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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Temperature-Dependent Kinetic Study of the Reaction of Hydroxyl Radicals with Hydroxyacetone
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Temperature-Dependent Kinetic Study of the Reaction of Hydroxyl Radicals with Hydroxyacetone

机译：羟基丙酮羟基自由基反应的温度依赖性动力学研究

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摘要

The kinetics of the reaction of OH radicals with hydroxyacetone has been investigated as a function of temperature at a total pressure of helium of 2.0-2.1 Torr and over an extended temperature range of T = 250-830 K and as a function of pressure at T = 301 K in the pressure range 1.0-10.4 Torr. The rate constant of the reaction OH + CH3C(O)CH2OH -> products (1) was measured using both absolute (from the kinetics of OH consumption in excess of hydroxyacetone) and relative rate methods (k(1) = 4.7 x 10(-22) x T-3.25 exp (1410/T) cm(3) molecule(-1) s(-1) at T = 250-830 K). The present data combined with selected previous temperature-dependent studies of reaction (1) yield k(1) = 4.4 x 10(-20) x T-2.63 exp (1110/T) cm(3) molecule(-1) s(-1), which is recommended from the present work at T = 230-830 K (with conservative uncertainty of 20% at all temperatures). k(1) was found to be independent of the pressure in the range from 1.0 to 10.4 Torr of He at T = 301 K. The present results are compared with previous experimental and theoretical data.
机译：在2.0-2.1托的氦气的总压力下，研究了OH基团与羟基丙酮的反应的动力学作为温度的函数，并且在T = 250-830k的延长温度范围内，以及T处的压力= 301 k在压力范围1.0-10.4托。使用绝对的（来自过量羟基丙酮的OH消耗的动力学）和相对速率方法（K（1）= 4.7×10（K（1）= 4.7×10（K（1）= 4.7×10（K（1）= 4.7×10（ -22）X T-3.25 Exp（1410 / T）cm（3）分子（-1）分子（-1）s（-1）在t = 250-830 k）。本数据与选定先前的反应温度依赖性研究相结合（1），产量K（1）= 4.4×10（-20）×T-2.63 exp（1110 / T）cm（3）分子（-1）S（ -1），推荐在T = 230-830 k（在所有温度下的保守不确定性为20％）。发现K（1）与T = 301k的1.0至10.4托的压力无关。与先前的实验和理论数据相比，本结果与先前的实验和理论数据相比。

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