The novel aspect of the proposed system is the use of the CO2-rich combustion gases in the production of solid magnesium carbonate-containing salt formed by contacting the combustion gases with the magnesium-rich retentate of a Reverse Osmosis Desalination Plant. The solids which are formed may be combined with other cementitious products.
The conceptual sequestration process is designed to handle large quantities of aqueous solution. The process requires a fixed source of carbon dioxide, for example exhaust gas from a gas-fired power station or a cement plant, as well as a source of Mg and hydroxide ions. It does not require high pressures or temperatures or solvents other than water.