An experiment was performed to study the removal of NOx pollution and formation of greenhouse gas (N2O) and CO in NOxOUT process. Kinetic analysis was combined with the experiment results to discuss the effect of additives. The optimum reaction temperature was 950℃ and the highest denitration efficiency could reach 76.33% with different normalized stoichimetric ratios (NSR). The formation curves of N2O with temperature were similar to the efficiency curve and N2O emission reached a peak value at the temperature around 950℃. Increasing NSR and O2 concentration made N2O emission level higher. N2O emission first increased and then decreased with increasing residence time at higher temperatures (950℃

1000℃). Sodium carbonate

sodium acetate

sodium glutamate and ethanol could effectively improve the denitration efficiency on the low temperature side and extend corresponding temperature window

especially obviously for sodium glutamate. Denitration efficiency was related to temperature when altering the concentration of sodium salts and the optimum addition amount was 60 ml·L-1 for sodium atom. Above-mentioned additives could all remarkably reduce the emission of N2O and CO at medium and high temperatures

but adversely at the end point of low temperature. N2O and CO emission presented respective variation trends with the differences of temperature

type and concentartion of additives.