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Role of chemisorption in Fischer-Tropsch synthesis

Journal Article · · Ind. Eng. Chem., Prod. Res. Dev.; (United States)
DOI:https://doi.org/10.1021/i360072a009· OSTI ID:6454955
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An analysis of published experimental data showed that the dissociative adsorption of carbon monoxide plays a key role in Fischer-Tropsch synthesis. Metals that do not dissociate CO at moderate temperatures, such as Pd, are almost inactive, as are those, such as Ti and Zr, which form oxides and carbides that are too stable. The best catalysts are Fe, Co, Ni, and Ru, on which surface-carbon species (C/sub 8/) are formed in large amounts. Studies with a series of Ni-Cu alloys suggested that these species act as intermediates, and after partial hydrogenation to CH or CH/sub 2/, contribute to chain initiation and propagation. Surface carbon also improves Fischer-Tropsch selectivities, especially for higher hydrocarbons. Catalyst poisoning by carbon deposition should thus be minimized by using promotor and optimum operating conditions, rather than by suppressing carbon formation or removing surface carbon.

Research Organization:
Rijksuniv., Leiden
OSTI ID:
6454955
Journal Information:
Ind. Eng. Chem., Prod. Res. Dev.; (United States), Journal Name: Ind. Eng. Chem., Prod. Res. Dev.; (United States) Vol. 18:4; ISSN IEPRA
Country of Publication:
United States
Language:
English

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Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ADSORPTION
ALLOYS
CARBIDES
CARBON
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
COBALT
CONTROL
COPPER ALLOYS
DATA ANALYSIS
DEPOSITION
DISSOCIATION
ELEMENTS
FISCHER-TROPSCH SYNTHESIS
HYDROGENATION
IRON
METALS
NICKEL
NICKEL ALLOYS
NONMETALS
OPTIMAL CONTROL
OXIDES
OXYGEN COMPOUNDS
PALLADIUM
PLATINUM METALS
POISONING
PROMOTERS
REACTION INTERMEDIATES
RUTHENIUM
SEPARATION PROCESSES
SORPTION
SORPTIVE PROPERTIES
SPECIFICITY
STABILITY
SURFACE PROPERTIES
SURFACES
TECHNOLOGY ASSESSMENT
TECHNOLOGY UTILIZATION
TITANIUM
TRANSITION ELEMENTS
ZIRCONIUM