Effect of liquid additives on the low temperature denitration activity of SNCR and emission characteristics of N₂O and CO

Abstract The problem of nitrogen oxide (NO x ) emissions has attracted wide attention in the field of environmental protection. The effects of sodium hydroxide (NaOH), hydrogen peroxide (H 2 O 2 ), phenol (C 6 H 5 OH) and ethanol (C 2 H 6 OH) on the denitration activity of selective non‐catalytic reduction (SNCR) and the emission of secondary pollutants nitrous oxide (N 2 O) and carbon monoxide (CO) were investigated. Results indicated that the addition of NaOH, phenol and ethanol can improve the denitration efficiency under low temperature by providing OH. From 650°C to 750°C, ethanol had the best effect, with the denitration efficiency of 30%. From 750°C to 850°C, the denitration efficiency of phenol was 40% ~ 50%. The introduction of phenol and ethanol would increase the N 2 O and CO emissions. From 700°C to 800°C, hydrogen peroxide only caused a small amount of N 2 O emissions and had no significant effect on CO.