Heterogeneous methanation: in situ infrared spectroscopic study of Ru/Al/sub 2/O/sub 3/ during the hydrogenation of CO

Journal Article · Thu Jun 30 00:00:00 EDT 1977 · J. Catal.; (United States)

OSTI ID:7080855

Dalla Betta, R A.D.; Shelef, M

The synthesis of hydrocarbons from CO and H/sub 2/ was studied on a high surface area Ru/Al/sub 2/O/sub 3/ catalyst using transmission infrared spectroscopy. At 523/sup 0/K in the presence of CO only, a carbonyl stretching band is observed at 2043 cm/sup -1/ and is attributed to CO adsorbed on Ru. In a flowing gas stream of H/sub 2//CO ratio equal to 3, the carbonyl band appears at 1996 cm/sup -1/ and is only sightly reduced in intensity compared to CO only. Other infrared bands are attributed to adsorbed hydrocarbons, adsorbed surface formate species and adsorbed water. These latter materials are inactive reaction products as shown by isotope substitution experiments and are apparently adsorbed on the alumina support. At higher temperatures, a deactivation of the catalyst is associated with a decrease in the intensity of the carbonyl band and a shift to lower frequencies. This change is not reversible upon cooling the Ru/Al/sub 2/O/sub 3/ to 523/sup 0/K, but can be reversed by a reduction in H/sub 2/ at 723/sup 0/K.

• Research Organization: Ford Motor Co., Dearborn, MI
• OSTI ID: 7080855
• Journal Information: J. Catal.; (United States), Vol. 48:1-3
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
CARBON MONOXIDE
METHANATION
HYDROCARBONS
SYNTHESIS
HYDROGEN
CHEMICAL REACTIONS
RUTHENIUM
CATALYTIC EFFECTS
INFRARED SPECTRA
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CRYOGENIC FLUIDS
ELEMENTS
FLUIDS
METALS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
REFRACTORY METALS
SPECTRA
TRANSITION ELEMENTS
090121* - Hydrocarbon Fuels- Chemical Synthesis- (1976-1989)