Heterogeneous methanation: initial rate of CO hydrogenation on supported ruthenium and nickel

Journal Article · Tue Oct 01 00:00:00 EDT 1974 · J. Catal.; (United States)

OSTI ID:7233197

Dalla Betta, R A; Piken, A G; Shelef, M

The initial rates of the reaction of carbon monoxide and hydrogen were determined at 200/sup 0/ to 350/sup 0/C on two types of alumina-supported ruthenium, alumina-supported ruthenium--lanthanum, and zirconia-supported nickel, and were expressed as turnover numbers. The reaction was structure insensitive, i.e., independent of metal particle size. The activation energies for methane and total hydrocarbon formation were 24 and 17 kcal/mole, respectively, on ruthenium, and 28 and 20 kcal/mole on nickel. Turnover numbers were about twice as high on nickel as on ruthenium. The reaction order was negative for carbon monoxide and positive for hydrogen which is indicative of high carbon monoxide coverage and possibly of hydrogen adsorption or surface reactions as rate controlling step.

• OSTI ID: 7233197
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 35:1; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
ACTIVATION ENERGY
ALKANES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CRYOGENIC FLUIDS
ELEMENTS
ENERGY
FLUIDS
HYDROCARBONS
HYDROGEN
KINETICS
METALS
METHANATION
METHANE
NICKEL
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
REACTION KINETICS
REFRACTORY METALS
RUTHENIUM
SYNTHESIS
TRANSITION ELEMENTS