Nitrogen transformation during coal decoulping combustionⅡ: NO and N₂O reduction with single component of pyrolysis gas

Reduction of NO and N₂O with the simulated pyrolysis gas has been experimentally studied in an ideal plug flow reactor. The influences of reaction temperature, excess air number λ, concentrations of CH₄, CO, H₂, NH₃ in the simulated pyrolysis gas, concentrations of NO and N₂O in the flue gas on concentration of NO as well N₂O and total nitrogen conversion efficiency have been discussed. The results show that CH₄, CO and H₂ cannot effectively react with NO at 973~1 223 K. About 0~30% of the inlet N₂O can be reduced by CH₄, CO, or H₂ when λ is equal to or less than 1.0. Furthermore, about 10%~60% of the inlet NO can be reduced by NH₃, however, no N₂O concentration change is found when N₂O is mixed with NH₃ at 973~1 223 K.