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The Capture and Sequestration of Carbon Dioxide | | |
Pre-combustion (Oxyfuel)

Power Generation Plant with oxyfuel combustion
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Flue gas is recycled to avoid excessively high combustion temperatures
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No flue gas recycle is needed – cooled recycled solids limit the temperature, as in conventional CFBC
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CO2 is recycled to the compressor to provide the expansion medium, instead of air.
Advantages
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Combustors would be fairly conventional
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May be able to avoid FGD
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Store the SOx and NO2 along with the CO2
Disadvantages
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High cost of oxygen production
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Need to recycle large quantities of flue gas
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Not needed for circulating fluidized bed combustors
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Potential for advanced oxygen separation membranes with lower energy consumption
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