INTEGRATED PROCESS FOR NATIVE CO₂ RECOVERY FROM A SOUR GAS COMPRISING H₂S AND CO₂

摘要

The invention relates to a method for treating a hydrocarbon feed gas stream containing CO₂ and H₂S to recover a purified CO₂ gas stream (vii), comprising: a. separating said feed gas stream into a sweetened gas stream (i), and an acid gas stream (ii); b. introducing stream (ii) into a Claus unit wherein an oxygen-rich stream is used as a combustive agent in the Claus furnace, thereby recovering a liquid stream of elemental sulfur (iii) and a tail gas stream (iv); c. introducing the stream (iv) into a Tail Gas Treatment Unit (TGTU) thereby separating said tail gas stream into a CO₂ enriched gas stream (v), and a stream enriched in sulfur compounds (vi); d. compressing stream (v) exiting the TGTU; e. passing the compressed CO₂ enriched gas through a CO₂ purification unit thereby recovering a purified CO₂ gas stream (vii); the invention also relates to a device for carrying out said method.