CO2 CAPTURE USING CARBONATE SORBENTS

A system for capturing CO2 gas comprising: a gaseous feed stream having an initial concentration of the CO2 gas; wherein the gaseous feed stream is provided to a first reactor as a gaseous reaction stream; the first reactor comprising a sorbent composition and the gaseous reaction stream flowing therein, the gaseous reaction stream being in contact with the sorbent composition; and a first gaseous output stream having a concentration of CO2 being less than the initial concentration of CO2; wherein: the gaseous reaction stream comprises the CO2 gas and is characterized by a relative humidity of at least 5%; the sorbent composition comprises a metal carbonate material that reacts with the CO2 gas of the gaseous reaction stream thereby reducing CO2 gas concentration; and the first reactor comprises 35 wt. % or less of liquid water by weight of sorbent and liquid water.