Active sites of solid acidic catalysts--2. Water-gas conversion on alumina and some other catalysts

Journal Article · Tue Oct 31 23:00:00 EST 1978 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(78)90207-5· OSTI ID:6928484

Amenomiya, Y

The reaction rate of carbon dioxide and hydrogen at 400/sup 0/-600/sup 0/C on Alon ..gamma..-alumina in a closed circulation system was proportional to the square root of the partial pressure of each reactant and had an activation energy of 16.1 kcal/mole. Pre-adsorption of either reactant did not affect the rate, but the presence of water inhibited the reaction. The reverse reaction, of carbon monoxide with water, was first order in carbon monoxide, much less than first order in water, and had an activation energy of 22.9 kcal/mole. In comparative tests, a commercial iron oxide/chromia catalyst was most active, followed by two chromia-aluminas; various aluminas were more active than silica-alumina, silica, silica-magnesia, or alumina-boria. Preliminary IR spectroscopic studies revealed formate ion formation during both reactions. The reactions probably proceed on dual sites, possibly on aluminum associated with either oxide ions or hydroxyl groups.

• Research Organization: Natl. Res. Counc. Canada
• OSTI ID: 6928484
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 55:2; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ACTIVATION ENERGY
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
COMPARATIVE EVALUATIONS
DATA
ENERGY
EXPERIMENTAL DATA
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASES
HIGH TEMPERATURE
INFORMATION
INFRARED SPECTRA
INTERMEDIATE BTU GAS
IRON COMPOUNDS
IRON OXIDES
KINETICS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PARTIAL PRESSURE
REACTION KINETICS
SPECTRA
TRANSITION ELEMENT COMPOUNDS
WATER GAS