Impact of Caprock Type on Geochemical Reactivity and Mineral Trapping Efficiency of CO2

CO2 capture and storage (CCS) is an important method to mitigate greenhouse gas (GHG) emissions by injecting CO2 into deep geological formations such as depleted hydrocarbon, unminable coal beds, and deep saline aquifers. However, due to the density variations between the supercritical CO2 and formation water, CO2 migrates upwards to the atmosphere. The risk of this CO2 migration can be prevented by different trapping mechanisms (e.g. structural...