Kinetic study of OH radical reaction with n-heptane and n-hexane at 240–340K using the relative rate/discharge flow/mass spectrometry (RR/DF/MS) technique
✍ Scribed by Mary A. Crawford; Bao Dang; John Hoang; Zhuangjie Li
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 211 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0538-8066
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✦ Synopsis
Abstract
The kinetics of reactions of OH radical with n‐heptane and n‐hexane over a temperature range of 240–340K has been investigated using the relative rate combined with discharge flow/mass spectrometry (RR/DF/MS) technique. The rate constant for the reaction of OH radical with n‐heptane was measured with both n‐octane and n‐nonane as references. At 298K, these rate constants were determined to be k~1, octane~ = (6.68 ± 0.48) × 10^−12^ cm^3^ molecule^−1^ s^−1^ and k~1, nonane~ = (6.64 ± 1.36) × 10^−12^ cm^3^ molecule^−1^ s^−1^, respectively, which are in very good agreement with the literature values. The rate constant for reaction of n‐hexane with the OH radical was determined to be k~2~ = (4.95 ± 0.40) × 10^−12^ cm^3^ molecule^−1^ s^−1^ at 298K using n‐heptane as a reference. The Arrhenius expression for these chemical reactions have been determined to be k~1, octane~ = (2.25 ± 0.21) × 10^−11^ exp[(−293 ± 37)/T] and k~2~ = (2.43 ± 0.52) × 10^−11^ exp[(−481.2 ± 60)/T], respectively. © 2011 Wiley Periodicals, Inc. Int J Chem Kinet 43: 489–497, 2011