Multi-species time-history measurements during n-dodecane oxidation behind reflected shock waves

Concentration time-histories were measured behind reflected shock waves during n-dodecane oxidation for five species: n-dodecane, C2H4, OH, CO2, and H2O. Experiments were conducted at temperatures of 1300–1600 K and pressures near 2 atm using mixtures of 400 ppm n-dodecane and 7400 ppm oxygen (ϕ = 1) in argon. n-Dodecane and ethylene were monitored using IR gas laser absorption at 3.39 and 10.53 μm, respectively; OH was monitored using UV laser absorption at 306.5 nm; and CO2 and H2O were monitored using tunable IR diode laser absorption at 2.7 and 2.5 μm, respectively. These time-histories provide kinetic targets to test and refine large reaction mechanisms for n-dodecane and demonstrate the potential of this type of data for validation of large reaction mechanisms. Comparisons are made with the predictions of two recently developed large-alkane reaction mechanisms, and the need for improved rate measurements of higher alkene reactions is discussed.