Emission Characteristics of the 0.2 MW Oxy-fuel Combustor

Abstract

The emission characteristics of the 0.2 MW LNG oxy-fuel combustor have been experimentally investigated for the wide operating range of oxidizer velocity. The detailed in-flame data of temperature and concentrations, such as O2, CO2, CO, and NO, are measured for the oxy-fuel combustor. Nitrogen (3%) is mixed with oxygen to experimentally simulate the NOx emission characteristics in the industrial oxy-fuel furnaces, where nitrogen comes from air infiltration or inherent nitrogen in fuel or oxygen as impurities. Special emphasis is given to the effects of the oxidizer velocity on entrainment of product gases, NO emission, and flame structure in the oxy-fuel combustors. The experimental results obtained in the present study suggest that oxidizer velocity at the oxy-fuel combustor could be one of the crucial design parameters to control the NO emission.