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Characterization of surface processes at the Ni-based catalyst during the methanation of biomass-derived synthesis gas: X-ray photoelectron spectroscopy (XPS)

Paper ID Volume ID Publish Year Pages File Format Full-Text
44101 46003 2007 11 PDF Available
Title
Characterization of surface processes at the Ni-based catalyst during the methanation of biomass-derived synthesis gas: X-ray photoelectron spectroscopy (XPS)
Abstract

Surface modifications during the production of methane from reformer synthesis gas over a commercial Ni/Al2O3 catalyst were investigated by quasi-in situ X-ray photoelectron spectroscopy (XPS) and other surface analytical techniques. Experiments of methanation reaction were done in the high pressure cell (HPC) integrated in the XPS system and under fixed-bed conditions. The interaction of the different reformer biomass-derived synthesis gas on the surface properties of the catalyst and on its activity under methanation conditions were studied on a nanoscopic level. Detailed description of changes in metal particle morphology and carbon deposit is presented. A mechanism of C-whiskers formation during long exposure to methanation conditions is described. The role of additional components in the gas mixture, such as CO2, H2O, CH4, C2H4, C2H2, C3H6 and C2H6, were studied in details. Furthermore, role of different nickel compounds such as oxides, hydroxides, carbides and carbonates are discussed.

Graphical abstractSurface modifications of Ni/Al2O3 catalyst during the production of methane from reformer synthesis gas were investigated by quasi in situ XPS. The influence of biomass-derived synthesis gas compounds on the surface properties of the catalyst and on its activity under methanation conditions was studied. A mechanism of carbon whiskers formation during long exposure to methanation conditions is also described. Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Nickel catalyst; γ-Al2O3; XPS; Methanation; Carbon whiskers; Fouling
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Characterization of surface processes at the Ni-based catalyst during the methanation of biomass-derived synthesis gas: X-ray photoelectron spectroscopy (XPS)
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 329, 1 October 2007, Pages 68–78
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
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Any Questions? feel free to contact us