Measuring the rate constant of the reaction between chlorine atoms and CHF2Br by Cl atom resonance fluorescence

被引：0
|
作者：
I. K. Larin
A. I. Spasskii
E. M. Trofimova
N. G. Proncheva
机构：
[1] Russian Academy of Sciences,Institute of Energy Problems of Chemical Physics
[2] Russian Academy of Sciences,Keldysh Institute of Applied Mathematics
来源：
Kinetics and Catalysis | 2016年 / 57卷
关键词：
chlorine atom; refrigerants; resonance fluorescence; reaction rate constant; fire extinguishing;
D O I：
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学科分类号：
摘要：
The rate constant of the reaction between Cl atoms and CHF2Br has been measured by chlorine atom resonance fluorescence in a flow reactor at temperatures of 295–368 K and a pressure of ~1.5 Torr. Lining the inner surface of the reactor with F-32L fluoroplastic makes the rate of the heterogeneous loss of chlorine atoms very low (khet ≤ 5 s–1). The rate constant of the reaction is given by the formula k = (4.23 ± 0.13) × 10–12e(–15.56 ± 1.58)/RT cm3 molecule–1 s–1 (with the activation energy in kJ/mol units). The possible role of this reaction in the extinguishing of fires producing high concentrations of chlorine atoms is discussed.
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页码：308 / 312
页数：4
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