A KINETIC-MODEL FOR THE REDUCTION OF NITRIC-OXIDE BY HYDRAZINE

A chemical kinetic model is developed for the non-catalytic reduction of nitric oxide (NO) by hydrazine(N2H4). Since the reduction of NO was observed in an experimental reaction with N2H4, the hydrazine has bee n suggested as a new reductant of NO in addition to the conventional a mmonia, urea and isocyanic acid. In the proposed kinetic model, a set of fifty one chemical reactions that includes the various branching re actions of N2H4 to NH2 and the well-known reaction NO + NH2 --> N-2 H2O is simultaneously considered with the usual partial equilibrium as sumptions. The NO reduction is estimated to occur at a temperature ran ge between 700 K and 1400 K, which is wider and lower than in the conv entional Thermal DeNOx process. The, maximum amount of the reduced NO is slightly less than that in the Thermal. DeNOx. The effects of the o ther input parameters on the Ne) reduction rare are also discussed.