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Sol–gel synthesis combined with solid–solid exchange method, a new alternative process to prepare improved Pd/SiO2–Al2O3 catalysts for methane combustion

Paper ID Volume ID Publish Year Pages File Format Full-Text
49980 46775 2012 5 PDF Available
Title
Sol–gel synthesis combined with solid–solid exchange method, a new alternative process to prepare improved Pd/SiO2–Al2O3 catalysts for methane combustion
Abstract

Various PdO–support interactions could be obtained on the Pd/SiO2–Al2O3 catalyst prepared by the method adopted in this work. Higher palladium dispersion, lower palladium reduction temperature and better catalytic activity in methane combustion are obtained on the Pd/SiO2–Al2O3 catalyst when PdO–Si interaction is favoured than PdO–Al interaction. In addition, compared to the Pd/SiO2 and the Pd/Al2O3 catalysts, higher catalytic activity is obtained on the Pd/SiO2–Al2O3 solids due to their moderate acidity strength.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Pd/SiO2-Al2O3 catalyst is prepared by combining sol-gel and solid-solid exchange. ► PdO-Si interaction is favoured than PdO-Al one on the Pd/SiO2-Al2O3 catalyst. ► Better dispersion and reducibility are obtained when PdO-Si interaction is favoured. ► PdO-Si interaction is more beneficial for methane combustion than PdO-Al one. ► Pd/SiO2-Al2O3 catalysts are more active than Pd/SiO2 and Pd/Al2O3 ones.

Keywords
Pd/SiO2–Al2O3 catalyst; PdO–support interaction; Methane combustion
First Page Preview
Sol–gel synthesis combined with solid–solid exchange method, a new alternative process to prepare improved Pd/SiO2–Al2O3 catalysts for methane combustion
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 27, 5 October 2012, Pages 109–113
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis