Integrated process for native CO2 recovery from a sour gas comprising H2S and CO2

US9994452B2 · kind B2 · utility

Assignees

• TOTAL SA · FR
• L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR

Inventors

• Claire Weiss · Vaucresson, FR
• Kamlesh Ghodasara · Borehamwood, GB
• Frederic Pousse · Moissy-Cramayel, FR
• Wolfgang Nehb · Frankfurt am Main, DE
• Eckhard Jungst · Villefontaine, FR
• Stefan Fraenkle · Frankfurt am Main, DE
• Sandeep K. KARODE · Boothwyn, US
• Sylvain Gerard · Saint-Cloud, FR
• Nicolas Chambron · Saint-Maur-des-Fossés, FR

Key dates

• Filing date: Jun 13, 2013
• Grant date: Jun 12, 2018
• Expiry date: Jun 13, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02P20/151
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

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), and the device for carrying out said method.