Ammonia mediated carbon dioxide (CO2) sequestration methods and systems
AssigneeBlue Planet Systems Corporation
InventorsBrent R. Constantz, Jacob Schneider, Mark Bewernitz
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Abstract
Methods of sequestering carbon dioxide (CO2) are provided. Aspects of the methods include contacting an aqueous capture ammonia with a gaseous source of CO2 under conditions sufficient to produce an aqueous ammonium carbonate. The aqueous ammonium carbonate is then combined with a cation source under conditions sufficient to produce a solid CO2 sequestering carbonate and an aqueous ammonium salt. The aqueous capture ammonia is then regenerated from the from the aqueous ammonium salt. Also provided are systems configured for carrying out the methods.
Claims24
A method of sequestering CO2 from a gaseous source of CO2, the method comprising:
- a) contacting an aqueous capture ammonia with a gaseous source of CO2 under conditions sufficient to produce an aqueous ammonium carbonate;
- b) combining a cation source and the aqueous ammonium carbonate under conditions sufficient to produce a CO2 sequestering carbonate and an aqueous ammonium salt;
- and
- c) regenerating aqueous capture ammonia from the aqueous ammonium salt, wherein the regeneration comprises distillation with a source of alkalinity;
- to sequester CO2 from the gaseous source of CO2.
The method according to cliam 1, wherein the distillation is performed at a sub-atmospheric pressure.
Dependencies are inferred from the claim text.