Influence of the support on CO2 methanation over Ru catalysts: an FT-IR study |
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| Authors: | S Scirè C Crisafulli R Maggiore S Minicò S Galvagno |
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| Affiliation: | (1) Dipartimento di Scienze Chimiche, Università di Catania, V. le A, Doria 6, I-95125 Catania, Italy;(2) Dipartimento di Chimica Industriale, Università di Messina, Salita Sperone 31, I-98166 Messina, Italy |
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| Abstract: | The hydrogenation of CO2 to methane has been investigated over Ru catalysts supported on zeolite (H-ZSM-5) and on silica. Supported Ru catalysts were
very active for the hydrogenation of CO2. Ru/ZSM-5 was more selective to methane than Ru/SiO2. On the basis of FT-IR spectra of CO and CO2 adsorbed on the catalysts, it has been suggested that this behaviour can be related to a higher positive polarization of
ruthenium on the zeolite. This leads to a weaker Ru–CO bond on the H-ZSM-5-supported sample with a corresponding increase
of the hydrogen surface coverage that favours the transformation of the intermediate CO to methane.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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| Keywords: | methanation carbon dioxide H-ZSM-5 ruthenium FT-IR spectroscopy |
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