CO2 CAPTURE AND LIQUEFACTION

    Carbon dioxide (CO2) is a by-product or waste product of many industrial processes. Instead of releasing CO2 into the atmosphere, we capture, process, and liquefy it.
     
    The liquid end product can be processed to a high degree of purity and up to food grade quality, and can then be used in a variety of ways. This not only reduces greenhouse gas emissions, but also generates additional revenue through the marketing of liquid CO2 and GHG reduction quotas.

    CO2 RECOVERY FROM BIOGAS UPGRADING

    • Biogas, which consists mainly of methane and carbon dioxide, undergoes CO2 capture using amine scrubbing, membrane or PSA technology during the process of conversion to biomethane. The remaining CO2-rich low-grade gas (“off-gas”) has so far been regularly released into the atmosphere, contributing to environmentally harmful increases in CO2 emissions.

     

    • At the same time, however, CO2 is in demand as an important raw material in many areas of industry (e.g., in the food, beverage, and chemical industries) and is sometimes obtained from fossil fuels for this purpose.

     

    • With the CO2 liquefaction plants from ICEBERG.ENGINEERING, the CO2 produced during biogas processing and originating from biogenic sources (e.g., manure, renewable raw materials) can be captured, purified, and then liquefied. The end product is liquid bio-CO2, which can be purified to high purity up to food grade and sold on the market.

     

    • The emission savings achieved through CO2 capture have a reducing effect on the calculation of total emissions in the course of GHG accounting. This can significantly increase the economic efficiency of biomethane production.

     

    CO2 capture from biogas upgrading

    Compatible biogas upgrading systems

    • PSA technology
    • Amin washing
    • Membrane technology
    • In future also: pressurized water washing

    Compression and gas treatment

     

    • Multi-stage gas treatment individually designed according to the composition of the transferred off-gas and the desired gas quality
    • If necessary, CO2 pre-drying to reduce moisture before compression
    • Two-stage compression to process pressure
    • Drying and purification of the compressed gas
    • Removal of sulfur compounds and volatile organic compounds as well as any odors and flavors

    CO2 liquefaction

     

     

    • Liquefaction of the treated gas using cold and pressure
    • Further fine purification during liquefaction
    • Purity of liquid CO2 up to >99.95% on request (EIGA food standard)
    • Current liquefaction capacities 700 - 3,175 kg/h LCO2
    • Compact design as a skid solution
    • Optional: 24/7 quality monitoring using analysis tool