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Carbon formation in catalytic partial oxidation of methane on platinum: Model studies on a polycrystalline Pt foil

Paper ID Volume ID Publish Year Pages File Format Full-Text
55456 47053 2012 7 PDF Available
Title
Carbon formation in catalytic partial oxidation of methane on platinum: Model studies on a polycrystalline Pt foil
Abstract

A polycrystalline Pt foil has been investigated as model catalyst in methane catalytic partial oxidation to synthesis gas. It is demonstrated that a substantial amount of carbonaceous deposits forms on the Pt foil upon reaction light-off blocking a large fraction of Pt surface atoms. By using in situ Raman spectroscopy and quantitative spectral analysis the evolution and spatial distribution of these carbonaceous compounds with reaction temperature and reaction time have been characterized. The chemical composition of the carbon material changes from highly reactive and strongly disordered directly after reaction light-off to highly ordered, oxidation and steam reforming resistant after several hours time on stream at 800 °C reaction temperature. Remarkably the carbon distribution at the Pt surface was found to be inhomogeneous and related to the nature of the microcrystals forming the polycrystalline foil in a yet unknown manner.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (266 K)Download as PowerPoint slideHighlights► Carbon is formed on platinum in catalytic partial oxidation of methane. ► We study carbon formation by in situ Raman spectroscopy. ► Amorphous Carbon is formed upon reaction light-off and transforms into graphitic carbon with time on stream. ► The graphitic carbon is oxidation resistant and blocks Pt atoms for catalysis. ► Carbon formation is inhomogeneous on a polycrystalline Pt foil.

Keywords
Catalytic partial oxidation; Methane; Synthesis gas; Platinum; Carbon; Raman spectroscopy
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Carbon formation in catalytic partial oxidation of methane on platinum: Model studies on a polycrystalline Pt foil
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 181, Issue 1, 12 February 2012, Pages 177–183
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
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