阐明通过NO2卷氧化生产的氧化粉的组成和结构
Kathryn M Peruski1, Tyler L Spano1, Matthew C Vick1
1Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, Tennessee 37830, USA.
ACS omega
|March 11, 2024
概括
伏氧化利用二氧化 (NO2) 气体重新处理废核燃料. 这项研究发现,粉末水化对于在卷氧化过程中形成乌兰酸盐至关重要.
科学领域:
- 核化学 核化学 核化学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 伏氧化是一种有前途的废核燃料再加工方法.
- 它旨在最大限度地减少浪费,并使用气体固体反应回收活性化物.
- 了解NO2气体反应化学对于工艺开发至关重要.
研究的目的:
- 在卷氧化过程中分析中间固体相.
- 为了验证拟议的二氧化 (NO2) 氧化反应机制.
- 为了研究粉末水化在酸的形成中的作用.
主要方法:
- 粉末X射线衍射和拉曼光谱用于相位识别.
- 扫描电子显微镜用于粉末形态学和微观结构分析.
- 对二氧化 (UO2) 对NO2气体和蒸汽的受控暴露.
主要成果:
- 2的初始氧化产生了-三氧化物 (ε-UO3).
- 直接暴露于NO2并没有像预期的那样产生甲酸.
- 在蒸汽水化后检测到乌兰酸六酸盐,随后暴露于NO2.
结论:
- 表面的水分显著影响了氧化过程中酸的形成.
- 氧化物转化为酸盐的动力学需要进一步研究.
- 这些发现将为未来的氧化过程设计和化学工程决策提供信息.
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