Reduction of the flue gas recirculation rate in oxycoal processes by means of non-stoichiometric burner operation

► CCS systems processes are seen as a promising route towards reducing carbon emissions while being able to utilize coal. ► Operating oxyfuel burners under non-stoichiometric oxygen rich conditions leads to flame temperatures similar to air combustion. ► By combining two or more non-stoichiometric burners in one boiler global stoichiometry similar to conventional oxyfuel combustion can be reached. ► Characteristic flame zones could be observed when analysing radial profiles of the flame regarding emissions.