Carbon dioxide sequestration through formation of group-2 carbonates and silicon dioxide
First Claim
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1. A method of sequestering carbon dioxide produced by a source, comprising:
- (a) obtaining a hydroxide salt in an aqueous mixture;
(b) admixing the hydroxide salt with carbon dioxide produced by the source under conditions suitable to form a first carbonate salt in a first admixture;
(c) chlorinating a group-2 silicate mineral with hydrochloric acid under conditions suitable to form a corresponding group-2 chloride salt, water, and silicon dioxide;
(d) admixing the group-2 chloride salt with the first carbonate salt under conditions suitable to form a group-2 carbonate salt in a second admixture; and
(e) separating said group-2 carbonate salt from the admixture,wherein the reaction of step (d) occurs in an electrochemical cell which generates a first source of electrical energy, and whereby the carbon dioxide is sequestered into a mineral product form.
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Abstract
The present invention relates to carbon dioxide sequestration, including processes in which group-2 silicates are used to remove carbon dioxide from waste streams to form corresponding group-2 carbonates and silica.
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Citations
27 Claims
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1. A method of sequestering carbon dioxide produced by a source, comprising:
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(a) obtaining a hydroxide salt in an aqueous mixture; (b) admixing the hydroxide salt with carbon dioxide produced by the source under conditions suitable to form a first carbonate salt in a first admixture; (c) chlorinating a group-2 silicate mineral with hydrochloric acid under conditions suitable to form a corresponding group-2 chloride salt, water, and silicon dioxide; (d) admixing the group-2 chloride salt with the first carbonate salt under conditions suitable to form a group-2 carbonate salt in a second admixture; and (e) separating said group-2 carbonate salt from the admixture, wherein the reaction of step (d) occurs in an electrochemical cell which generates a first source of electrical energy, and whereby the carbon dioxide is sequestered into a mineral product form. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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