Method for Extracting and Sequestering Carbon Dioxide

• Main Authors: Rau, Gregory H., Caldeira, Kenneth G.
• Other Authors: United States. Department of Energy.
• Format: Patent
• Language: English
• Published: 2005
• Subjects: Mineral Wastes; Materials Recovery; Carbon Dioxide; Acid Carbonates; Hydration; Marine Disposal; Carbon Sequestration; Calcium Carbonates; Carbonic Acid; 54 Environmental Sciences; Magnesium Carbonates; Carbonic acid
• Online Access: https://digital.library.unt.edu/ark:/67531/metadc782761/

A method and apparatus to extract and sequester carbon dioxide (CO2) from a stream or volume of gas wherein said method and apparatus hydrates CO2, and reacts the resulting carbonic acid with carbonate. Suitable carbonates include, but are not limited to, carbonates of alkali metals and alkaline earth metals, preferably carbonates of calcium and magnesium. Waste products are metal cations and bicarbonate in solution or dehydrated metal salts, which when disposed of in a large body of water provide an effective way of sequestering CO2 from a gaseous environment.