氘化锂粉末与O_2,CO_2和水汽的反应动力学研究

Study of Kinetics of Reaction of Lithium Deuteride Powder With O_2,CO_2 and Water Vapor

研究了28℃下,氘化锂粉末与O2,CO2和水汽的反应动力学。结果表明,氘化锂与O2,CO2的反应很微弱,而与水汽的反应速率相对要大得多。室温下氘化锂与水汽的反应可用收缩未反应芯模型来描述,界面化学反应为二级反应,反应速率常数为0 281kPa-1·min-1。

The kinetics of reaction of lithium deuteride powder with O_2, CO_2 and water vapor is (studied.) The experimental results show that lithium deuteride reacts with O_2 and CO_2 at very small (reaction) rate but with water vapor at comparatively larger rate at room temperature (≈28 ℃). The reaction process with water vapor could be described using the unreacted shrinking core model. The second-order kinetics is appropriate for the chemical reaction on the surface of lithium deuteride and reaction rate constant is 0.281 kPa^(-1)·min^(-1).