Geochemical Interaction between CO2 and caprock for safe carbon se-questration

Carbon dioxide (CO2) emission into the atmosphere from human activities and industrial processes continues to pose a major environmental and health threat to public safety worldwide with many governments launching initiatives to reduce the impact of CO2 emission. Carbon dioxide capture and storage (CCS) is a process of separating CO2 from industrial facilities and other point sources and injecting it in a deep geological formation such as depleted oil and gas reservoirs for long-term storage [1]. Usually, CO2 is injected into a deep formation at a depth more than 1000 m where in-situ pressure and temperature is above the critical point for CO2 (31.1°