Kinetic modeling of nitrogen oxides decomposition at flame temperatures

Citation
Aa. Konnov et J. De Ruyck, Kinetic modeling of nitrogen oxides decomposition at flame temperatures, COMB SCI T, 149(1-6), 1999, pp. 53-78
Citations number
66
Categorie Soggetti
Mechanical Engineering
Journal title
COMBUSTION SCIENCE AND TECHNOLOGY
ISSN journal
00102202 → ACNP
Volume
149
Issue
1-6
Year of publication
1999
Pages
53 - 78
Database
ISI
SICI code
0010-2202(1999)149:1-6<53:KMONOD>2.0.ZU;2-5
Abstract
A detailed N/O kinetic mechanism has been developed and tested in compariso n with experimental data for N2O ignition, NO and NO2 decomposition at high temperatures. It consists of 27 reactions among 11 species. A sensitivity analysis reveals which reactions are critical for the quality of the modeli ng in particular experimental conditions. The choice of the rate constants for these reactions is discussed. Good agreement has been obtained for the ignition delays in the pure N2O and its mixtures with Ar, decomposition rat es of the NO and NO2 in static reactors and behind shock waves. The modelin g using recently suggested controversial rate constants for the key reactio ns N2O + O = N-2 + O-2 (8) N2O + O = NO + NO (9) has been performed as well. It is demonstrated that the use of too-low or t oo-high values of the reactions (8,9) rate constants is incompatible with a vailable experimental data.