The conversion of fuel nitrogen through HCN and NH3 to nitrogen oxides
(N2O, NO and NO2) was studied using an entrained-flow reactor at 800-
degrees-C with one coal and four peats at 5 and 1% 02. The O/N ratios
of the fuels were between 7 and 20. A clear dependence was found betwe
en the HCN/NH3 ratio measured just after the vigorous pyrolysis step a
nd the N2O/NO ratio in the flue gas when these were plotted as a funct
ion of the initial O/N ratio of the fuel.