Borided metal catalysts in methanation of carbon monoxide
Unsupported metal borides were prepared by reduction at 273 to 300 K of Ni/sup II/ and Co/sup II/ by sodium borohydride in aqueous and ethanolic solvents in the presence and absence of noble metal promoters. These materials were further activated by H/sub 2/ reduction at 675 to 725 K which resulted generally in borided metals having higher metal: boron ratios than commonly encountered in the chemically reduced materials. Chemical, physical, and catalytic properties were determined by chemical analysis, BET surface area measurements, H/sub 2/ adsorption measurements, and reactor studies of methanation activity/selectivity properties at 1 atm and 475 to 675 K. Though generally slightly less active and selective than commercial Raney nickel, borided nickel catalysts are nevertheless very effective methanation catalysts compared to pure nickel. Borided cobalt is apparently as active as Raney nickel on a site basis but less selective for CH/sub 4/ production. Ruthenium- and rhodium-promoted nickel borides are slightly more active and about as selective for methane production as unsupported nickel.
- Research Organization:
- Brigham Young Univ., Provo, UT
- OSTI ID:
- 6579046
- Journal Information:
- J. Catal.; (United States), Vol. 65:2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBON MONOXIDE
METHANATION
COBALT BORIDES
CATALYTIC EFFECTS
CHEMICAL PREPARATION
CATALYSTS
NICKEL BORIDES
RHODIUM
RUTHENIUM
EXPERIMENTAL DATA
GRAPHS
TABLES
TEMPERATURE EFFECTS
BORIDES
BORON COMPOUNDS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COBALT COMPOUNDS
DATA
ELEMENTS
INFORMATION
METALS
NICKEL COMPOUNDS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
REFRACTORY METALS
SYNTHESIS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
090121* - Hydrocarbon Fuels- Chemical Synthesis- (1976-1989)