Abstract: A method for separating CO2 from combustion exhaust gas includes discharging the CO2-containing combustion exhaust gas mass flow into the carbonator of a carbonate looping system having at least one carbonator and one calciner. Combining the CO2 of the combustion exhaust gas mass flow with a carbonate-forming sorbent inside the carbonator to form a carbonate. Sending the carbonate as a carbonate-solids mass flow is sent to the calciner. Burning the carbonate at the carbonate-specific calcination temperature by the addition of heat provided by an additional firing that uses oxygen as the oxidant, whereby regenerated sorbent and a gas essentially containing CO2 is formed. Sending the hot regenerated sorbent to the carbonator as a sorbent-solids mass flow for carbonization of CO2, and discharging the hot gas as gas mass flow.

Abstract: A method for separating CO2 from combustion exhaust gas includes discharging the CO2-containing combustion exhaust gas mass flow into the carbonator of a carbonate looping system having at least one carbonator and one calciner. Combining the CO2 of the combustion exhaust gas mass flow with a carbonate-forming sorbent inside the carbonator to form a carbonate. Sending the carbonate as a carbonate-solids mass flow is sent to the calciner. Burning the carbonate at the carbonate-specific calcination temperature by the addition of heat provided by an additional firing that uses oxygen as the oxidant, whereby regenerated sorbent and a gas essentially containing CO2 is formed. Sending the hot regenerated sorbent to the carbonator as a sorbent-solids mass flow for carbonization of CO2, and discharging the hot gas as gas mass flow.

Abstract: A method for combustion of a carbon-containing fuel, especially a fossil fuel, further preferred coal. The flue gas is at least dedusted, is desulfurized with an absorbent containing calcium compounds, and in a two-stage high temperature process is decarbonized with calcium oxide in a carbonator accompanied by formation of calcium carbonate and the calcium carbonate is regenerated in a calcinator, while heat is supplied and while carbon dioxide is set free, to form calcium oxide, which is recirculated into the carbonator. At least to one of the stages of the high temperature process fresh calcium containing absorbent is added. Calcium compounds from the carbonator and/or calcinator are used as absorbent with the flue gas desulfurization.