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Effect of post-calcination thermal treatment on acid properties and pores structure of a mesoporous niobium–tungsten oxide

Paper ID Volume ID Publish Year Pages File Format Full-Text
55167 47042 2012 5 PDF Available
Title
Effect of post-calcination thermal treatment on acid properties and pores structure of a mesoporous niobium–tungsten oxide
Abstract

Effect of post-calcination thermal treatment on acid properties and pores structure of a mesoporous niobium–tungsten oxide was examined. Mesoporous Nb–W oxides treated by high temperature calcination from 673 up to 873 K exhibited a significant increase in pore size from 4.8 to 9.2 nm, a decrease in pore volume, surface area and acid amount, while the acid strength and density remained almost constant. A remarkable improvement in acid catalysis was observed for Friedel–Crafts alkylation and hydrolysis of disaccharide where the turnover frequency for both reactions increased continuously with calcination temperature.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (161 K)Download as PowerPoint slideHighlights► Mesoporous Nb–W oxides treated by high temperature calcination. ► A significant increase in pore size and a decrease in pore volume, surface area, acid amount by the calcination. ► The acid strength and density remained almost constant. ► The turnover frequency for both Friedel–Crafts alkylation and hydrolysis increased with calcination temperature.

Keywords
Solid acid; Porous metal oxide; Friedel–Crafts alkylation; Hydrolysis
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Effect of post-calcination thermal treatment on acid properties and pores structure of a mesoporous niobium–tungsten oxide
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 192, Issue 1, 30 September 2012, Pages 144–148
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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Full-text PDF Download
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