Promotion of nickel-catalyzed hydrogasification of carbon by alkaline earth compounds
A pitch coke was impregnated with nickel nitrate and some additives and gasified in an atmospheric hydrogen flow, to investigate the possibility of promoting nickel-catalyzed hydrogasification by the addition of foreign components. Alkaline earths and aluminum nitrate, which were not direct catalysts for the hydrogasification of carbon, enhanced methane formation markedly, while nitrates of potassium, chronmium, and iron and also potassium carbonate had almost no effect. Additives which are effective are believed to be in the form of an oxide. In the presence of nickel, methane is formed at two separate regions: 400 to 700/sup 0/C and above 750/sup 0/C. All the promoters increased conversion in the lower temperature reaction while only calcium salt enhanced it in the higher temperature reaction. Promoters, especially magnesium, extensively suppressed the sintering of nickel. The enhancement of methane formation at lower temperatures is ascribeed to the increased dispersion of nickel. Possible reasons for the promotions are discussed. 8 figures, 1 table.
- Research Organization:
- Tohoku Univ., Katahira, Japan
- OSTI ID:
- 5874970
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 81:1; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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ADDITIVES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
ALKANES
ALUMINIUM COMPOUNDS
ALUMINIUM NITRATES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBON COMPOUNDS
CARBONATES
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHROMATOGRAPHY
CHROMIUM COMPOUNDS
CHROMIUM NITRATES
COKE
COMPARATIVE EVALUATIONS
DATA
EXPERIMENTAL DATA
GAS CHROMATOGRAPHY
GASIFICATION
HEATING RATE
HIGH TEMPERATURE
HYDROCARBONS
HYDROGENATION
IMPREGNATION
INFORMATION
IRON COMPOUNDS
IRON NITRATES
ISOTHERMAL PROCESSES
KINETICS
MAGNESIUM COMPOUNDS
MAGNESIUM OXIDES
MEDIUM TEMPERATURE
METHANE
NICKEL COMPOUNDS
NICKEL NITRATES
NITRATES
NITROGEN COMPOUNDS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POTASSIUM CARBONATES
POTASSIUM COMPOUNDS
POTASSIUM NITRATES
REACTION KINETICS
SAMPLE PREPARATION
SEPARATION PROCESSES
SYNTHESIS
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
VERY HIGH TEMPERATURE