The kinetics and mechanism of the uranium-water vapour reaction — an evaluation of some published work
The kinetics and mechanism of the uranium-water vapour reaction — an evaluation of some published work
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铀-水蒸气反应的动力学和机理——对一些已发表作品的评估
DOI：
10.1016/0022-3115(84)90052-7
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发表时间：
1984
影响因子：
3.1
通讯作者：
A. Ritchie
中科院分区：
文献类型：
--
作者：
A. Ritchie
Grimes和Morris发表的关于铀-水蒸气反应速率的结果是用干涉测量法得到的，已用从文献中得到的铀和二氧化铀复折射率的最佳值（铀为3.1-3.91，二氧化铀为2.2-0.51）重新计算过。反应动力学可用Haycock模型描述，线性速率常数K1 = 1.3× 104 P12 H2Oexp（− 9.0 kcal/RT）mg U/cm 2 h，其中PH 2 O为单位为水蒸气压，或K 1= 3.48× 10 8 r 1 2 exp（− 14.1 kcal/RT）mg U/cm 2 h，其中r是相对湿度分数，R是气体常数，T是绝对温度。一种机制，它占所观察到的铀-水蒸气反应的速度对水蒸气压力的平方根的依赖性。
The published results of Grimes and Morris on the rate of the uranium-water vapour reaction which were obtained using interferometry have been recalculated using the best values derived from the literature for the complex refractive indices of uranium and uranium dioxide (3.1–3.91 for uranium and 2.2-0.51 for uranium dioxide). The kinetics have been described by Haycock's model and the linear rate constant is given by K 1= 1.3× 10 4 P 1 2 H 2 O exp (− 9.0 kcal/RT) mg U/cm 2 h, where P H 2 O is the water vapour pressure in torr or K 1= 3.48× 10 8 r 1 2 exp (− 14.1 kcal/RT) mg U/cm 2 h, where r is the fractional relative humidity, R is the gas constant and T is the absolute temperature. A mechanism is described which accounts for the observed dependence of the rate of uranium-water vapour reaction on the square root of the water vapour pressure.