7-90-8 アンモニアラジカルインジェクション法脱硝装置の開発(Session 7 環境対策・リサイクル,ポスター発表)

概要

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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 remove NOx in flue gas from combustors. 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, reaction mechanisms have not been explained detailed yet. In this study, emission spectra of NH radical were investigated by an emission spectroscope. Maximum emission intensity of NH radical was obtained at an applied voltage of 13 kV, an NH_3 flow rate of 15 L/min, and an NH_3 concentration of 400 ppm.
2009-07-30