金属Ce在高温蒸汽下的氧化动力学初步研究

Preliminary Study of Oxidation Kinetics of Cerium Under High Temperature Steam

摘要: Ce常用于模拟研究U、Pu等锕系元素的腐蚀行为和转化行为，其在高温水蒸气条件下的氧化动力学目前还未见报道。本研究采用热重分析仪对金属Ce的高温水蒸气氧化动力学开展了研究，得到了动力学曲线，并对反应过程进行了探讨，金属Ce的水蒸气氧化动力学过程呈现明显的三个阶段，反应后主要产物为CeO₂和氢气。

Abstract: Cerium is often used to simulate the corrosion behavior and transformation behavior of actinides such as uranium and plutonium, and its oxidation kinetics in water vapor has not been reported. In this study, the oxidation kinetics of cerium at high temperature in water vapor was studied by means of a thermogravimetric analyzer. The kinetics curve was obtained and the reaction process was discussed. The oxidation kinetics of cerium in water vapor conform to the rule of three-stage oxidation, and the main products after the reaction are CeO₂ and hydrogen.