Kinetics Study of OH Radical Reactions with n-Octane, n-Nonane, and n-Decane at 240-340 K Using the Relative Rate/Discharge Flow/Mass Spectrometry Technique
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- 作者：Zhuangjie Li ; Sumitpal Singh ; William Woodward ; Lan Dang
- 刊名：Journal of Physical Chemistry A
- 出版年：2006
- 出版时间：November 9, 2006
- 年：2006
- 卷：110
- 期：44
- 页码：12150 - 12157
- 全文大小：150K
- 年卷期：v.110,no.44(November 9, 2006)
- ISSN：1520-5215
文摘
The kinetics of the reactions of hydroxyl radical with n-octane (k1), n-nonane (k2), and n-decane (k3) at 240-340 K and a total pressure of ~1 Torr has been studied using relative rate combined with discharge flow andmass spectrometer (RR/DF/MS) technique. The rate constant for these reactions was found to be positivelydependent on temperature, with an Arrhenius expression of k1 = (2.27 ± 0.21) × 10-11exp[(-296 ± 27)/T],k2 = (4.35 ± 0.49) × 10-11exp[(-411 ± 32)/T], and k3 = (2.26 ± 0.28) × 10-11exp[(-160 ± 36)/T] cm3molecule-1 s-1 (uncertainties taken as 2
hars/sigma.gif" BORDER=0 >), respectively. Our results are in good agreement with previousstudies at and above room temperature using different techniques. Assuming that the reaction of alkane withhydroxyl radical is the predominant form for loss of these alkanes in the troposphere, the atmospheric lifetimefor n-octane, n-nonane, and n-decane is estimated to be about 43, 35, and 28 h, respectively.
hars/sigma.gif" BORDER=0 >), respectively. Our results are in good agreement with previousstudies at and above room temperature using different techniques. Assuming that the reaction of alkane withhydroxyl radical is the predominant form for loss of these alkanes in the troposphere, the atmospheric lifetimefor n-octane, n-nonane, and n-decane is estimated to be about 43, 35, and 28 h, respectively.