Cryogenic CO2 Capture Using Cold Energy from LNG

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Cryogenic CO2 capture using cold energy from LNG : innovative synergies between LNG terminals and nearby industries.

Within the R&D activities on CO2 capture, transport and storage, GDF SUEZ Innovation & Research Department is conducting a series of studies on the three main options for capture (i.e. oxyfuel/chemical looping, pre-combustion and post-combustion), the two options for CO2 transport (i.e. pipelines and ships) and CO2 storage in partnership with universities, R&D centers, industries and the French National Research Agency (ANR).

Innovative options for capture :
As part of GDF SUEZ Innovation & Research Department, CRIGEN was also involved in an innovative CO2 capture technology using cold, through the ANR Project CO2Sublim built around a partnership with ARMINES1 , which has developed a process for CO2 capture by frosting (“antisublimation” in French). A laboratory mock-up has already been built by ARMINES in order to validate the concept feasibility. The project was proceeded between November 2006 and end of February 2008.

As a next step, CRIGEN and its partners are developing an improvement of this CO2 cryogenic capture system – allowing energy consumption decrease – using free cold from LNG available on LNG terminals.

This technology uses the cold energy released during LNG re-gasification process to freeze out and then liquefy the CO2 from industrial flue gases (power plant, steel or cement industry …). The high-pressure liquid CO2 could be easily transported by ships for Enhanced Gas or Oil Recovery application or for geological storage.
By using potential synergies between a CO2 source and a LNG terminal, this technology will significantly reduce the cost of carbon dioxide capture. Thus, this technology process could be a good alternative to CO2 solvent technologies and presents many advantages such as :
-> Atmospheric capture of diluted flue gases (like solvents processes),
-> High purity of captured CO2,
-> Integrated removal system of common pollutants in the flue gases,
-> Liquefied and pressurized CO2 ready for shipping or pipeline transportation,
-> Less energy consumption than amines technologies,
-> Thermal and physical process instead of chemical process (solvents),
-> Reduced impact of CO2 capture on global efficiency.


One Response to “Cryogenic CO2 Capture Using Cold Energy from LNG”

  1. Brian Alastair

    A novel post-combustion CO2 capture process concept is proposed and developed, based on cryogenic CO2 freeze-out in dynamically operated packed beds. When feeding a flue gas containing CO2, H2O and inert gases to a previously refrigerated packed bed, an effective separation between CO2, H2O and the permanent gases can be achieved on the basis of differences in dew and sublimation points. Temperature and concentration fronts will develop, which move through the bed with different velocities. H2O and CO2 will condensate and desublimate, respectively, extracting the cold energy stored in the packing and therefore avoiding unacceptable pressure drop or plugging. Great advantage is that both H2O and CO2 can be separated from a flue gas simultaneously, circumventing costly pretreatment steps. Furthermore, no chemical absorbent or elevated pressures are required.

    Experiments have been carried out and demonstrated that CO2 can be well separated from N2. The process is described by a pseudo-homogeneous 1D model. The resulting simulations show good resemblance with experiments.

    Checkout !

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