Towards a kinetic understanding of the NOx sensitization effect on unsaturation hydrocarbons: A case study of ethylene/nitrogen dioxide mixtures

Ignition delay time (IDT) measurements for ethylene (C2H4)/nitrogen dioxide (NO2)/oxygen/argon mixtures with various blending ratios of NO2/C2H4 = 0/100, 15/85 and 50/50 were performed in a shock tube. The sensitization effect of NO2 on C2H4 ignition was investigated at pressures ranging from 1.2 to 10 atm, in the temperature range 920–1780 K, and at equivalence ratios from 0.5 to 2.0. Similar to our recent studies of NO2 effects on CH4 and C2H6...