Process and plant for gas mixtures containing acid gas treatment

Process for treatment of gas mixtures containing one or more acid gases to remove said one or more acid gases from the gas mixtures, comprising

• an absorption step performed on a gas mixture containing one or more acid gases by means of a solvent system containing or capable of forming, by reaction with one or more acid gases, at least one liquid absorption solvent for removing from the gas mixture the acid gas(es) contained therein and forming a lean gas mixture, from which at least part of the acid gas(es) have been removed, and an enriched solvent containing the acid gas(es);
• and
• a regeneration step, in which the enriched solvent is subjected to a gas/liquid separation step by a flash process to be separated from the absorbed acid gas(es) and to produce an acid gas flow and a regenerated solvent which is recirculated to the absorption step;
• wherein the solvent system contains or is capable of forming, by reaction with one or more of said acid gases, at least one liquid absorption solvent selected from switchable ionic liquids.