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US 2009/0156696 A1Published application
Process for the capture of co2 from ch4 feedstock and gtl process streams
AssigneeChevron U.S.A. Inc.
InventorDennis J. O'Rear
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Abstract
An integrated process is described in which at least a portion of CO2 is captured from both the feedstock and a process stream in a GTL facility. This integrated process provides for lower costs in CO2 capture than can be done by separate processes. At least a portion of the captured CO2 can then be prevented from being emitted into the environment by sequestration or reaction of the CO2 to other than a CO2 product.
Claims10
A process to convert a gas stream containing both CO2 and methane into hydrocarbonaceous liquids in a GTL facility with CO2 capture comprising:
- a. obtaining a gas stream containing both CO2 and methane;
- b. absorbing at least a portion of the CO2 from the methane by use of an amine absorbent;
- c. discharging at least a portion of the CO2 from the amine absorbent to obtain a first CO2 enriched stream;
- d. converting at least a portion of the methane into a first synthesis gas and CO2;
- e. reacting the first synthesis gas over a synthesis gas conversion process to form a hydrocarbonaceous liquid and a second synthesis gas;
- f. absorbing at least a portion of the CO2 from a synthesis gas stream of pressure P by use of a second absorbent wherein the synthesis gas stream is selected from the group consisting of the first synthesis gas stream, the second synthesis gas stream, and combinations;
- g. discharging at least a portion of the CO2 from the second absorbent to obtain a second CO2 enriched stream;
- h. combining at least a portion of the first and second CO2 enriched streams;
- and
- i. sequestering at least a portion of the combined streams.
7 more elements
Dependencies are inferred from the claim text.