Further results on the reaction of H/sub 2//CO on fused iron by the transient method
Journal Article
·
· J. Catal.; (United States)
OSTI ID:6891012
Experiments have been continued on a commercial ammonia synthesis catalyst, promoted, fused-iron catalyst. Catalyst stability and long-term activity are improved by an oxygen treatment at 500/sup 0/C prior to reduction at 500/sup 0/C. Water is a strong inhibitor of the initial reaction of H/sub 2//CO (9/1) at 250/sup 0/C and 1 atm to hydrocarbons, and the steady-state catalyst is active for the shift reaction. Experiments with C/sub 2/H/sub 4//H/sub 2/ and other olefins show that these reactants are both slit into lower alkanes (including methane) and added to for the formation of alkanes of higher carbon number than the feed olefin. Reaction on a reduced catalyst at 250/sup 0/C does not lead to bulk carburization of the iron, whereas of course CO/H/sub 2/ under the same conditions forms bulk Fe/sub 2/C. These results support a mechanism in which the hydrogenation of surface carbon is the rate-limiting process, and chain growth occurs through C/sub x/H/sub y/ fragments, present on the surface in low coverage. Electron spectroscopy studies show that the surface of the catalyst used at 250/sup 0/C has a high concentration of graphitic carbon and that the iron is at least partly oxidized.
- Research Organization:
- Universite Claude Bernard, Lyon, France
- OSTI ID:
- 6891012
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 64:1; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Further results on the reaction of H/sub 2//CO on fused iron by the transient method
Further results on the reaction of H/sub 2//CO on fused iron by the transient method
Transient method applied to the methanation and Fischer--Tropsch reactions over a fused iron catalyst
Conference
·
Sun Dec 31 23:00:00 EST 1978
· Am. Chem. Soc., Div. Fuel Chem., Prepr.; (United States)
·
OSTI ID:5171366
Further results on the reaction of H/sub 2//CO on fused iron by the transient method
Conference
·
Mon Dec 31 23:00:00 EST 1979
· Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States)
·
OSTI ID:6318408
Transient method applied to the methanation and Fischer--Tropsch reactions over a fused iron catalyst
Journal Article
·
Sat Jul 01 00:00:00 EDT 1978
· J. Catal.; (United States)
·
OSTI ID:6823321
Related Subjects
090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
ALKENES
CARBIDES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
ELECTRON SPECTROSCOPY
ELEMENTS
ETHYLENE
EXPERIMENTAL DATA
HYDROCARBONS
HYDROGEN
HYDROGENATION
INFORMATION
IRON CARBIDES
IRON COMPOUNDS
KINETICS
MELTING
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
REACTION KINETICS
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS
10 SYNTHETIC FUELS
ALKENES
CARBIDES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CHALCOGENIDES
CHEMICAL REACTIONS
DATA
ELECTRON SPECTROSCOPY
ELEMENTS
ETHYLENE
EXPERIMENTAL DATA
HYDROCARBONS
HYDROGEN
HYDROGENATION
INFORMATION
IRON CARBIDES
IRON COMPOUNDS
KINETICS
MELTING
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
REACTION KINETICS
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS