Hybrid fischer-tropsch catalysts and processes for use
AssigneeChevron U.S.A. Inc.
InventorsKandaswamy Jothimurugesan, Robert James Saxton
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Abstract
Disclosed are hybrid Fischer-Tropsch catalysts containing cobalt and ZSM-48 zeolite. The hybrid Fischer-Tropsch catalysts can contain cobalt deposited on ZSM-48 extrudate supports. Alternatively, the Fischer-Tropsch catalysts can contain cobalt deposited on supports mixed with ZSM-48 particles. It has surprisingly been found that the use of hybrid Fischer-Tropsch catalysts containing ZSM-48 zeolite in synthesis gas conversion reactions results in improved C5+ productivity and catalyst activity, as well as a desirable product distribution including low formation of methane and C21+.
Claims13
A method of performing a Fischer-Tropsch synthesis gas conversion reaction, the method comprising:
- a. contacting a hybrid Fischer-Tropsch catalyst comprising a Fischer-Tropsch metal component selected from cobalt, iron and ruthenium and a ZSM-48 zeolite component with synthesis gas comprising hydrogen and carbon monoxide at a ratio of hydrogen to carbon monoxide of from 1 to 3 at a temperature of from 180 to 280° C. and a pressure of from 5 to 30 atmospheres to yield a hydrocarbon product containing less than 8 weight % C21+ and at least 60 weight % C5+ at a C5+ productivity of at least 0.25 mLC5+/gcat/h.
A method of performing a Fischer-Tropsch synthesis gas conversion reaction, the method comprising:
- a. contacting a hybrid Fischer-Tropsch catalyst comprising a Fischer-Tropsch metal component selected from cobalt, iron and ruthenium and a ZSM-48 zeolite component with synthesis gas comprising hydrogen and carbon monoxide at a ratio of hydrogen to carbon monoxide of from 1 to 3 at a temperature of from 180 to 280° C. and a pressure of from 5 to 30 atmospheres to yield a hydrocarbon product containing less than 8 weight % C21+ and at least 60 weight % C5+ at a C5+ productivity of at least 50% greater than an equivalent hybrid Fischer-Tropsch catalyst containing ZSM-5 zeolite rather than ZSM-48.
A method of performing a Fischer-Tropsch synthesis gas conversion reaction, the method comprising:
- a. contacting a hybrid Fischer-Tropsch catalyst comprising a Fischer-Tropsch metal component selected from cobalt, iron and ruthenium and a ZSM-48 zeolite component with synthesis gas comprising hydrogen and carbon monoxide at a ratio of hydrogen to carbon monoxide of from 1 to 3 at a temperature of from 180 to 280° C. and a pressure of from 5 to 30 atmospheres to yield a hydrocarbon product containing less than 8 weight % C21+ and at least 60 weight % C5+ at a C5+ productivity of at least 40% greater than an equivalent hybrid Fischer-Tropsch catalyst containing ZSM-12 zeolite rather than ZSM-48.
Dependencies are inferred from the claim text.