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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Shock Tube Study on the Thermal Decomposition of Fluoroethane Using Infrared Laser Absorption Detection of Hydrogen Fluoride
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Shock Tube Study on the Thermal Decomposition of Fluoroethane Using Infrared Laser Absorption Detection of Hydrogen Fluoride

机译：红外光吸收法检测氟化氢中氟乙烷热分解的激波管研究

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摘要

Motivated by recent shock tube studies on the thermal unimolecular decomposition of fluoroethanes, in which unusual trends have been reported for collisional energy-transfer parameters, the rate constants for the thermal decomposition of fluoroethane were investigated using a shock tube/laser absorption spectroscopy technique. The rate constants were measured behind reflected shock waves by monitoring the formation of HF by IR absorption at the R(1) transition in the fundamental vibrational band near 2476 nm using a distributed-feedback diode laser. The peak absorption cross sections of this absorption line have also been determined and parametrized using the Rautian?Sobel’man line shape function. The rate constant measurements covered a wide temperature range of 1018?1710 K at pressures from 100 to 290 kPa, and the derived rate constants were successfully reproduced by the master equation calculation with an average downward energy transfer, <ΔE_(down)>, of 400 cm~(?1).
机译：受近期关于氟乙烷热单分子分解的激波管研究的推动，其中已报道了碰撞能量传递参数的异常趋势，因此使用激波管/激光吸收光谱技术研究了氟乙烷热分解的速率常数。通过使用分布反馈二极管激光器在2476 nm附近的基本振动带中的R（1）过渡处通过IR吸收监测HF的吸收，来测量反射冲击波后面的速率常数。还使用Rautian？Sobel’man线形函数确定了该吸收线的峰吸收截面并进行了参数化。速率常数测量在100至290 kPa的压力下覆盖了1018？1710 K的宽温度范围，并且通过主方程计算成功地重现了导出的速率常数，平均向下能量传递<ΔE_（down）>为400厘米〜（？1）。

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