LOW ENERGY CYCLIC METHOD THAT USES SOLUBLE METALLIC SALTS IN ALKALINE WASTES TO SEQUESTER CARBON DIOXIDE

摘要

The proposed invention uses a cyclic technique for C02 sequestration with soluble metallic salts (e.g. Ca2+, Mg2+, Fe2+, Al2+ ) in alkaline waste materials to produce respective metal carbonates. The hydroxide source comes from waste alkaline materials (e.g. C-fly ash, red mud) while the C02 source is flue gas or similar. In terms of equipment the process uses pumps, Filter/Clarifier technologies, and a purge reactor to cycle the respective streams continuously thus the cyclic alkaline waste (CAW) carbon capture process. All byproducts of the CAW process are safe to dispose to sea or marketed which include metal carbonates and processed fly ash.