Effect of the nature of the alkaline promoter on the properties of iron carbonyl catalysts
The aluminum-iron catalysts based on iron carbonyls promoted by KOH additives are active in the synthesis of hydrocarbons from CO and H/sub 2/ and exhibit high selectivity with respect to lower olefins. They studied the effect of promotion of aluminum-iron catalysts by alkali metals using the IR spectra of adsorbed CO. Decomposition of iron carbonyls in nonpromoted aluminum-iron catalysts and catalysts modified with lithium basically results in the formation of oxidized forms of iron. In promotion of the samples with sodium, potassium, and rubidium, the iron on the surface of the aluminum oxide is stabilized in the metallic state. A decrease in the concentration of hydroxyl groups in the carrier which are capable of oxidizing iron during decomposition of carbonyls is the cause of this. Iron-carbonyl catalysts promoted with sodium, potassium, and rubidium additives are significantly more active in the synthesis of hydrocarbons from carbon monoxide and hydrogen than the nonpromoted catalyst and the sample containing lithium. Metallic iron is the active component of these catalysts.
- Research Organization:
- N.D. Zelinskii Institute of Organic Chemistry, Moscow, USSR
- OSTI ID:
- 6358089
- Journal Information:
- Bull. Acad. Sci. USSR, Div. Chem. Sci. (Engl. Transl.); (United States), Journal Name: Bull. Acad. Sci. USSR, Div. Chem. Sci. (Engl. Transl.); (United States) Vol. 35:7; ISSN BACCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
ACTIVATION ENERGY
ALKALI METAL COMPOUNDS
ALKALI METALS
ALKANES
ALKENES
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CARBONYLS
CATALYSIS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
CYCLOALKANES
DECOMPOSITION
ELEMENTS
ENERGY
ETHANE
ETHYLENE
HETEROGENEOUS CATALYSIS
HYDROCARBONS
HYDROGEN
INFRARED SPECTRA
IRON COMPOUNDS
LITHIUM COMPOUNDS
METALS
METHANE
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POTASSIUM
PROMOTERS
PROPANE
RUBIDIUM
SODIUM
SPECTRA
SYNTHESIS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YIELDS