高纯度MoO3的单步高效回收,通过用水蒸气增强的升华工艺从废用水解硫催化剂中回收
Shuo Liu1, Haoran Yu1, Ali Yaras2
1School of Environmental Science and Engineering, Changzhou University, Changzhou 213164, PR China.
Journal of hazardous materials
|February 5, 2025
概括
这项研究引入了一种新的水蒸气辅助升华方法,用于从已耗尽的水解硫 (HDS) 催化剂中回收三氧化 (MoO3). 这种环保工艺可实现高MoO3回收和纯度,降低成本和零废水.
科学领域:
- 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.
- 环境科学 环境科学
背景情况:
- 消耗水解硫 (HDS) 催化剂是有价值的二次 (Mo) 来源.
- 传统的金炼和Mo回收的水金属炼是能源密集型的,并产生大量的污染.
- 需要可持续和高效的回收方法来回收耗尽的催化剂中的Mo.
研究的目的:
- 开发一种创新的,环保的技术,从废弃的HDS催化剂中回收三氧化 (MoO3).
- 调查水蒸气对升华过程和MoO3回收效率的影响.
- 评估拟议方法的经济可行性和环境影响.
主要方法:
- 使用已耗尽的HDS催化剂,采用了高温升华工艺.
- 研究了水蒸气大气在1100°C下2.5小时的影响.
- 密度函数理论 (DFT) 的计算被用来阐明MoO3升华增强的机制.
- 进行了经济分析,将拟议的方法与现有技术进行比较.
主要成果:
- 使用水蒸气辅助升华,获得了超过99.33%的MoO3回收,纯度为99.94%.
- 该过程产生了零废水,并没有消耗化学试剂.
- DFT的计算证实了挥发性MoO3-OH的形成在水蒸气大气中增强了升华.
- 直接成本大约比目前的烤-洗-净化方法低50%.
结论:
- 水蒸气辅助化是一种高效和环保的方法,用于从耗尽的HDS催化剂中回收MoO3.
- 这种技术在能源消耗,污染减少和成本效益方面提供了显著的优势.
- 这些发现支持采用这种可持续金属回收的创新方法.
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