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US 11,230,473 B2Granted
CO2 mineralization in produced and industrial effluent water by pH-swing carbonation
AssigneeThe Regents of the University of California
InventorsGaurav N. Sant, Hyukmin Kweon, Erika Callagon La Plante, Dante Adam Simonetti
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Abstract
Effluent water is combined with carbon dioxide sourced from a carbon dioxide-containing emission stream to produce a reaction solution. The pH of the reaction solution is controlled to induce precipitation of a carbonate salt from the reaction solution.
Claims11
A method comprising:
- combining effluent water with carbon dioxide sourced from a carbon dioxide-containing emission stream to produce a reaction solution;
- and
- controlling the pH of the reaction solution with a regenerable heterogeneous pH buffer agent to induce precipitation of a carbonate salt from the reaction solution, wherein the regenerable heterogeneous pH buffer agent is a clay to support ion exchange reaction, or a polymer-supported buffer agent.
A method comprising:
- combining effluent water with carbon dioxide sourced from a carbon dioxide-containing emission stream to produce a reaction solution;
- and
- inducing precipitation of a carbonate salt from the reaction solution in the presence of a regenerable heterogeneous pH buffer agent, wherein the regenerable heterogeneous pH buffer agent is a clay to support ion exchange reaction, or a polymer-supported buffer agent.
Dependencies are inferred from the claim text.