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US 10,751,711 B2Granted
Fischer-tropsch catalyst performance enhancement process
AssigneeBp P.L.C.
InventorsEwen James Ferguson, Manuel Ojeda Pineda, Alexander James Paterson
Life of this patent
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Abstract
The present invention relates to a process for treating a catalyst to improve performance, and more specifically to a process for treating a Fischer-Tropsch catalyst using a high hydrogen syngas to improve catalyst performance.
Claims21
A process for improving performance of a Fischer-Tropsch catalyst comprising the steps of:
- (a) contacting the catalyst with hydrogen or syngas at a temperature in the range of from about 200° C. to about 450° C., under a pressure in the range of from about 0 barg to about 50 barg, and a GHSV in the range of from about 500 hr−1 to about 5000 hr−1, for a period of time of at least 1 hour to provide a reduced catalyst;
- (b) contacting the reduced catalyst of step (a) with syngas comprising H2:CO in a ratio in the range of from about 1:1 to about 2.1:1, in a Fischer-Tropsch synthesis reactor under a pressure in the range of from about 0 barg to about 50 barg and a GHSV of over 1000 hr−1, at a temperature in the range of from about 100° C. to about 280° C.;
- (c) subjecting the catalyst of step (b) to a high hydrogen level treatment by increasing the ratio of H2:CO of the syngas to a ratio of at least 3:1 at a pressure in the range of from about 30 barg to about 42 barg, for a period of time of at least 1 hour at a temperature in the range of from about 160° C. to about 250° C., and a GHSV in the range of from about 1000 hr−1 to about 8000 hr−1;
- and
- (d) decreasing the ratio of H2:CO of the syngas to a ratio in the range of from about 1:1 to about 2.1:1, at a GHSV of from about 1250 hr−1, under a pressure in the range of from about 30 barg to about 42 barg, and at a temperature in the range of from about 160° C. to about 280° C.
2 more elements
A process for improving performance of a Fischer-Tropsch catalyst comprising the steps of:
- (a) contacting the catalyst with hydrogen or syngas at a temperature in the range of from about 200° C. to about 450° C., under a pressure in the range of from about 0 barg to about 50 barg, and a GHSV in the range of from about 500 hr−1 to about 5000 hr−1, for a period of time of at least 1 hour to provide a reduced catalyst;
- (b) contacting the reduced catalyst of step (a) with syngas comprising H2:CO in a ratio in the range of from about 1:1 to about 2.1:1, in a Fischer-Tropsch synthesis reactor under a pressure in the range of from about 0 barg to about 50 barg and a GHSV of over 1000 hr−1, at a temperature in the range of from about 100° C. to about 280° C.;
- (c) subjecting the catalyst of step (b) to a high hydrogen level treatment by replacing the syngas with either pure hydrogen or a hydrogen/nitrogen mixture, at a pressure in the range of from about 30 barg to about 42 barg for a period of time of at least 1 hour at a temperature in the range of from about 160° C. to about 250° C. and a GHSV in the range of from about 1000 hr−1 to about 8000 hr−1;
- and
- (d) decreasing the hydrogen level and restoring a ratio of H2:CO of the syngas to a ratio in the range of from about 1:1 to about 2.1:1, at a GHSV of from about 1250 hr−1, under a pressure in the range of from about 30 barg to about 42 barg, and at a temperature in the range of from about 160° C. to about 280° C.
2 more elements
A process for improving performance of a Fischer-Tropsch catalyst comprising the steps of:
- (a) contacting the catalyst with hydrogen or syngas at a temperature in the range of from about 200° C. to about 450° C., under a pressure in the range of from about 0 barg to about 50 barg, and a GHSV in the range of from about 500 hr−1 to about 5000 hr−1, for a period of time of at least 1 hour to provide a reduced catalyst;
- (b) contacting the reduced catalyst of step (a) with syngas comprising H2:CO in a ratio of from about 1:1 to about 2:1, under a pressure in the range of from about 0 barg to about 50 barg and a GHSV of over 1000 hr−1, at a temperature in the range of from about 100° C. to about 280° C.;
- (c) eliminating the CO from the syngas of step (b) for a period of time of at least 1 hour;
- and
- (d) reintroducing the CO to provide syngas with a ratio of H2:CO in the range of from about 1:1 to about 2.1:1, at a GHSV of about 1250 hr−1, under a pressure in the range of from about 30 barg to about 42 barg, and at a temperature in the range of from about 160° C. to about 280° C.
2 more elements
Dependencies are inferred from the claim text.