Rate constants at room temperature (293 ± 2 K) and atmospheric pressure for the reaction of methyl n-propyl ether (MnPE), CH₃OCH₂CH₂CH₃, with OH and NO₃ radicals and the Cl atom have been determined in a 100 L FEP-Teflon reaction chamber in conjunction with gas chromatography-flame ionization detector (GC-FID) as the detection technique. The obtained rate constants k (in units of cm³ molecule^–1 s^–1) are (9.91 ± 2.30) × 10^–12, (1.67 ± 0.32) × 10^–15, and (2.52 ± 0.14) × 10^–10 for reactions with OH, NO₃, and Cl, respectively. The products of these reactions were investigated by gas chromatography-mass spectrometry (GC-MS), and formation mechanisms are proposed for the observed reaction products. Atmospheric lifetimes of the studied ether, calculated from rate constants of the different reactions, reveal that the dominant loss process for MnPE is its reaction with OH, while in coastal areas and in the marine boundary layer, MnPE loss by Cl reaction is also important.

中文翻译：

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甲基正丙基醚与OH，NO ₃和Cl的气相反应：动力学和机理

甲基正丙基醚（MnPE），CH ₃ OCH ₂ CH ₂ CH ₃与OH和NO ₃自由基以及Cl原子的反应在室温（293±2 K）和大气压下的速率常数已经确定。 100 L FEP-Teflon反应室与气相色谱-火焰电离检测器（GC-FID）结合作为检测技术。将所得到的速率常数ķ（以cm为单位³分子^-1小号^-1）为（9.91±2.30）×10 ^-12，（1.67±0.32）×10 ^-15，和（2.52±0.14）×10 ^-10为与OH，NO反应分别为₃和Cl。通过气相色谱-质谱法（GC-MS）研究了这些反应的产物，并提出了观察到的反应产物的形成机理。根据不同反应的速率常数计算得出的醚的大气寿命表明，MnPE的主要损失过程是其与OH的反应，而在沿海地区和海洋边界层中，Cl反应引起的MnPE损失也很重要。