Carbon Dioxide Capture
First Claim
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1. A method, comprising:
- (a) separating anhydrous sodium carbonate from a first aqueous solution formed by reacting carbon dioxide and sodium hydroxide; and
(b) causticizing the separated anhydrous sodium carbonate to generate carbon dioxide and sodium hydroxide.
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Abstract
A method of carbon dioxide capture is disclosed. In a step (a) anhydrous sodium carbonate is separated from a first aqueous solution formed by reacting carbon dioxide and an aqueous solution of sodium hydroxide. In step (b) the anhydrous sodium carbonate is treated by causticization to generate carbon dioxide and sodium hydroxide. The first aqueous solution of step (a) is formed by scrubbing a gas containing carbon dioxide with an aqueous solution of sodium hydroxide.
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Citations
18 Claims
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1. A method, comprising:
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(a) separating anhydrous sodium carbonate from a first aqueous solution formed by reacting carbon dioxide and sodium hydroxide; and (b) causticizing the separated anhydrous sodium carbonate to generate carbon dioxide and sodium hydroxide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method comprising:
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(a) scrubbing a gas containing carbon dioxide with an aqueous solution of sodium hydroxide to react the carbon dioxide to form a first aqueous solution containing sodium carbonate; (b) separating anhydrous sodium carbonate from the first aqueous solution; and (c) treating the anhydrous sodium carbonate by causticization to generate carbon dioxide and sodium hydroxide. - View Dependent Claims (16)
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17. A method comprising:
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(a) scrubbing a gas containing carbon dioxide with an aqueous solution of alkali metal hydroxide resulting in a first aqueous solution containing alkali metal carbonate; (b) separating anhydrous alkali metal carbonate from the first aqueous solution; and (c) treating the anhydrous alkali metal carbonate by causticization to generate carbon dioxide and alkali metal hydroxide.
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18. A method of generating carbon credits comprising:
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(a) scrubbing a gas containing carbon dioxide with an aqueous solution of sodium hydroxide to react the carbon dioxide to form a first aqueous solution containing sodium carbonate; (b) separating anhydrous sodium carbonate from the first aqueous solution; (c) treating the anhydrous sodium carbonate by causticization to generate carbon dioxide and sodium hydroxide thereby generating carbon credits based on the carbon dioxide removed from the gas.
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Specification