Kinetic study of the hydrogel + hydrogen reaction from 800 to 1550 K
Kinetic study of the hydrogel + hydrogen reaction from 800 to 1550 K
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800至1550 K水凝胶氢反应的动力学研究
DOI：
10.1021/j100200a041
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
K. R. Winn
中科院分区：
文献类型：
--
作者：
R. Oldenborg;G. Loge;D. Harradine;K. R. Winn
在 800-1550K 温度范围内完成了双分子反应 OH + H{sub 2} {r_arrow} H + H{sub 2}O 速率常数的直接测量。在这些实验中，少量的水蒸气被准分子激光光解，瞬间产生 OH 自由基和 H 原子。通过使用激光诱导荧光来监测 OH 自由基的后续时间历史。分析 OH 去除速率与添加的氢气的函数关系，得出上述反应的速率常数。这些测量的温度范围弥补了 Michael 和 Sutherland 最近的激波管数据 (1246-2581 K) 之间的差距；弗兰克和贾斯特； Davidson、Chang 和 Hanson 以及 Tully、Ravishankara 和同事的石英池闪光光解数据 (250-1050 K)。这些数据与重叠区域中先前的数据集非常一致。通过将作者的数据与这四个数据集相结合，作者得出了一个新的速率常数表达式。 1 = (3.56 x 10{sup {minus}16})T{sup 1.52} exp[-1736/T] cm{sup 3} molecular{sup {minus}1} s{sup {minus}1}，适用于温度范围 250-2581 K。 18 条参考文献，3 个图，1 个选项卡。
Direct measurements of the rate constant for the bimolecular reaction OH + H{sub 2} {r_arrow} H + H{sub 2}O have been completed in the temperature range 800-1550K. In these experiments, small amounts of water vapor were photolyzed with an excimer laser to {open_quotes}instantaneously{close_quotes} create OH radicals and H atoms. The subsequent time history of the OH radicals was monitored by using laser-induced fluorescence. Analysis of the OH removal rate as a function of added hydrogen yielded the rate constant for the above reaction. The temperature range of these measurements bridges the gap between the recent shock tube data (1246-2581 K) of Michael and Sutherland; Frank and Just; Davidson, Chang, and Hanson and the quartz cell flash photolysis data (250-1050 K) of Tully, Ravishankara, and co-workers. These data are in very good agreement with previous data sets in the overlap region. By combining the author`s data with these four data sets, the authors derive a new rate constant expression. 1 = (3.56 x 10{sup {minus}16})T{sup 1.52} exp[-1736/T] cm{sup 3} molecule{sup {minus}1} s{sup {minus}1}, that is applicable in the temperature range 250-2581 K. 18 refs., 3 figs., 1 tab.