INFLUENCE OF THE SUPPORT ON CO2 METHANATION OVER RU CATALYSTS - AN FT-IR STUDY

Authors
SCIRE S CRISAFULLI C MAGGIORE R MINICO S GALVAGNO S
Citation
S. Scire et al., INFLUENCE OF THE SUPPORT ON CO2 METHANATION OVER RU CATALYSTS - AN FT-IR STUDY, Catalysis letters, 51(1-2), 1998, pp. 41-45
Citations number
28
Categorie Soggetti
Chemistry Physical
Journal title
Catalysis letters → ACNP
ISSN journal
1011372X
Volume
51
Issue
1-2
Year of publication
1998
Pages
41 - 45
Database
ISI
SICI code
1011-372X(1998)51:1-2<41:IOTSOC>2.0.ZU;2-#
Abstract
The hydrogenation of CO2 to methane has been investigated over Ru cata lysts supported on zeolite (H-ZSM-5) and on silica. Supported Ru catal ysts 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 be haviour 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-suppo rted sample with a corresponding increase of the hydrogen surface cove rage that favours the transformation of the intermediate CO to methane .