在使用的酸电池中有效的脱硫器回收利用零碳前体低温炼的粘贴处置
Fei Li1,2, Neng-Wu Zhu1,3,4,5, Yun-Hao Xi1
1School of Environment and Energy, South China University of Technology, Guangzhou, 510006, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|September 20, 2024
概括
这项研究提出了一种可持续的方法,通过再生酸 (Na2MoO4) 来回收酸电池 (LAB),以有效地回收和脱硫. 这种闭环过程最大限度地减少了化学废物,并降低了能源消耗.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 废弃的酸电池 (LAB) 带来了重大环境风险,并损失了宝贵的资源.
- 目前的回收方法通常涉及高化学试剂消耗和能源密集型工艺.
- 开发有效和可持续的回收策略对于LAB是环境保护和资源循环的关键.
研究的目的:
- 为废弃的LABs糊 (SLBP) 制定一个闭环回收策略,以尽量减少化学试剂的消耗.
- 为了证明聚酸盐 (Na2MoO4) 的再生和再利用,以实现高效的脱硫和回收.
- 评估拟议的回收过程的环境和经济可行性.
主要方法:
- 利用Na2MoO4作为SLBP脱硫的关键试剂,得到实验和DFT计算的支持.
- 实施了绿色液和再结晶过程,以回收高纯度的.
- 开发了Na2MoO4在600°C的再生方法,使用LAB的聚烯外和NaOH.
- 在多个循环中评估了脱硫效率和试剂重复使用.
主要成果:
- 实现了99.13%的硫酸盐重量消除,并恢复了99.97%的重量作为零碳前体.
- 在600°C处再生Na2MoO4,明显低于传统炼温度 (>1000°C).
- 证明了高的重复使用脱硫效率 (98.67重量%) 和保持效率超过97.36重量%在两个周期.
- 允许重复使用99.83%重量Na2MoO4和回收95.27%重量Pb,而不产生废水或渣渣.
结论:
- 开发的闭环策略提供了一种高效,经济和环保的方法来回收使用过的LAB.
- Na2MoO4的再生和再利用显著降低了化学试剂的消耗和工艺温度.
- 这种创新方法有助于资源循环,并减轻酸电池废弃物的环境影响.
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