A Study on the NO Reduction Rate According to Temperature and Residence Time in the Exhaust Gas Atmosphere Emitted on Combustion of Air and Oxygen.

NO is a hazardous greenhouse gas. It should be reduced to solve global warming problems. In this study, experiments of NO thermal decomposition were conducted by simulating the exhaust gas atmosphere emitted during the combustion of air and pure oxygen in an actual circulating fluidized bed system and incinerator system. As a result of comparing the NO reduction rate in N and CO atmospheres, the NO reduction rate in the CO atmosphere was 20% higher than that in the N atmosphere. It is judged that the NO reduction rate is high in a CO atmosphere (exhaust gas from pure oxygen combustion) due to complex factors such as the reverse reaction, the diffusion coefficient, and static pressure-specific heat. Therefore, pure oxygen combustion increases the reduction rate of nitrous oxide. In addition, when operated with an appropriate residence time and temperature, a reduction effect of more than 95% can be expected, and the fuel consumption rate is also expected to improve.