New evidence for the mechanism of the Fischer-Tropsch synthesis of hydrocarbons

Journal Article · Mon Dec 01 04:00:00 EST 1980 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(80)90043-3· OSTI ID:6651677

Nijs, H H; Jacobs, P A

New mechanistic evidence is advanced for Fischer-Tropsch synthesis on Ru-loaded Y-type zeolites, Ru-on-silica and Co promoted on keiselguhr. The experiments were carried out in real Fischer-Tropsch conditions, i.e., at high growth rates. Experiments were done in pulse reactors and under transient reaction conditions. /sup 13/C-labeled carbon monoxide was used and addition of water and olefins to the synthesis gas was studied. From a series of well-chosen experiments it is deduced that carbon monoxide disproportionation initiates the reaction. Surface carbon is hydrogenated to methane and the reverse water-gas shift reaction accounts for water formation. Water reacts with surface carbon and forms hydroxy-species which initiate chain propagation. The mechanism accounts for a particle size effect and explains why polar conditions stimulate chain growth. 5 figures, 3 tables.

• Research Organization: Katholieke Universiteit Leuven, Belgium
• OSTI ID: 6651677
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 66:2; 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
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKENES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COBALT
DIATOMACEOUS EARTH
ELEMENTS
FISCHER-TROPSCH SYNTHESIS
FLUIDS
GASES
HYDROCARBONS
HYDROGEN COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
KINETICS
MATERIALS
METALS
METHANATION
MINERALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
PULSED REACTORS
REACTION KINETICS
REACTORS
REFRACTORY METALS
RUTHENIUM
SYNTHESIS GAS
TRANSITION ELEMENTS
WATER
ZEOLITES