Formation of NO during the low-temperature combustion of H₂O/CH₄/Air mixtures containing H₂O₂ or O₃

The effect of H₂O₂ and O₃ on the ignition delay of the stoichiometric H₂O/Air/CH₄ mixture and on the formation of NO is studied. It is determined that the replacement of H₂O₂ by O₃ in the H₂O /Air/ CH₄ mixture does not affect the NO yield. At the same time, according to the results of calculations, the yield of NO decreases at lower temperatures of the initial mixture (T₀). Thus, the value T₀ = 650 K can be achieved in the case of using the mixtures containing 0.01 mf of O₃. In this case, the NO concentration calculated at the combustion chamber outlet reaches values of 6–7 ppm. The results also assume that there is a possibility of further reduction in temperature of initial mixture and concentration of NO at the exit of the burner.