Comparison of particulate formation and ash deposition under oxy-fuel and conventional pulverized coal combustions

► Comparison between conventional and oxy-coal modes was done in a self- sustained coal combustor. ► Oxy-fuel mode causes more submicron particles and finer bulk ash particles. ► Aerodynamic factor determines the difference in ash deposition behavior of two modes. ► The data of a self-sustained combustor differ from those of drop tube rectors.