Shock-tube study of the ignition of methane/ethane/hydrogen mixtures with hydrogen contents from 0% to 100% at different pressures

The comparison of the measurements to MPFR-CHEMKIN II simulations with different mechanisms shows that the predictions of all tested mechanisms with the exception of the GRI3.0 agree well with the experimental values for reference gas, 40% hydrogen/60% reference gas and partly for 80% hydrogen/20% reference gas and 100% hydrogen. None of the mechanisms can represent the observed reduction of the activation energy at low temperatures of pure hydrogen and of 80% hydrogen/20% reference gas at p ⩾ 4 bar. The literature mechanisms which were developed for H2 or for mixtures with a dominating H2 subsystem cannot predict the observed reduction of the activation energies, either.