CO2 (g) + H2O (l) ↔ CO2 (aq) ↔ H2CO3 (aq) ↔ HCO3- + H+ ↔ CO2 + 2H+ (2.1) (Qanbari et al., 2011)
2.2.2 Mineral …show more content…
Carbonation can take place either in situ or ex situ (Azdarpour et al., 2014). One major benefit of CO2 sequestration by mineral carbonation is that CO2 remains environmentally benign and virtually permanently trapped in the form of carbonated minerals by using abundant mineral resources such as Mg-silicates. In addition to benefits of mineral carbonation, this option is the only CO2 sequestration option where large underground reservoirs do not exist and ocean storage of CO2 is not feasible. The major drawback of this method is slow rate of reactions. Therefore attempts are being made to speed up the carbonation reaction using various methods such as additives, heating and pressurizing the carbonation