Bedjanian Yuri
Institut de Combustion, Aérothermique, Réactivité et Environnement (ICARE), CNRS, 45071 Orléans Cedex 2, France.
J Phys Chem A. 2020 Apr 9;124(14):2863-2870. doi: 10.1021/acs.jpca.0c00429. Epub 2020 Mar 27.
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 = 250-830 K and as a function of pressure at = 301 K in the pressure range 1.0-10.4 Torr. The rate constant of the reaction OH + CHC(O)CHOH → products (1) was measured using both absolute (from the kinetics of OH consumption in excess of hydroxyacetone) and relative rate methods ( = 4.7 × 10 × exp (1410/) cm molecule s at = 250-830 K). The present data combined with selected previous temperature-dependent studies of reaction (1) yield = 4.4 × 10 × exp (1110/) cm molecule s, which is recommended from the present work at = 230-830 K (with conservative uncertainty of 20% at all temperatures). was found to be independent of the pressure in the range from 1.0 to 10.4 Torr of He at = 301 K. The present results are compared with previous experimental and theoretical data.
在总压力为2.0 - 2.1托的氦气环境下，研究了羟基丙酮与羟基自由基反应的动力学随温度的变化，温度范围为250 - 830 K；同时，在301 K温度下，研究了该反应的动力学随压力的变化，压力范围为1.0 - 10.4托。反应OH + CHC(O)CHOH → 产物(1)的速率常数通过绝对方法（从羟基丙酮过量时羟基自由基消耗的动力学）和相对速率方法进行测量（在250 - 830 K时，速率常数为4.7 × 10 × exp(1410/T) cm³ molecule⁻¹ s⁻¹）。将本研究数据与先前对反应(1)的部分温度相关研究相结合，得到速率常数为4.4 × 10 × exp(1110/T) cm³ molecule⁻¹ s⁻¹，本研究推荐在230 - 830 K温度范围内使用该值（所有温度下保守不确定度为20%）。在301 K时，发现该速率常数在1.0至10.4托的氦气压力范围内与压力无关。将本研究结果与先前的实验和理论数据进行了比较。
