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Hydrothermal activation of silver supported alumina catalysts prepared by sol–gel method: Application to the selective catalytic reduction (SCR) of NOx by n-decane

Paper ID Volume ID Publish Year Pages File Format Full-Text
45790 46422 2013 7 PDF Available
Title
Hydrothermal activation of silver supported alumina catalysts prepared by sol–gel method: Application to the selective catalytic reduction (SCR) of NOx by n-decane
Abstract

2 wt% Ag– and 2 wt% Ag–1.5 wt% Nb mesoporous alumina catalysts were prepared by non-hydrolytic sol–gel process. Silver accessibility is enhanced by calcination at high temperature. By performing calcination in presence of water vapour, silver particles are well dispersed and interact more strongly with the alumina surface and activity in n-decane-SCR of NOx is greatly improved. Moreover, the addition of niobium in the starting material leads to more efficient catalysts and enhances mainly the low temperature activity.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The preparation of mesoporous silver alumina catalysts by sol–gel process is reported. ► Most active catalysts were achieved after hydrothermal treatment at high temperature. ► Water vapour is a redispersing agent of silver particles at high temperature. ► The addition of niobium increases the density of acid sites. ► A low temperature active catalyst has been designed for the HC-SCR.

Keywords
Hydrothermal activation; Sol–gel catalysts; HC-SCR; Nitrogen monoxide; n-Decane; Supported alumina; Silver
First Page Preview
Hydrothermal activation of silver supported alumina catalysts prepared by sol–gel method: Application to the selective catalytic reduction (SCR) of NOx by n-decane
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 134–135, 2 May 2013, Pages 258–264
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis