在批处理过程中实时自动化pH控制,依靠拉曼pH测量
Thomas Serrano1, Alyssa F Espley1, Savannah M Potter1
1Pacific Northwest National Laboratory, Richland, Washington 99352, United States.
ACS omega
|May 19, 2025
概括
拉曼光谱为核燃料回收中的实时pH监测提供了一种可靠的方法. 这种持久的技术,加上化学测量,通过保持精确的pH值水平来优化分离过程,优于传统探针.
科学领域:
- 核化学和材料科学 核化学和材料科学
- 分析化学是一种分析化学.
- 工艺控制工程 工艺控制工程
背景情况:
- 核裂变提供低碳能源,但需要有效管理使用的核燃料.
- 从使用过的燃料中回收有价值的组件需要对溶液pH敏感的化学处理.
- 传统的pH探头不适合在恶劣的核燃料加工环境中使用.
研究的目的:
- 为了证明拉曼光谱作为核燃料再加工的强大,实时pH监测工具.
- 将拉曼光谱与化学测量和工业控制系统集成为自动化pH管理.
- 通过保持关键的pH值范围来优化TALSPEAK提取过程.
主要方法:
- 利用拉曼光谱技术在现场实时监测溶液的pH值.
- 采用化学测量分析来开发一个可预测的pH模型.
- 集成光谱和建模与可编程逻辑控制器用于自动化过程控制.
- 扰乱了溶液,并观察到系统自动恢复到目标pH值的能力.
主要成果:
- 拉曼光谱学准确地跟踪和预测碳酸盐缓冲系统中的pH值.
- 自动控制系统成功地使溶液的pH值保持在TALSPEAK提取的最佳范围 (2.8 ± 0.1) 内.
- 基于拉曼的pH测量显示出与电化学探针的良好一致.
- 平方根误差证实了拉曼光谱在自动pH校正方面的可靠性.
结论:
- 拉曼光谱,通过化学测量增强,为核燃料加工的传统pH探针提供了耐用和准确的替代方案.
- 这种综合方法可以实时控制和优化关键化学分离.
- 该技术展示了用于提高废核燃料管理效率和安全的务实应用.
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