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ISSN Печать: 2150-766X
ISSN Онлайн: 2150-7678
Indexed in
MODELING OF SELF-IGNITION, STRUCTURE, AND VELOCITY OF PROPAGATION OF THE FLAME OF HYDROGEN AZIDE
Краткое описание
A kinetic mechanism of thermal decomposition of hydrogen azide (HN3) has been developed. The mechanism adequately describes experimental data on the self-ignition of HN3 and propagation velocity of HN3 flames available in the literature. The mechanism includes 60 reactions with 15 participating species (He, H2, H, N, NH, NH2, NNH, NH3, HN3, N3, N2, Ar, N2H2, N2H3, and N2H4). For the total pressure of 50 Torr of mixtures of HN3 with different diluents (N2, Ar, and He), self-ignition limits of HN3 and flame speeds were calculated using the developed mechanism. The results of modeling of the flame structure of the HN3/N2 and the HN3/Ar mixtures demonstrated that, with the HN3 concentration in the 50−100% range, the maximum temperatures in the flame front exceed thermodynamic equilibrium values by 140−610 K; i.e., super-adiabatic flame temperatures are reached. The developed mechanism can be used for modeling combustion and thermal decomposition in chemical systems containing hydrogen azide.
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Knyazev Vadim D., Kinetics of three reactions involving the azide radical: H + HN3, thermal decomposition of N3, and N3 + HN3, Chemical Physics Letters, 771, 2021. Crossref