The hydrocarbon selectivity of cobalt Fischer-Tropsch catalysts

Technical Report · Mon Jul 01 00:00:00 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: USDOE; 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

Related Subjects

01 COAL, LIGNITE, AND PEAT
10 SYNTHETIC FUELS
CARBON MONOXIDE
QUANTITY RATIO
COBALT
CATALYTIC EFFECTS
HYDROGEN
ALKANES
ALKENES
CATALYSTS
CHEMICAL REACTORS
FISCHER-TROPSCH SYNTHESIS
METHANOL
PRESSURE EFFECTS
SYNTHESIS GAS
TEMPERATURE EFFECTS
YIELDS
ALCOHOLS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
FLUIDS
GASES
HYDROCARBONS
HYDROXY COMPOUNDS
METALS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
TRANSITION ELEMENTS
010408* - Coal
Lignite
& Peat- C1 Processes- (1987-)
100200 - Synthetic Fuels- Production- (1990-)