinity between the catalyst surface and the reactants.

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Keywords
Styrene epoxidation; Benzene hydroxylation; Silylation; Vanadium; SBA-15
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Enhanced catalytic activity over vanadium-containing silylated SBA-15 catalysts for styrene epoxidation and benzene hydroxylation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 477, 5 May 2014, Pages 141–146
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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