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• W2077709392 abstract "The auto-ignition delay times τi of 1-C6H12/O2/Ar mixtures have been measured between 1270 and 1700 K using shock tube technique for 3 equivalence ratios (Φ = 0.5, 1, and 1.5) at a pressure of about 0.2 MPa. At higher temperatures (>1400 K), the logarithm of τi varies linearly as a function of the temperature inverse for a given value of equivalence ratio. The apparent activation energy, Ea, is approximately equal to 230 kJ mol−1. At lower temperature (<1400 K), Ea strongly decreases and becomes equal to about 120 kJ mol−1 around 1300 K. A correlation between τi, reactant concentrations, and temperature behind reflected shock waves was proposed for each temperature range. These correlations give an estimation of τi with an accuracy better than 12%. A detailed chemical mechanism of the 1-hexene oxidation has been developed with the “EXGAS” program. The agreement between computed and measured values of τi was correct at high temperatures (>1400 K). The major channels of the chemical species fluxes have been discussed: at low temperatures, 1-hexene is mainly consumed by retro-ene reaction to give propene and, in a smaller ratio, by unimolecular decomposition to give allyl and 1-propyl radicals. At high temperature, unimolecular decomposition becomes more important than retro-ene reaction. The change in Ea below 1400 K is not explained by the model. The auto-ignition delay times of 1-hexene have been compared to those of other unsaturated hydrocarbons. For stoichiometric mixtures diluted by 99 mol% of argon at a pressure of 200 kPa, the shortest delays were obtained for 1-octene while the longest delays were obtained for propene. With iso-butene and ethylene, the delay times are closer to 1-hexene in the low temperature side and to propene in the high temperature one." @default.
• W2077709392 created "2016-06-24" @default.
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• W2077709392 date "2005-01-01" @default.
• W2077709392 modified "2023-10-01" @default.
• W2077709392 title "Experimental and modeling study of 1-hexene oxidation behind reflected shock waves" @default.
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• W2077709392 doi "https://doi.org/10.1016/j.proci.2004.08.070" @default.
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