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Effect of Ce addition on Cr/γ-Al2O3 catalysts for methane catalytic combustion

Paper ID Volume ID Publish Year Pages File Format Full-Text
50128 46781 2013 4 PDF Available
Title
Effect of Ce addition on Cr/γ-Al2O3 catalysts for methane catalytic combustion
Abstract

Cerium modified and chromium-based catalysts using nano-γ-Al2O3 as the carrier were prepared via incipient wetness impregnation method and investigated for the catalytic combustion of methane (CH4). The Cr-based catalysts promoted with 3 wt.% Ce displayed the most effective catalytic activity among all catalysts investigated. In addition, Ce significantly improved the catalytic performance of CH4 combustion by increasing the amount of reaction site [CrO4]ads species on the surface of Cr-based catalysts. Introduction of Ce content also restrained the deactivation of catalysts at high calcination temperature. Cr-based catalysts modified with cerium seem to be a promising cheap and low-temperature catalyst for CH4 combustion.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Cr-based catalysts modified with cerium exhibited excellent catalytic activity on methane combustion. ► Ce introduction can effectively decrease the combustion temperature and increase anti-sintering function. ► Species Cr6 + is the active site for CH4 oxidation. ► The conversion from Cr3 + and Cr6 + into one another was the catalytic cycle.

Keywords
Methane; Chromium-based catalysts; Catalytic combustion; Catalytic cycle
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Effect of Ce addition on Cr/γ-Al2O3 catalysts for methane catalytic combustion
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 35, 5 May 2013, Pages 36–39
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us