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Carbon formation in catalytic partial oxidation of methane on platinum : model studies on a polycrystalline Pt foil
Publikationstyp
Journal Article
Date Issued
2012-02-12
Sprache
English
Author(s)
Journal
Volume
181
Issue
1
Start Page
177
End Page
183
Citation
Catalysis Today 181 (1): 177-183 (2011)
Publisher DOI
Scopus ID
Publisher
Elsevier
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.
Subjects
Carbon
Catalytic partial oxidation
Methane
Platinum
Raman spectroscopy
Synthesis gas
DDC Class
540: Chemistry