| abstract |
The present invention relates to a method for removing CO2 and / or H2S from gases containing CO2 and / or H2S by means of an aqueous absorption liquid containing an alkanolamine, in which the gases containing CO2 and / or H2S are absorbed in an absorption stage at temperatures from 40 to 100 ° C treated with an aqueous absorption liquid containing 20 to 70% by weight of methyldiethanolamine, the treated gases are drawn off at the top of the absorption stage, the aqueous absorption liquid laden with CO2 and / or H2S is drawn off at the bottom of the absorption stage and expanded in at least two relaxation stages for regeneration and the last relaxation stage is operated at reduced pressure compared to atmospheric pressure and the regenerated absorption liquid is returned to the absorption stage. |