PROCESS FOR REMOVING ACID GAS FROM NATURAL GAS

• Main Authors: FIVELAND, TORBJOERN, AASEN, KNUT, INGVAR
• Format: Patent
• Language: English; French
• Published: 12.07.2012
• Subjects: ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSEGASES [GHG]; CHEMISTRY; FIRELIGHTERS; FUELS; FUELS NOT OTHERWISE PROVIDED FOR; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LIQUEFIED PETROLEUM GAS; LUBRICANTS; METALLURGY; NATURAL GAS; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TRANSPORTING

The invention relates to the treatment of natural gas and other gas streams containing methane and at least one acid gas, such as carbon dioxide. More particularly, the invention involves contacting the raw natural gas feed stream with a separation membrane to obtain a natural gas product stream rich in methane and having a carbon dioxide content reduced to a first level relative to the raw natural gas stream. Subsequently, the natural gas product stream is passed through a rotating absorption zone, in order to obtain a sweetened natural gas product having a carbon dioxide content reduced to a second level relative to the raw natural gas stream. La présente invention concerne le traitement du gaz naturel et d'autres flux gazeux contenant du méthane et au moins un gaz acide comme le dioxyde de carbone. Plus particulièrement, la présente invention implique la mise en contact du flux d'alimentation en gaz naturel brut avec une membrane de séparation pour obtenir un flux de produit de gaz naturel riche en méthane et de teneur en dioxyde de carbone réduite jusqu'à un premier niveau par rapport au flux de gaz naturel brut. Ensuite, le flux de produit de gaz naturel passe à travers une zone d'absorption rotative pour obtenir un produit de gaz naturel adouci de teneur en dioxyde de carbone réduite jusqu'à un second niveau par rapport au flux de gaz naturel brut.