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Kinetic Study of the Temperature Dependence of OH-Initiated Oxidation of n-Dodecane

机译:N-十二烷氧化氧化温度依赖性的动力学研究

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Reaction rate constants for the reaction of n-dodecane with hydroxyl radicals were measured as a function of temperature between 283 and 303 K, using the relative rate method in the CESAM chamber (French acronym for "experimental multiphasic atmospheric simulation chamber"). The rate constants obtained at 283, 293, and 303 K are (1.27 +/- 0.31) x 10(-11), (1.33 +/- 0.34) x 10(-11), and (1.27 +/- 0.40) x 10(-11) cm(3) molecule(-1) s(-1), respectively. Rate constants measured were in excellent agreement with the few available data in the literature over the studied temperature range (283-340 K). Rate constants estimated by the structure-activity relationship and transition state theory methods agreed with our experimental data within 14%. From these data combined with previous literature measurement, the following Arrhenius expression, k(DDC+OH) = (9.77 +/- 6.19) x 10(-11) x exp[(-595 +/- 5580)/T] cm(3) molecule(-1) s(-1), was found to be valid over a temperature range (283-340 K) of the tropospheric interest.
机译:用CESAM室中的相对速率方法(法式缩写为“实验多相大气仿真室”的相对速率方法,测量N-十二烷与羟基反应的反应速率常数以283和303k的函数测量。在283,293和303k处获得的速率常数是(1.27 +/- 0.31)×10(-11),(1.33 +/- 0.34)×10(-11),和(1.27 +/- 0.40)x分别为10(-11)厘米(3)分子(-1)S(-1)。测量的速率常数与学习温度范围(283-340 k)的文献中的少数可用数据一致。通过结构 - 活动关系和转换状态理论方法估计的速率常数与我们的实验数据同意在14%以内。从这些数据结合先前的文献测量,以下Arrhenius表达,K(DDC + OH)=(9.77 +/- 6.19)x 10(-11)x Exp [( - 595 +/- 5580)/ t] cm( 3)分子(-1)S(-1),发现对流层兴趣的温度范围(283-340 k)有效。

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