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Various hexagonally ordered mesoporous silicas as supports for chromium species—The effect of support on surface properties

Paper ID Volume ID Publish Year Pages File Format Full-Text
42617 45933 2009 6 PDF Available
Title
Various hexagonally ordered mesoporous silicas as supports for chromium species—The effect of support on surface properties
Abstract

Hexagonally ordered mesoporous silicas of MCM-41 type, SBA-3 and SBA-15 were applied as supports for chromium species introduced via incipient wetness impregnation. The samples were characterised by XRD, N2 adsorption, UV–vis spectroscopy, H2-TPR, and a test reaction (acetonylacetone cyclisation). Their catalytic performance in sulphurisation of methanol was studied. Formation of active centres on mesoporous silica supports as a result of the post-synthesis modification with CrO3 was found to depend strongly on the preparation conditions used in the synthesis of the support. These conditions determined not only the textural/structural parameters but also surface properties of the support, important for the anchoring of metal species which is crucial for catalytic activity.

Graphical abstractHexagonally ordered mesoporous silicas were applied as supports for chromium species introduced via incipient wetness impregnation. Formation of active centres as a result of the post-synthesis modification with CrO3 was found to depend strongly on the preparation conditions used in the synthesis of the support.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
MCM-41; SBA-3; SBA-15; Basicity; Acetonylacetone cyclisation; Methanol sulphurisation
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Various hexagonally ordered mesoporous silicas as supports for chromium species—The effect of support on surface properties
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 365, Issue 1, 15 August 2009, Pages 135–140
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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