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The tremendous effect of trace amounts of Rh on redox and catalytic properties of CeO2–TiO2 and Al2O3 in CH4 partial oxidation

Paper ID Volume ID Publish Year Pages File Format Full-Text
50094 46779 2012 5 PDF Available
Title
The tremendous effect of trace amounts of Rh on redox and catalytic properties of CeO2–TiO2 and Al2O3 in CH4 partial oxidation
Abstract

Trace amounts of Rh (0.005 wt.%) were found to strongly improve both overall and surface reducibility of Al2O3 and CeO2–TiO2 prepared via hardcast- and cellulose-templating methods. The latter approach is more suitable for tuning surface reducibility as proven by H2-TPR tests due to favored stabilization of surface Rh species. High surface reducibility of support is an important activity- and selectivity-governing factor in the partial oxidation of methane to syngas, because it promotes reaction-induced transformation of RhOx species to metallic Rh. Close-to-equilibrium and stable syngas production was achieved over cellulose templated Rh(0.005 wt.%)–CeO2–TiO2.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Rh traces (0.005wt%) effect surface and/or bulk reducibility of Al2O3 and CeO2–TiO2. ► Preparation method determines concentration of active Rh surface species. ► Lowest surface reduction temperature via cellulose templating. ► Improved bulk reduction via exo templating. ► High surface reducibility is required for partial oxidation of CH4 to CO and H2.

Keywords
CeO2–TiO2; Rhodium; Reduction; Templating method; Methane; Syngas
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The tremendous effect of trace amounts of Rh on redox and catalytic properties of CeO2–TiO2 and Al2O3 in CH4 partial oxidation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 18, 10 February 2012, Pages 121–125
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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Price after discount Only $4.95
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