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    • 8. 发明授权
    • Hybrid process using a membrane to enrich flue gas CO2 with a solvent-based post-combustion CO2 capture system
    • 使用膜的混合工艺利用溶剂型后燃烧二氧化碳捕集系统来丰富烟道气CO2
    • US09409120B2
    • 2016-08-09
    • US14591392
    • 2015-01-07
    • University of Kentucky Research Foundation
    • Kunlei LiuReynolds A. FrimpongKun Liu
    • B01D53/22B01D53/14F01K23/06
    • B01D53/229B01D53/1425B01D53/1443B01D53/1475B01D2053/221F01K23/067Y02A50/2342Y02C10/06Y02C10/10Y02E20/18
    • A process for recovery of CO2 from a post-combustion gas includes pre-concentrating a CO2 component of the post-combustion flue gas by passing the post-combustion gas through a CO2-selective membrane module to provide a CO2-enriched permeate stream and a CO2-lean reject stream. Next, in a CO2 absorber, both the CO2-enriched permeate stream and CO2 lean reject stream, fed to separate feed locations on the CO2 absorber, are contacted with a scrubbing solvent to absorb CO2 and provide a carbon-rich scrubbing solvent. Finally, absorbed CO2 is stripped from the carbon-rich scrubbing solvent by a two-stage CO2 stripping system. The CO2-selective membrane may be a high flux, low pressure drop, low CO2 selectivity membrane. The two stage stripping system includes a primary CO2 stripping column for stripping CO2 from the carbon-rich scrubbing solvent exiting the CO2 absorber, and a secondary CO2 stripping column for stripping CO2 from a carbon-lean scrubbing solvent exiting the primary CO2 stripping column. Apparatus for CO2 removal from post-combustion gases in a pulverized coal power plant incorporating the described processes are described.
    • 用于从后燃烧气体回收CO 2的方法包括通过使后燃烧气体通过CO 2选择性膜组件来预浓缩后燃烧烟道气的CO 2组分,以提供富含CO 2的渗透物流和 贫二氧化碳排放流。 接下来,在CO 2吸收器中,将进料到CO 2吸收器上的分离的进料位置的富含CO 2的渗透物流和CO 2贫废物流与洗涤溶剂接触以吸收CO 2并提供富碳洗涤溶剂。 最后,通过两级二氧化碳汽提系统从富含碳的洗涤溶剂中除去吸收的二氧化碳。 CO 2选择性膜可以是高通量,低压降,低CO 2选择性膜。 两级汽提系统包括用于从离开CO 2吸收器的富碳洗涤溶剂中汽提二氧化碳的初级CO 2汽提塔和用于从离开主CO 2汽提塔的贫碳气洗涤溶剂中汽提二氧化碳的二级CO 2汽提塔。 描述了包含所述方法的粉煤发电厂从后燃烧气体中除去CO 2的装置。