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    Two-stage method for removing CO2 from synthesis gas
    1.
    发明授权
    Two-stage method for removing CO2 from synthesis gas 有权

    公开(公告)号：US11000796B2

    公开(公告)日：2021-05-11

    申请号：US16320183

    申请日：2017-07-27

    申请人： BASF SE

    发明人： Torsten Katz ,  Ralf Notz ,  Christian Kunkelmann

    IPC分类号： B01D53/14 ,  C01B3/52 ,  C10K1/00

    摘要： In a process for removing CO2 from a fluid stream by means of an aqueous absorption medium, a) the fluid stream is introduced into a first absorption zone and treated with partially regenerated absorption medium, b) the treated fluid stream is treated with regenerated absorption medium in a second absorption zone, giving a fluid stream which has been freed of CO2 and a loaded absorption medium, c) the loaded absorption medium is depressurized in a first flash vessel to a pressure of from 1.2 to 3 bar absolute, giving a sub-partially regenerated absorption medium and a first CO2-comprising gas stream, d) the sub-partially regenerated absorption medium is depressurized in a second flash vessel to a pressure of from 1 to 1.2 bar absolute, giving a partially regenerated absorption medium and a water vapor-comprising, second CO2-comprising gas stream, e) a substream of the partially regenerated absorption medium is fed into the first absorption zone and a further substream of the partially regenerated absorption medium is fed into a stripper in which the partially regenerated absorption medium is thermally regenerated, with regenerated absorption medium and a third CO2-comprising gas stream being obtained and the stripper being operated at a pressure which is at least 0.9 bar higher than the pressure in the first flash vessel, f) the regenerated absorption medium is recirculated to the second absorption zone, g) the water vapor-comprising, second CO2-comprising gas stream is compressed by means of a jet pump and brought into direct heat exchange contact with the loaded absorption medium in the first flash vessel, with the jet pump being operated by means of the third CO2-comprising gas stream. The latent heat of the water vapor-comprising gas streams remains in the process and the use of a costly compressor is dispensable.

    TWO-STAGE METHOD FOR REMOVING CO2 FROM SYNTHESIS GAS
    3.
    发明申请
    TWO-STAGE METHOD FOR REMOVING CO2 FROM SYNTHESIS GAS 有权

    公开(公告)号：US20210220769A1

    公开(公告)日：2021-07-22

    申请号：US17224188

    申请日：2021-04-07

    申请人： BASF SE

    发明人： Torsten KATZ ,  Ralf Notz ,  Christian Kunkelmann

    IPC分类号： B01D53/14 ,  C01B3/52 ,  C10K1/00

    摘要： A plant for removing CO2 from a fluid stream via an aqueous absorption medium contains a) a first absorption zone for treating the fluid stream with a partially regenerated absorption medium, b) a second absorption zone for treating the treated fluid stream with a regenerated absorption medium, c) a first flash vessel for depressurizing the loaded absorption medium, d) a second flash vessel for depressurizing the sub-partially regenerated absorption medium, e) a stripper for thermally regenerating the partially regenerated absorption medium, f) a conduit for feeding a substream of the partially regenerated absorption medium into the first absorption zone and a conduit for feeding a further substream of the partially regenerated absorption medium into a stripper, g) a conduit for recirculating the regenerated absorption medium to the second absorption zone, and h) a jet pump for compressing the water vapor-comprising, second CO2-comprising gas stream.