Ifp Energies Nouvelles

Agnes Leroy

Gauthier Perdu

Nicolas Laloue

Sebastien Gonnard

Method of decarbonating a hydrocarbon gas, a natural gas for example, by washing with a solvent. Said gas is contacted with an absorbent solution so as to obtain a CO-depleted gas and a CO-laden absorbent solution. The CO-laden absorbent solution is then heated and expanded at a predetermined pressure and temperature so as to release a hydrocarbon-containing gaseous fraction and to obtain a hydrocarbon-depleted absorbent solution, said pressure and temperature being so selected that said gaseous fraction comprises at least 50% of the hydrocarbons contained in said CO-laden absorbent solution and at most 35% of the COcontained in said CO-laden absorbent solution. Finally, the hydrocarbon-depleted absorbent solution is thermally regenerated so as to release a CO-rich gaseous effluent and to obtain a regenerated absorbent solution.

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Lyons, France

Agnes Leroy