> Post-combustion capture

Capturing the carbon dioxide from a typical existing power plant is referred to as post-combustion capture, in which the low-pressure exhaust gases (currently emitted to the atmosphere) are passed through a separation process. Post-combustion facilities can be retrofitted to existing power plants or provided as a feature of new plants in the future, but there is a need to bring down costs considerably. Despite the existing cost barrier, post-combustion capture is receiving increased attention because of the realisation that many existing coal-fired power stations will continue to operate for 30 years or more.

Schematic representation of post-combustion CO₂ capture.

Source: Cooperative Research Centre for Greenhouse Gas Technologies (CO2CRC) in Australian

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