Carbon dioxide sequestration by direct mineral carbonation: process mineralogy of feed and products

Direct mineral carbonation was investigated as a process to convert gaseous CO^sub 2^ into a geologically stable final form. The process utilizes a slurry of water, with bicarbonate and salt additions, mixed with a mineral reactant, such as olivine (Mg^sub 2^SiO^sub 4^) or serpentine [Mg^sub 3^Si^sub 2^O^sub 5^(OH)^sub 4^]. Carbon dioxide is dissolved into this slurry, resulting in dissolution of the mineral and precipitation of magnesium carbonate (MgCO^sub 3^).