Effect of. gamma. -irradiation on methanation of carbon dioxide over supported Ru catalysts
Journal Article
·
· J. Catal.; (United States)
In situ ..gamma..-irradiation has been found to enhance the activity of Ru/molecular sieve and Ru/alumina catalysts for the CO/sub 2/ methanation reaction in the temperature range 400 to 600 K. The extent of radiation enhancement in catalytic activity was inversely related to temperature. The activation energy for the formation of CH/sub 4/ from 2% CO/sub 2/ in H/sub 2/ was reduced in the presence of radiation from 13.8 to 7.7 kcal mole/sup -1/ for Ru/alumina and from 7.3 to 4.2 kcal mole/sup -1/ for Ru/molecular sieve. The results indicate that ..gamma..-irradiation gives rise to energy storage in support materials. It is suggested that the energy released on thermal stimulation weakens the metal-CO/sub 2/ bonds resulting in an accelerated rate of reduction of CO/sub 2/ to active carbon and its subsequent methanation.
- Research Organization:
- Bhabha Atomic Research Center, Bombay, India
- OSTI ID:
- 6775379
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 66:1; 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
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ADSORBENTS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
DATA
ELECTROMAGNETIC RADIATION
ELEMENTS
EXPERIMENTAL DATA
GAMMA RADIATION
INFORMATION
IONIZING RADIATIONS
METALS
METHANATION
MOLECULAR SIEVES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
REFRACTORY METALS
RUTHENIUM
TRANSITION ELEMENTS
10 SYNTHETIC FUELS
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ADSORBENTS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CATALYST SUPPORTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
DATA
ELECTROMAGNETIC RADIATION
ELEMENTS
EXPERIMENTAL DATA
GAMMA RADIATION
INFORMATION
IONIZING RADIATIONS
METALS
METHANATION
MOLECULAR SIEVES
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
REFRACTORY METALS
RUTHENIUM
TRANSITION ELEMENTS