CFD modelling of air-fired and oxy-fuel combustion in a large-scale furnace at Loy Yang A brown coal power station

► A CFD model is developed to investigate the Brown coal oxy-fuel-fired in a 550 MW utility boiler. ► This oxy-fired study in a large-scale boiler is important prior to its implementation in a real-life. ► A noticeable decrease in the NOx formation were observed under all oxy-fuel combustion scenarios. ► O2-enriched atmospheres of oxy-fuel-fired cases showed slight increase in the carbon burnout rate.