对在化物融盐中的电沉积的研究
Pei Wu1, Liqin Wang1, Jinrui Wang1
1China Nuclear Power Engineering Co., Ltd. Beijing 100840 People's Republic of China 13671212490@163.com.
RSC advances
|February 28, 2024
概括
这项研究利用电沉积方法从废核燃料中回收二氧化 (UO2). 优化条件实现了97%的回收效率和稀土元素的有效净化.
科学领域:
- 核工程 核工程是指核工程.
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 废核燃料的再加工对于可持续的核能至关重要.
- 从氧化物废燃料中有效回收二氧化 (UO2) 提出了重大挑战.
研究的目的:
- 开发和优化一种用于从氧化物废燃料中回收UO2的电沉积方法.
- 调查各种参数对UO2回收效率和产品纯度的影响.
- 评估开发系统对特定元素的净化能力.
主要方法:
- 氧化物废燃料 (U3O8) 被化并溶解在盐中 (NaCl-2CsCl与NH4Cl).
- 使用三电极系统进行电极沉积,使用不同的阴极材料/直径,温度,时间,电压和度.
- 产品表征涉及X射线衍射 (XRD),扫描电子显微镜与能量分散光谱 (SEM-EDS),感应合等离子原子发射光谱 (ICP-AES) 和X射线光电子光谱 (XPS).
主要成果:
- 优化的电沉积条件产生了纯净的UO2,回收效率为97%.
- 阴极直径的增加,电解时间和降低电压对恢复效率产生了积极的影响.
- 用 (La) 和 (Nd) 进行兴奋剂显示出显著的净化效应,La的脱污因子为119,Nd的脱污因子为57.
结论:
- 电子沉积是一种有效的方法,可以从氧化物废燃料中有效地回收UO2.
- 参数优化是最大限度地提高回收效率和实现高纯度产品的关键.
- 开发的盐系统显示出在再加工过程中选择性去除特定杂质的前景.
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