Synthesis gas reactions using catalysts formed by oxidizing Ni-containing intermetallic compounds

Conference · Tue Jan 01 04:00:00 EST 1980 · Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States)

OSTI ID:6153236

Imamura, H; Wallace, W E

Catalysts for converting synthesis gas to methane were prepared by oxidizing powdered LaNi/sub 5/, CeNi/sub 5/, PrNi/sub 5/, NdNi/sub 5/, HoNi/sub 5/, ErNi/sub 5/, or ThNi/sub 5/ and tested at 150/sup 0/-300/sup 0/C. Oxidized CeNi/sub 5/ and ThNi/sub 5/ showed exceptional activity, i.e., turnover numbers (molecules of methane produced per site per second) at 205/sup 0/C about an order of magnitude higher than conventional silica- or alumina-supported nickel catalysts. The catalysts prepared by oxidation were quite good, while those prepared by the conventional impregnation procedure were very poor. For the oxidized CeNi/sub 5/ and ThNi/sub 5/, activity increased with increase in extent of oxidation. There was a good correlation between carbon monoxide chemisorption and activity. Most of the hydrocarbon products were methane. Selectivity depended on the nature of the rare earth or actinide in the precursor compound. Oxidized LaNi/sub 5/ had very high selectivity for methane formation. The catalyst were examined by X-ray diffraction, ESCA, and carbon monoxide chemisorption techniques.

• Research Organization: Univ. of Pittsburg
• OSTI ID: 6153236
• Report Number(s): CONF-800303-
• Conference Information: Journal Name: Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States) Journal Volume: 25:2
• Country of Publication: United States
• Language: English

Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
ALKANES
ALLOYS
CATALYSTS
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
FLUIDS
GASES
HYDROCARBONS
INTERMETALLIC COMPOUNDS
METHANATION
METHANE
NICKEL COMPOUNDS
ORGANIC COMPOUNDS
OXIDATION
SYNTHESIS
SYNTHESIS GAS
TRANSITION ELEMENT COMPOUNDS