Methods and Compositions for the Sequestration of Carbon Dioxide
AssigneeCarbonfree Chemicals Holdings, LLC
InventorJoe JONES
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Abstract
The present invention relates to methods for capturing carbon dioxide and permanently sequestering carbon dioxide in the form of Group II metal carbonates. The invention involves production of HCl by reacting steam with a material that includes a magnesium chloride hydrate. The HCl that is generated from this process is used to leach Group II mineral salts from a variety of different materials, including minerals and industrial waste materials. The leached Group II mineral salts are used to capture carbon dioxide by forming Group II mineral salt carbonates.
Claims21
A method of employing a waste material or geological silicate mineral to sequester carbon dioxide, the method comprising:
- reacting a magnesium chloride hydrate-containing material with steam to generate HCl and Mg(OH)2;
- contacting the Mg(OH)2 with a gas stream comprising carbon dioxide to provide a partially or fully carbonated stream comprising Mg(OH)x(HCO3)y where x+y=2;
- contacting waste material or geological silicate mineral with the HCl and optionally water to leach mineral ion salts from the waste material or geological silicate mineral into a brine or slurry;
- recovering the mineral ion salts from the brine or slurry;
- and
- reacting the mineral ions salts with the partially or fully carbonated stream to sequester carbon dioxide in the form of mineral ion carbonate salts comprising calcium carbonate.
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Dependencies are inferred from the claim text.