OxyCoal™ Firing as a Carbon Capture technology achieves its results by separating air into two primary components, oxygen and nitrogen, and then fires the coal in the oxygen. The resulting flue gas, comprising mainly CO2 and water vapour, can be directly compressed to remove the water vapour and capture the CO2, leaving only a small quantity of inert gases to be vented into the atmosphere.

Doosan Babcock has adopted an evolutionary approach to the design and implementation of OxyCoal™ technology combining well proven and commercially available components with state-of-the-art advances in technology.  This approach to OxyCoal™  CO2 capture can be applied to conventional coal-fired utility boilers without the need for major pressure part modifications to both new build and retrofitable existing plants. The OxyCoal™  fired plant retains a full air-firing capability thereby minimising the commercial risk of the early adoption of the technology.
 
In the OxyCoal™ process the nitrogen is removed prior to combustion taking place using an air separation plant. It is necessary to dilute the oxygen with recycled flue gas in order to maintain the combustion characteristics, the radiant heat fluxes and convective heat transfer performance similar to conventional air-firing.

Doosan Babcock is currently undertaking the largest OxyCoal™ Firing of its kind in the world at our full scale 40MW burner facility in Renfrew, Scotland.