Analysis of no reduction mechanism by volatiles from coal pyrolysis

The NO reduction by volatiles from bituminous coal pyrolysis was simulated by adopting detailed chemical kinetics mechanism. The reaction condition was determined under 0.1MPa and 1273-1573 K, and the coal is Zhunger bituminous coal. FG-DVC was first adopted to determine the composition and the contents of the volatiles from coal pyrolysis. Then NO reduction was simulated under the stoichiometric ratio of 0.6, 1.0 and 1.2 respectively, by using the volatiles from the pyrolysis calculation. The key steps of NO formation and reduction were put forward by the analysis of sensitivity and the rate of production. The results also indicated that only CH₃, N₂O, NHi, HCN and H₂CN enable to reduce NO to N₂.