Fischer-Tropsch synthesis over a ruthenium catalyst infrared and kinetic studies

Thesis/Dissertation · Mon Jan 01 04:00:00 EST 1979

OSTI ID:6408940

Ekerdt, J G

Infrared and kinetic studies of the synthesis of hydrocarbons from carbon monoxide and hydrogen on a silica-supported ruthenium catalyst showed that the formation of ethane, propylene, and propane, the principal products obtained in addition to methane, was favored at high carbon monoxide partial pressures, low hydrogen/carbon monoxide ratios, and low temperatures. The IR spectra showed a band at 2030/cm associated with chemisorbed carbon monoxide and bands at 2950, 2910, and 2845/cm assigned to hydrocarbon structures surrounded by chemisorbed carbon monoxide. The data suggested that the first reaction stage involves the dissociation of carbon monoxide to produce surface carbon atoms. Addition of ethylene to the synthesis gas feed gave enhanced propylene yields, and the use of cyclohexene as a scavenger resulted in a series of alkylcyclohexene and alkylcyclohexane products. This suggests the presence of alkylidene groups on the catalyst surface. Initial methane formation rates were 1.5 order in hydrogen and -0.6 order in carbon monoxide, with an activation energy of 24 kcal/mole and a 740,000 preexponential factor.

• OSTI ID: 6408940
• Country of Publication: United States
• Language: English

Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
ACTIVATION ENERGY
ALKANES
ALKENES
CATALYSTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
DATA
ELEMENTS
ENERGY
ETHANE
EXPERIMENTAL DATA
FISCHER-TROPSCH SYNTHESIS
HYDROCARBONS
INFORMATION
INFRARED SPECTRA
KINETICS
METALS
METHANE
NUMERICAL DATA
OPTIMIZATION
ORGANIC COMPOUNDS
PLATINUM METALS
PROPANE
PROPYLENE
REACTION KINETICS
RUTHENIUM
SPECTRA
SYNTHESIS
TRANSITION ELEMENTS
YIELDS