The Capture and Sequestration of Carbon Dioxide

bullet1 The Technology for Capturing Carbon Dioxide
bullet2 Technologies

bullet3 Pre-combustion (Oxyfuel)

Power Generation Plant with oxyfuel combustion

    1. Flue gas is recycled to avoid excessively high combustion temperatures
    2. No flue gas recycle is needed – cooled recycled solids limit the temperature, as in conventional CFBC
    3. CO2 is recycled to the compressor to provide the expansion medium, instead of air.


Advantages

    • Combustors would be fairly conventional
    • May be able to avoid FGD
      • Store the SOx and NO2 along with the CO2

Disadvantages

    1. High cost of oxygen production
    2. Need to recycle large quantities of flue gas
      • Not needed for circulating fluidized bed combustors
      • Potential for advanced oxygen separation membranes with lower energy consumption