A shock tube study of the recombination of carbon monoxide and oxygen atoms
A shock tube study of the recombination of carbon monoxide and oxygen atoms
复制标题
一氧化碳和氧原子重组的激波管研究
DOI：
10.1063/1.433982
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发表时间：
1976
影响因子：
4.4
通讯作者：
D. Steiner
中科院分区：
文献类型：
--
作者：
A. Dean;D. Steiner
在各种N2 O/CO/Ar混合物中监测了CO2的时间分辨发射以及CO和O的辐射复合（火焰带发射）。在2100-3200 K之间的温度和2.5-7.7×1018分子/cm 3之间的总浓度下，这些混合物在反射冲击波之后进行了研究。对火焰带检测器进行校准，以便确定原子氧的绝对浓度。这些数据被证明符合以下机理：N2 O +M=N2+O+M（I），N2 O +O=2NO（II），N2 O + O=N2+O2（III），kI=4.5×10−10 exp（− 226 kJ/RT）cm 3 molecule−1 μ s−1，k2=k3 =7.7×10−11 exp（− 117 kJ/RT）。该组合也显示与该实验室的早期数据一致。在这些实验中，观察到CO2随时间线性增加，并且测量了定义为kapp dCO 2/dt/（[CO] [O] [M]）的表观复合速率常数，发现其是压力的函数。这一行为归因于存在非常小浓度的含氢杂质。
Time resolved emissions from CO2 and the radiative recombination of CO and O (flame‐band emission) have been monitored in a variety of N2O/CO/Ar mixtures. These mixtures were studied behind reflected shock waves at temperatures between 2100–3200 K and total concentrations between 2.5–7.7×1018 molecule/cm3. The flame‐band detector was calibrated so that absolute concentrations of atomic oxygen could be determined. These data were shown to be consistent with the following mechanism: N2O+M=N2+O+M (I), N2O+O=2NO (II), N2O+O=N2+O2 (III), with kI=4.5×10−10 exp(−226kJ/RT) cm3 molecule−1⋅ s−1 and k2=k3 =7.7×10−11 exp(−117kJ/RT). This combination was also shown to be consistent with earlier data from this laboratory. CO2 was observed to increase linearly with time in these experiments, and an apparent recombination rate constant defined as kapp≡dCO2/dt/([CO] [O] [M]) was measured and found to be a function of pressure. This behavior was attributed to the presence of very small concentrations of hydrogenous impurit...