The present invention relates to a method for capturing CO.sub.2 from
exhaust gas in an absorber (A1), wherein the CO.sub.2 containing gas is
passed through an aqueous absorbent slurry wherein said aqueous absorbent
slurry comprises an inorganic alkali carbonate, bicarbonate and at least
one of an absorption promoter and a catalyst, and wherein the CO.sub.2 is
converted to solids by precipitation in the absorber, said slurry having
the precipitated solids is conveyed to a separating device (F1), in which
the solids are separated off, essentially all of at least one of the
absorption promoter and catalyst is recycled together with the remaining
aqueous phase to the absorber.