Investigation of the chemical and dilution effects of major EGR constituents on the reactivity of PRF by weak flames in a micro flow reactor with a controlled temperature profile

The chemical and dilution effects of the major exhaust gas recirculation constituents N2, CO2 and H2O on the reactivity of iso-octane/air and n-heptane/air mixtures were investigated by separated weak flames in a micro flow reactor with a controlled temperature profile. Experimental results showed that high dilution ratios of 20% and 50% of N2 and CO2 shifted the blue flame (reactions of intermediate species) as well as the hot flame (reactions...