Underwater scrubbing of CO2 from CO2-containing hydrocarbon resources
First Claim
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1. A method for removing CO2 from a CO2-containing hydrocarbon asset, the method comprising:
- a) contacting a CO2-containing hydrocarbon asset with an aqueous liquid stream at an underwater location so that at least a portion of the CO2 in the hydrocarbon asset is dissolved into the aqueous liquid stream, creating a CO2-depleted hydrocarbon asset and a CO2-enriched aqueous stream, wherein during contact with the aqueous liquid stream, temperature, pressure, pH, and contacting duration are sufficient to ensure that at least about 90% by weight of the hydrocarbon asset is in a gas phase;
b) separating the CO2-enriched aqueous stream from the hydrocarbon asset; and
c) disposing of the CO2-enriched aqueous stream in at least one of a marine environment, a terrestrial formation or combination thereof.
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Abstract
A method for removing CO2 from a CO2-containing hydrocarbon asset. The process includes contacting a CO2-containing hydrocarbon asset with an aqueous liquid stream at an underwater location so that at least a portion of the CO2 in the hydrocarbon asset is dissolved into the aqueous liquid stream, creating a CO2-depleted hydrocarbon asset and a CO2-enriched aqueous stream. The CO2-enriched aqueous stream is separated from the hydrocarbon asset. Finally, the CO2-enriched aqueous stream is disposed of in at least one of a marine environment, a terrestrial formation, or combination thereof.
40 Citations
19 Claims
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1. A method for removing CO2 from a CO2-containing hydrocarbon asset, the method comprising:
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a) contacting a CO2-containing hydrocarbon asset with an aqueous liquid stream at an underwater location so that at least a portion of the CO2 in the hydrocarbon asset is dissolved into the aqueous liquid stream, creating a CO2-depleted hydrocarbon asset and a CO2-enriched aqueous stream, wherein during contact with the aqueous liquid stream, temperature, pressure, pH, and contacting duration are sufficient to ensure that at least about 90% by weight of the hydrocarbon asset is in a gas phase;
b) separating the CO2-enriched aqueous stream from the hydrocarbon asset; and
c) disposing of the CO2-enriched aqueous stream in at least one of a marine environment, a terrestrial formation or combination thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A process for producing a CO2-depleted hydrocarbon gas from a hydrocarbon/CO2 gas mixture, the method comprising:
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a) contacting a hydrocarbon/CO2 gas mixture underwater with an aqueous liquid stream so that at least a portion of the CO2 in the gas mixture is dissolved in the aqueous liquid stream, creating a CO2-depleted hydrocarbon gas and a CO2-enriched aqueous stream, wherein during contact with the aqueous liquid stream, temperature, pressure, pH, and contacting duration are sufficient to ensure that at least about 90% by weight of the hydrocarbon/CO2 gas mixture is in a gas phase;
b) separating the CO2-enriched aqueous stream from the hydrocarbon gas; and
c) producing a CO2-depleted hydrocarbon gas. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A method for removing CO2 from a CO2-containing hydrocarbon asset, the method comprising:
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a) at an underwater location, contacting a CO2-containing hydrocarbon asset with an aqueous liquid stream, comprised of sea water and at a pressure greater than about atmospheric pressure, so that at least a portion of the CO2 in the hydrocarbon asset is dissolved into the aqueous liquid stream, creating a CO2-depleted hydrocarbon asset and a CO2-enriched aqueous stream, wherein during contact with the aqueous liquid stream, temperature, pressure, pH, and contacting duration are sufficient to ensure that at least about 90% by weight of the hydrocarbon asset is in a gas phase;
b) separating the CO2-enriched aqueous stream from the hydrocarbon asset; and
c) disposing of the CO2-enriched aqueous stream in at least one of a marine environment, a terrestrial formation or combination thereof.
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19. A process for producing a CO2-depleted hydrocarbon gas from a hydrocarbon/CO2 gas mixture, the method comprising:
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a) contacting a hydrocarbon/CO2 gas mixture underwater with an aqueous liquid stream, comprising sea water and at a pressure greater than about atmospheric pressure so that at least a portion of the CO2 in the gas mixture is dissolved in the aqueous liquid stream, creating a CO2-depleted hydrocarbon gas and a CO2-enriched aqueous stream, wherein during contact with the aqueous liquid stream, temperature, pressure, pH, and contacting duration are sufficient to ensure that at least about 90% by weight of the hydrocarbon/CO2 gas mixture is in a gas phase;
b) separating the CO2-enriched aqueous stream from the hydrocarbon gas; and
c) producing a CO2-depleted hydrocarbon gas.
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Specification