A high temperature ethane oxidation model, based on the well-established kinetic model for ethane pyrolysis, has been developed. The reaction model comprises 69 reaction steps with 24 gaseous components. Numerical tests were carried out using experimental ignition delay data from shock tube measurements, where the ignition temperatures and pressures ranged from 1400 to 1800°K and from 0.267 to 0.375 bar, respectively. The following properties of the proposed model are essential. I. Methyl radials (CH 3) are removed by CH a +02 ~ CH30 + 0 CH30 +M ---, H2CO+H +M O + CH 3 ~ H2CO + H. 2.The hydrocarbon radicals C2H 5 and C2H 3 are mainly removed by the pyrolysis steps C2H 5 ~ C2H 4 + H C2H 3 + M --' C2H 2 + H + M.
- During the induction period and with the chosen values of ignition temperature and pressure the reaction process follows branched-chain kinetics.
Within the chosen range of ignition data the variation with temperature of the ignition delays was predicted well by the calculations. When the comparison between calculated and measured ignition delays was extended to high pressures around l0 bar, the agreement was only moderate.