Geochemical aspects of CO2 sequestration in deep saline aquifers: A review

Abstract

Carbon dioxide has been identified as one of the main compounds affecting the stability of the earth's climate. The reduction of the total volume of greenhouse gases emitted to the atmosphere is considered a key mechanism to mitigate climate change. Geological storage of CO2 in deep saline aquifers is currently a well-accepted method of storage, because saline aquifers have larger storage capacities than other geological media. Rock-water-CO2 interactions initiated in the aquifer with CO2 injection play a vital role in CO2 sequestration in saline aquifers, and include different trapping mechanisms: geological trapping, hydrodynamic trapping and geo-chemical trapping (solubility trapping and ..