Catalytic carbon dioxide methanation by alumina-supported mono- and polynuclear ruthenium carbonyls
The catalytic activity and selectivity toward methanation of carbon dioxide using several alumina-supported ruthenium-cluster-derived catalysts have been studied over the temperature range 180-250 /sup 0/C. The ruthenium clusters used in these investigations include Ru/sub 3/(CO)/sub 12/, KHRu/sub 3/(CO)/sub 11/, (PPN)(HCO/sub 2/Ru/sub 3/(CO)/sub 10/), H/sub 4/Ru/sub 4/(CO)/sub 12/, KH/sub 3/Ru/sub 4/(CO)/sub 12/, (PPN)(H/sub 3/Ru/sub 4/(CO)/sub 12/), and Ru/sub 6/-C(CO)/sub 17/ (PPN = bis(triphenylphosphine)nitrogen(1+)). Comparative studies were made with the mononulcear complexes RuCl/sub 3/ and Ru(CO)/sub 5/. The latter species provides a low-valent, organometallic, mononuclear ruthenium source. Catalysts were supported by impregnation over alumina (partially dehydroxylated at 150 /sup 0/C in vacuo) and activated in hydrogen at 200/sup 0/C. Catalyst characterization included diffuse-reflectance infrared spectroscopy, surface area determination, oxygen chemisorption, and electron microscopy. 38 references, 9 figures, 3 tables.
- Research Organization:
- Texas A and M Univ., College Station
- OSTI ID:
- 5645076
- Journal Information:
- Inorg. Chem.; (United States), Vol. 25:10
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINIUM OXIDES
CATALYTIC EFFECTS
CARBON DIOXIDE
METHANATION
CARBONYLS
SURFACE PROPERTIES
CATALYSTS
CATALYSIS
OXYGEN
CHEMISORPTION
RUTHENIUM COMPLEXES
ELECTRON MICROSCOPY
EXPERIMENTAL DATA
HIGH TEMPERATURE
INFRARED SPECTRA
SURFACE AREA
TEMPERATURE DEPENDENCE
ALUMINIUM COMPOUNDS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COMPLEXES
DATA
ELEMENTS
INFORMATION
MICROSCOPY
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
SEPARATION PROCESSES
SORPTION
SPECTRA
TRANSITION ELEMENT COMPLEXES
090121* - Hydrocarbon Fuels- Chemical Synthesis- (1976-1989)