304 Behavior of NH radical in DeNOx reaction by radical injection
Details
An ammonia radical injection DeNOx system using an intermittent dielectric barrier discharge (DBD) with a one-cycle sinusoidal-wave power source has been developed to reduce NOx from incinerators. When DBD plasma-generated radicals (NH_2, NH, N and H) are injected into a flue gas containing NOx, NOx is removed efficiently by chain reaction in gas phase. Energy efficiency of DeNOx in this system is 120 g-NO/kWh, which is the higher efficiency than other DeNOx systems using different plasma techniques. However, we have not been explained detailed reaction mechanism yet. In this study, emission spectrum of NH radical was investigated by emission spectroscope. Maximum emission spectrum of NH radical was obtained at an applied voltage of 12 kV for a NOx reduction agent flow rale of 15 L/min and a NH_3 concentration of 500 ppm.
