从消耗的腐蚀性流中回收硫:通过双重电化学化学战略实现选择性转化
Haoran Chi1, Jinghao Bi2, Xiao Xu2
1National Engineering Laboratory for Industrial Wastewater Treatment, East China University of Science and Technology, Shanghai 200237, China.
Water research
|February 6, 2026
概括
这项研究提出了一种节能方法,利用新型催化剂从消耗的腐蚀性流中回收硫. 该工艺实现了高硫化物去除和选择性聚硫化物生产,为工业脱硫提供了绿色解决方案.
科学领域:
- 环境化学环境化学
- 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:
- 含有硫化物的消耗性腐蚀性流 (SCS) 构成环境风险,是未充分利用的硫源.
- 目前的处理方法耗费大量能源,需要恶劣的条件,或缺乏对有价值的硫产品的选择性.
- 了解硫化物氧化机制和控制产品分布是实际应用的关键挑战.
研究的目的:
- 开发一种选择性和能源效率高的战略,用于从SCS中回收硫.
- 阐明硫化物氧化机制和性介质中的动力学.
- 验证开发过程的技术经济可行性和实际可行性.
主要方法:
- 在泡 (TMS/NF) 上合成过渡金属硫化物催化剂,采用双步热水法.
- 在模拟和真实SCS中使用优化的CuxS-0.2/NF电极对硫化物进行电化学氧化.
- 使用离子染色学 (IC) 和紫外线光谱学进行分析,以确定反应动力学和产品选择性.
- 通过二氧化碳诱导的多硫化物质质子回收元素硫.
主要成果:
- 优化的CuxS-0.2/NF电极实现了95%的硫化物去除和87%的可溶性聚硫化物选择性 (S<0xE2><0x82><0x99>2−).
- 硫化物氧化遵循零阶动力学,确保复杂矩阵的稳定性能.
- 该过程在0.81±0.1V的电池电压下显示了低能耗 (0.62kWh·kg-1S).
- 高纯度元素硫 (α-S8) 已成功从真实SCS中回收.
结论:
- 一个双重的电化学-化学策略提供了一个可扩展和节能的解决方案,用于从SCS中回收硫.
- 该研究阐明了硫化物氧化机制和动力学,使得可控制的产品分销成为可能.
- 这种方法推进了绿色脱硫技术,促进了从工业废物流中回收资源.
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