Optimized Multi-pollutant Control in Oxy-fuel Combustion Systems Using CO2 Capture and Compression Process

AbstractIn conventional fossil fuel power plants, SOx and NOx are removed via flue gas desulfurization units (FGDs) and selective catalytic or non-catalytic reduction units (SCRs and NSCRs) or by other processes, which increase CAPEX and OPEX of the plant. Oxy-fuel combustion with CO2 capture and compression provides new means for efficient removal of these pollutants. This is done within the compression and cooling inter-stages of the CO2 capture unit, hence eliminating the need for upstream FGDs and SCRs. This paper provides the preliminary results from a test campaign carried out at CanmetENERGY's 0.3MWthermal integrated oxy-fuel research facility. Results show significant removal rates for SOx (>90%) and NOx (∼50%) and provide insight for maximizing the removal of these pollutants with simple modifications to the unit