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Rate Coefficients for the Reactions of OH and OD with HCl and DCl between 200 and 400 K

机译:OH和OD与HCl和DCl在200至400 K之间反应的速率系数

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Rate coefficients for the reaction of OH radical with HCl(k_1) between 200 and 400 K, were measured to be 3.28 * 10~(-17) T~(1.66) exp[184/T] cm~3 molecule~(-1)s~(-1) by producing OH via pulsed laser photolysis and detecting it via laser induced fluorescence. The rate coefficients for the reactions of OH with DCl (k_2), OD with HCl (k_3), and OD with DCl (k_4) were also measured using the same method to be k_2 = 2.9 * 10~(-12) exp[-728/T], k_3 = 8.1 * 10~(-18)T~(1.85) exp[300/T], and k_4 = 2.5 * 10~(-12) exp[-660/T], k_3 = 1.01 * 10~(-16)T~(1.4) exp[309/T], and k_4 = 1.64 * 10~(-19) T~(2.27) exp[385/T] cm~3 molecule~(-1)s~(-1), in reasonable agreement with experiments. They were also used to analyze the origin of the isotope effects. A two-dimensional chemical transport model calculation shows that our measured higher values of k_1 at low temperatures do not significantly alter the calculated ozone abundance, or its trend, in the stratosphere.
机译:在200至400 K之间,OH自由基与HCl(k_1)反应的速率系数经测量为3.28 * 10〜(-17)T〜(1.66)exp [184 / T] cm〜3分子〜(-1 s〜(-1)通过脉冲激光光解产生OH并通过激光诱导的荧光进行检测。 OH与DCl(k_2),OD与HCl(k_3)和OD与DCl(k_4)反应的速率系数也使用相同的方法测量,即k_2 = 2.9 * 10〜(-12)exp [- 728 / T],k_3 = 8.1 * 10〜(-18)T〜(1.85)exp [300 / T],k_4 = 2.5 * 10〜(-12)exp [-660 / T],k_3 = 1.01 * 10〜(-16)T〜(1.4)exp [309 / T],k_4 = 1.64 * 10〜(-19)T〜(2.27)exp [385 / T] cm〜3分子〜(-1)s 〜(-1),与实验合理吻合。它们还被用来分析同位素效应的起源。二维化学迁移模型计算表明,我们在低温下测得的k_1较高的值不会显着改变平流层中计算的臭氧丰度或其趋势。

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