Cryogenic CO2 Capture Using Cold Energy from LNG
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.