Scrubbing CO2 from a CO2-containing gas with an aqueous stream
AssigneeChevron U.S.A. Inc.
InventorsDennis J. O'Rear, Curtis Munson
Life of this patent
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Abstract
A process for removing CO2 from a CO2-containing gas. The process includes scrubbing CO2 from a CO2-containing gas using an aqueous phase liquid forming a CO2-enriched aqueous phase. The CO2-enriched aqueous phase is then disposed of in at least one of a marine environment, a terrestrial formation or combination thereof.
Claims20
A process for removing CO2 from a CO2-containing gas, the process comprising:
- a) scrubbing CO2 from a CO2-containing gas using an aqueous phase liquid, forming a CO2-enriched aqueous phase, wherein the aqueous phase liquid is at a pressure greater than about atmospheric pressure and wherein the aqueous phase liquid has a pH of at least about 7.0 before scrubbing;
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- b) disposing of the CO2-enriched aqueous phase in at least one of a marine environment, a terrestrial formation or combination thereof, wherein disposal of the CO2-enriched aqueous phase is done at a temperature, pressure, and pH sufficient to ensure that about 75% or more of the CO2 removed from the CO2-containing gas remains dissolved in the aqueous phase.
A process for converting methane-containing gas in a Fischer-Tropsch GTL process into liquid hydrocarbons, the process comprising:
- a) converting methane-containing gas into synthesis gas;
- b) converting at least a portion of the synthesis gas into liquid hydrocarbons and CO2-containing gas;
- c) scrubbing CO2 from the CO2-containing gas using an aqueous phase liquid, forming a CO2-enriched aqueous phase wherein during scrubbing the aqueous phase liquid is at a pressure greater than about atmospheric pressure and wherein the aqueous phase liquid has a pH of at least 7.0 before scrubbing;
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- d) disposing of the CO2-enriched aqueous phase in at least one of a marine environment, a terrestrial formation or combination thereof wherein disposal of the CO2-enriched aqueous phase is done at a temperature, pressure and pH sufficient to ensure that about 75% or more of the CO2 removed from the CO2-containing gas remains dissolved in the aqueous phase.
A process for removing CO2 from a CO2-containing gas, the process comprising:
- a) scrubbing CO2 from a CO2-containing gas, present in a Fischer-Tropsch GTL process stream and/or a furnace exhaust gas, using an aqueous phase liquid at a pressure greater than about atmospheric pressure wherein the aqueous phase liquid has a pH of at least about 7.0 before scrubbing;
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- b) disposing of the CO2-enriched aqueous phase in at least one marine environment, a terrestrial formation, or combination thereof at a temperature, pressure and pH sufficient to ensure that at least about 75% of the CO2 removed from the CO2-containing gas remains in the aqueous phase.
A process for converting methane-containing gas generated form a Fischer-Tropsch GTL process into liquid hydrocarbons, the process comprising:
- a) converting methane-containing gas into synthesis gas;
- b) converting at least a portion of the methane-containing gas into liquid hydrocarbons and by-product CO2-containing gas by a Fischer-Tropsch process;
- c) scrubbing CO2 from the CO2-containing gas using an aqueous phase liquid at a pressure greater about atmospheric pressure, forming a CO2-enriched aqueous phase wherein the aqueous phase liquid comprises water selected from the group consisting of reaction water generated during the FischerTropsch process, spent cooling water from the Fischer-Tropsch process, and mixtures thereof;
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- d) disposing of the CO2-enriched aqueous phase in at least one of a marine environment, a terrestrial formation or combination thereof at a temperature, pressure and pH sufficient to ensure that at least about 75% of the CO2 removed from the CO2-containing gas remains dissolved in the aqueous phase.
Dependencies are inferred from the claim text.