Study on the chemical kinetic mechanisms of ethane ignition

Ignition delay times of ethane were measured behind reflected shock waves under different pressures, temperatures, and equivalence ratios. Simulations and chemical kinetic analysis on the ignition process of the mixtures were carried out using CHEMKIN II package with GRIMech 3.0 mechanismThe simulation results showed large scatters with the experimental data especially at lean mixtures. Reaction C₂H₅+O₂=C₂H₄+HO₂ and reaction C₂H₄+H+M=C₂H₅+Mwere found to havesignificantinfluenceon the ignition process of ethane, and their rate constants were modified in order to give more accurate prediction. The optimized mechanism can give better prediction of ignition delay times of ethane and maintains its good prediction onthe laminar flame speed.