Abstract: A method for separation of CO2 from the combustion gas from a thermal power plant fired with fossil fuel, wherein the combustion gas from the thermal power plant is used as cooled, compressed and reheated by combustion of natural gas in a combustion chamber to form an exhaust gas, where the exhaust gas is cooled an brought in contact with an absorbent absorbing CO2 from the exhaust gas to form a low CO2 stream and an absorbent with absorbed CO2, and where the low CO stream is heated by means of heat exchanges against the hot exhaust gas leaving the combustion chamber before it is expanded in turbines, is described. A plant for performing the method and a combined plant is also described.

Abstract: A method and an installation for alternating storage of CO2 and natural gas in a way that ensures minimal mixture of the gases, is described. CO2 and natural gas are alternately stored in a tank installation comprising a plurality of tanks connected in series, where CO2 is always filled and emptied through a first tank in the series of tanks, and where natural gas always is filled and emptied through a last tank in the series of tanks.