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标题翻译：二氧化碳和氢气的分离

公开(公告)号：WO2009013455A2

公开(公告)日：2009-01-29

申请号：PCT/GB2008/002335

申请日：2008-07-08

申请人： BP ALTERNATIVE ENERGY INTERNATIONAL LIMITED , FORSYTH, Jonathan, Alec , HARPER, Roger, Neil , HINDERINK, Antonie Pieter , HUDA, Badrul , VAN DER POL, Evert

发明人： FORSYTH, Jonathan, Alec , HARPER, Roger, Neil , HINDERINK, Antonie Pieter , HUDA, Badrul , VAN DER POL, Evert

IPC分类号： F25J3/06 , F25J3/04 , B01D53/00 , C01B3/50 , C01B31/22 , C01B31/20

CPC分类号： B01D53/002 , B01D53/229 , B01D2256/16 , B01D2256/22 , C01B3/16 , C01B3/503 , C01B3/505 , C01B3/506 , C01B3/56 , C01B2203/0283 , C01B2203/0405 , C01B2203/042 , C01B2203/046 , C01B2203/0485 , C01B2203/145 , C01B2203/146 , C01B2203/84 , C01B2203/86 , C10J3/00 , C10J2300/0903 , C10J2300/093 , C10J2300/0943 , C10J2300/0956 , C10J2300/0959 , C10J2300/0973 , C10J2300/165 , C10J2300/1675 , C10J2300/1678 , F25J3/04545 , F25J3/04563 , F25J3/04575 , F25J3/0625 , F25J3/0655 , F25J3/067 , F25J2205/40 , F25J2205/80 , F25J2215/04 , F25J2240/80 , F25J2240/90 , F25J2260/80 , F25J2270/04 , F25J2270/12 , F25J2270/60 , Y02C10/12 , Y02P20/152 , Y02P30/30

摘要： A process for separating hydrogen and carbon dioxide from a synthesis gas stream comprising carbon dioxide and hydrogen, said process comprising: (A) feeding a shifted synthesis gas stream at a pressure of at least 50 bar gauge to at least one membrane separator unit that is provided with membrane having a selectivity for H 2 over CO 2 of greater than 16 and withdrawing a hydrogen enriched permeate stream having a CO 2 content of less than 10 mole % and a carbon dioxide enriched retentate stream having a CO 2 content of at least 63 mole % CO 2 , preferably, at least 70 mole % CO 2 from the membrane separator unit; (B) feeding the carbon dioxide enriched retentate stream to a carbon dioxide condensation plant where the retentate stream is cooled to condense out liquid CO 2 by: (i) passing the carbon dioxide enriched retentate stream through a heat exchanger where the retentate stream is cooled against an external refrigerant to below its dew point thereby forming a cooled stream comprising a liquid phase and a vapour phase wherein the liquid phase comprises substantially pure liquid CO 2 and the vapour phase is enriched in hydrogen compared with the retentate stream; (ii) passing the two-phase stream from step (i) to a separator vessel wherein the liquid phase is separated from the vapour phase and withdrawing a liquid CO 2 stream and a hydrogen enriched vapour stream from the separator vessel; (iii) if the CO 2 content of the hydrogen enriched vapour stream is greater than 10 mole %, passing the vapour stream through a further heat exchanger where the vapour stream is cooled against a further external refrigerant to below its dew point thereby forming a further cooled stream comprising a liquid phase and a vapour phase wherein the liquid phase comprises substantially pure liquid CO 2 and the vapour phase is further enriched in hydrogen compared with the retentate stream; (iv) passing the two-phase stream from step (iii) to a further separator vessel wherein the liquid phase is separated from the vapour phase and withdrawing a liquid CO 2 stream and a hydrogen enriched vapour stream from the further separator vessel; and (vi) if necessary, repeating steps (iii) to (iv) until the CO 2 content of the hydrogen enriched vapour stream that is withdrawn from the further separator vessel is less than 10 mole %; (C) passing the hydrogen enriched vapour stream having a CO 2 content of less than 10 mole % that is formed in step (B) and/or the hydrogen enriched permeate stream having a CO 2 content of less than 10 mole % that is formed in step (A) as a fuel feed stream to the combustor of at least one gas turbine of a power plant at a pressure above the operating pressure of the gas turbine(s) for the production of electricity; and (D) sequestering the liquid CO 2 stream(s) formed in step (B).

摘要翻译：一种从包含二氧化碳和氢气的合成气流中分离氢气和二氧化碳的方法，所述方法包括：（A）将至少50巴表压的转移的合成气流进料至至少一个膜分离器单元，所述膜分离器单元是提供具有大于16的H 2超过CO 2的选择性的膜并且抽出具有小于10摩尔％的CO 2含量的富含氢的渗透物流和具有至少63摩尔％CO 2的CO 2含量的富含二氧化碳的滞留物流，优选来自膜分离器单元的至少70摩尔％的CO 2; （B）将二氧化碳富集的滞留物料流输送到二氧化碳冷凝装置，其中通过以下方式冷凝滞留物流以冷凝液体CO 2：（i）使富含二氧化碳的滞留物流通过热交换器，其中滞留物流被冷却外部制冷剂低于其露点，从而形成包含液相和气相的冷却流，其中液相包含基本上纯的液体CO 2，并且与滞留物流相比，气相富含氢气; （ii）将来自步骤（i）的两相流送至分离器容器，其中液相与气相分离并从分离器容器中取出液态CO 2流和富氢蒸气流; （iii）如果富含氢气的蒸汽流的CO 2含量大于10摩尔％，则使蒸汽流通过另一个热交换器，其中蒸汽流被冷却至另外的外部制冷剂至其露点以下，从而形成进一步冷却流体包含液相和气相，其中液相包含基本上纯的液体CO 2，并且与渗余物流相比，气相进一步富氢化; （iv）将来自步骤（iii）的两相流送至另一个分离器容器，其中液相与气相分离并从另外的分离器容器中取出液态CO 2流和富含氢的蒸气流; （vi）如果需要，重复步骤（iii）至（iv），直到从另外的分离器容器中排出的富氢蒸气流的CO 2含量小于10摩尔％（C）使步骤（B）中形成的CO 2含量小于10摩尔％的富氢蒸气流和/或CO 2含量小于10摩尔％的富氢渗透物流通过步骤（A）作为燃料供给流，其以高于用于生产电力的燃气轮机的工作压力的压力到达发电厂的至少一个燃气轮机的燃烧器; 和（D）隔离步骤（B）中形成的液体CO 2流。

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