A Study on the N₂O Reduction Rate According to Temperature and Residence Time in the Exhaust Gas Atmosphere Emitted on Combustion of Air and Oxygen

N₂O is a hazardous greenhouse gas. It should be reduced to solve global warming problems. In this study, experiments of N₂O 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 N₂O reduction rate in N₂ and CO₂ atmospheres, the N₂O reduction rate in the CO₂ atmosphere was 20% higher than that in the N₂ atmosphere. It is judged that the N₂O reduction rate is high in a CO₂ 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.