Fischer-Tropsch synthesis over iron-based catalysts in slurry reactors. Reaction rates, kinetics and implications for improving hydrocarbon productivity

Conference · Tue Oct 01 04:00:00 EDT 1996

OSTI ID:370716

Raje, A P; Davis, B H ^[1]

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1. Center for Applied Energy Research, Lexington, KY (United States)

The Fischer-Tropsch (FT) synthesis is carried out over a high activity precipitated iron catalyst promoted with silica and potassium in a slurry reactor. Reaction rates (FTS and water gas shift) and partial pressures are evaluated over a wide range of CO conversions (10 to 90%) and space velocities at 270{degrees}C, 175 psig and a H{sub 2}/CO ratio of 0.67. The partial pressure of water exhibits a maximum at intermediate CO conversion. Both the fraction of CO converted to hydrocarbons and the hydrocarbon space time yield decrease with increasing CO conversion. This implies that it would be beneficial to have lower conversion per pass in the reactor with recycle to achieve a high overall conversion. The data as well as experiments with water and CO{sub 2} addition enable us to determine a kinetic expression for the catalyst which shows negligible inhibition of the reaction rate by water or CO{sub 2}.

• OSTI ID: 370716
• Report Number(s): CONF-960376--
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CARBON DIOXIDE
CARBON MONOXIDE
CATALYTIC EFFECTS
CHEMICAL REACTIONS
CONVERSION
FISCHER-TROPSCH SYNTHESIS
HYDROCARBONS
IRON
KINETICS
POTASSIUM
SILICA