Disproportionation of carbon monoxide on supported nickel catalysts
Journal Article
·
· J. Catal.; (United States)
OSTI ID:6038283
The disproportionation of carbon monoxide was investigated mainly on a 5.5% Ni/Al/sub 2/O/sub 3/ catalyst by infrared spectroscopy and temperature-programmed desorption. The reaction was found to be of first order with respect to the surface concentration of CO below 200/sup 0/C, while at 450/sup 0/C the reaction proceeded as a second order reaction for the pressure of CO. Results obtained with predeposited carbon indicated that the disproportionation reaction requires an ensemble of several nickel atoms. In agreement with this result, the disproportionation did not take place readily on a 1.1% Ni/Al/sub 2/O/sub 3/ catalyst on which a high dispersion of the metal was indicated by both infrared spectroscopy and the chemisorption of hydrogen. In the temperature-programmed desorption (TPD) carbon monoxide desorbed in a single peak before 300/sup 0/C. Some of the carbon monoxide, however, underwent disproportionation during TPD and a carbon dioxide peak appeared at about 220/sup 0/C. Furthermore, carbon thus deposited on the surface was oxidized to carbon monoxide by oxygen supplied from the catalysts and gave a second peak of CO in TPD at temperatures higher than 300/sup 0/C. Possible sources of the oxygen were discussed.
- Research Organization:
- National Research Council of Canada, Ottawa
- OSTI ID:
- 6038283
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 68:1; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
ABSORPTION SPECTROSCOPY
ADSORPTION
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISORPTION
DATA
DESORPTION
ELEMENTS
EQUILIBRIUM
EXPERIMENTAL DATA
HIGH TEMPERATURE
HYDROGEN
INFORMATION
INFRARED SPECTRA
KINETICS
METALS
METHANATION
NICKEL
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
SEPARATION PROCESSES
SORPTION
SPECTRA
SPECTROSCOPY
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS
10 SYNTHETIC FUELS
ABSORPTION SPECTROSCOPY
ADSORPTION
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISORPTION
DATA
DESORPTION
ELEMENTS
EQUILIBRIUM
EXPERIMENTAL DATA
HIGH TEMPERATURE
HYDROGEN
INFORMATION
INFRARED SPECTRA
KINETICS
METALS
METHANATION
NICKEL
NONMETALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
REACTION KINETICS
SEPARATION PROCESSES
SORPTION
SPECTRA
SPECTROSCOPY
TEMPERATURE DEPENDENCE
TRANSITION ELEMENTS