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    • 2. 发明申请
    • PROCESS FOR REMOVING CARBON DIOXIDE FROM A GAS STREAM
    • 从气体流中除去二氧化碳的方法
    • WO2012076597A1
    • 2012-06-14
    • PCT/EP2011/072062
    • 2011-12-07
    • SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.GEUZEBROEK, Frank HaikoKONIJN, GerritZHANG, Xiaohui
    • GEUZEBROEK, Frank HaikoKONIJN, GerritZHANG, Xiaohui
    • B01D53/14B01D53/62
    • B01D53/1425B01D53/1475B01D53/1493B01D53/62B01D2252/103B01D2252/20431B01D2252/20436B01D2257/504Y02A50/2342Y02C10/04Y02C10/06Y02C20/20
    • The invention provides a process for removing carbon dioxide from a gas stream comprising the steps of: (a) contacting the gas stream with an absorption solvent to obtain a gas stream with a reduced carbon dioxide content and a carbon dioxide-containing absorption solvent; (b) withdrawing at least part of the gas stream with the reduced carbon dioxide content; (c) withdrawing at least part of the carbon dioxide-containing absorption solvent obtained in step (a) and heat it to obtain a mixture comprising a gas phase, an aqueous liquid phase and a non-aqueous liquid phase, wherein carbon dioxide is predominantly present in the gas phase; (d) introducing at least part of the mixture obtained in step (c) into a gas lift reactor to further release carbon dioxide absorbed in the aqueous liquid phase and the non aqueous liquid phase, whereby the gas phase establishes circulation and mixing of the aqueous liquid phase and the non-aqueous liquid phase between a lower section of the gas lift reactor and an upper section of the gas lift reactor; (e) withdrawing a gas stream comprising carbon dioxide from the gas lift reactor; (f) withdrawing a mixture of the aqueous liquid phase and the non-aqueous liquid phase from the gas lift reactor, which mixture has released carbon dioxide, and (g) cooling at least part of the mixture of the aqueous liquid phase and the non¬ aqueous liquid phase to obtain regenerated absorption solvent.
    • 本发明提供了一种从气流中除去二氧化碳的方法,包括以下步骤:(a)使气流与吸收溶剂接触以获得具有降低的二氧化碳含量的气流和含二氧化碳的吸收溶剂; (b)以二氧化碳含量降低排出至少部分气流; (c)取出步骤(a)中得到的含二氧化碳的吸收溶剂的至少一部分,并加热,得到包含气相,水相液相和非水液相的混合物,其中二氧化碳主要是 存在于气相中; (d)将步骤(c)中获得的混合物的至少一部分引入提升反应器,以进一步释放吸收在水性液相和非水性液相中的二氧化碳,由此气相建立水相 气相反应器的下部和气举反应器的上部之间的非水液相; (e)从提升反应器中取出包含二氧化碳的气流; (f)从气体提升反应器中取出含水液相和非水液相的混合物,该混合物释放出二氧化碳,和(g)冷却水性液相和非水溶液的至少一部分混合物 ¬水性液相,得到再生吸收溶剂。