Patent ID: 8293200

Claim:
A process for desulfurization of, and removal of carbon dioxide from, gas mixtures, comprising the steps of: (a) contacting in a desulfurization stage a flue gas comprising SO 2 with a scrubbing liquor comprising an alkaline compound and, optionally, with oxidation air, to remove SO 2 from the flue gas; (b) contacting in a carbon dioxide absorption stage a second gas stream comprising CO 2 with an absorption liquid comprising ammonia, to remove CO 2 from the second gas stream; (c) subjecting the scrubbing liquid, the flue gas or the oxidation air to heat exchange, in a heat exchanger, with used absorption liquid resulting from step (b), to heat the used absorption liquid; and (d) regenerating the absorption liquid by releasing CO 2 from the heated used absorption liquid resulting from step (c).