Abstract
A unique SNCR system by activated ammonia injection using an intermittent dielectric barrier discharge (DBD)has been developed to remove NOx from an incinerator. However, the NOx reduction mechanisms are not elucidated so far. .In this paper, chemical species in the activated ammonia was investigated at the DBD reactor exit. Hydrogen was detected as main composition of the activated ammonia. The simulation gas of the activated ammonia (NH3+H2) was prepared to be clear the contribution of hydrogen, and the deNOx performance of the simulation gas was examined. It found that hydrogen has the role of enlargement of temperature window in deNOx reaction. DeNOx mechanisms were concerned using elementary reaction analysis based on Miller & Bowman mechanism. It was clear that formation of HNO and NH from hydrogen in the activated ammonia promoted deNOx reaction at low temperature region
