Experimental and kinetic research on ignition characteristics of C₂H₆/H₂ mixtures

Ignition delay times of stoichiometric C₂H₆/H₂/O₂/Ar mixtures were measured by high-pressure shock tube faculty. The temperature is set from 900 to 1 700 K, the pressure from 1.2 to 16.0 atm., and the ethane blending ratio from 0% to 100%. The experiments show that for x_C2H6>30%, ignition delay time shows a typical Arrhenius dependence on temperature and pressure. For 3%≤x_C2H6<30%, the ignition delay time presents a typical Arrhenius dependence on temperature and the higher pressure the higher ignition activation energy. For x_C2H6≤3%, the ignition delay time complicatedly depends on temperature and pressure. The ethane blending ratio exerts a non-linear effect on ignition delay time of C₂H₆/H₂ mixtures and NUIG Aramco Mech 1.3 well predicts the experimental data. The ignition delay time dependence on x_C2H6 is explained by reaction pathway analysis and normalized H radical consumption analysis.