The hydrocarbon selectivity of cobalt Fischer-Tropsch catalysts

Technical Report · Mon Jul 01 04:00:00 EDT 1991

OSTI ID:5175068

Yates, I C; Satterfield, C N

A cobalt Fischer-Tropsch catalyst was studied in a continuous-flow, well-stirred slurry reactor at 220 to 240{degrees}C, 0.5 to 1.5 MPa, H{sub 2}/CO feed ratios between 1.5 and 3.5, H{sub 2} conversions between 6 and 68%, and CO conversions between 11 and 73%. Increasing space velocity (decreasing conversion) or decreasing reactor H{sub 2}/CO ratio decreased the yield of (undesired) C{sub 1} products and increased the yield of (desired) C{sub 10}+ products. Reactor temperature and pressure had little effect on the carbon number distribution. These findings are interpreted in terms of the extent of the readsorption of 1-alkenes into growing chains on the catalyst surface. The relative selectivity to 1-alkenes by the primary synthesis and secondary reaction of l-alkenes to n-alkanes and 2-alkenes depends on reactor H{sub 2}/CO ratio and CO concentration. 25 refs., 15 figs.

• Research Organization: Massachusetts Inst. of Tech., Cambridge, MA (United States). Dept. of Chemical Engineering
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC22-87PC79816
• OSTI ID: 5175068
• Report Number(s): DOE/PC/79816-T1; ON: DE91018065
• Country of Publication: United States
• Language: English

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ALCOHOLS
ALKANES
ALKENES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMICAL REACTORS
COBALT
ELEMENTS
FISCHER-TROPSCH SYNTHESIS
FLUIDS
GASES
HYDROCARBONS
HYDROGEN
HYDROXY COMPOUNDS
METALS
METHANOL
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PRESSURE EFFECTS
QUANTITY RATIO
SYNTHESIS GAS
TEMPERATURE EFFECTS
TRANSITION ELEMENTS
YIELDS