METHOD FOR TREATING SMOKE CONTAINING CARBON DIOXIDE

The invention relates to a method for treating smoke produced in at least one upstream unit (2) operating at a nominal operating pressure, this smoke containing 5 mol.% to 90 mol.% of carbon dioxide (CO2) on a wet basis and being at a pressure of between 0.5 and 2 bar absolute, preferably between 0.9 and 1.1 bar absolute, said method comprising the following steps: - treating, by at least one downstream treatment unit (3), all or substantially all of the stream of smoke originating from the upstream unit or upstream units, in order to produce, from said smoke, a CO2-rich gaseous or liquid stream which contains more than 50 mol.%, preferably more than 75 mol.%, or even more than 95 mol.%, of CO2; - allowing the stream of smoke to communicate, between the upstream unit and the downstream unit, via an outlet line (24), with a chimney (22) opening into the atmosphere, and this outlet line is left open or partially open in nominal operation so as to allow the pressure in the stream of smoke to be equalised with atmospheric pressure.