| abstract |
A process for removing CO2 from a CO2 containing gas stream in which the CO2 containing gas stream is contacted with an aqueous ammonium solution. The aqueous ammonia solution comprises 0.1 - 40 % w/v, v/v/ w/w ammonia, and a soluble salt at a concentration range of 0.01% - 10% wt or v/v or w/v, the soluble salt having cations selected from the group of group IA, IIA, IIIA and IVA metals with counter anions selected from the group of anion of group VIIA elements, NO3-, SO4 2-, OH-, PO4 3- and HCO3-. The invention also extends to a CO2 capture solvent comprising an aqueous ammonia solution and the above soluble salt. |