高效洗工艺,用于从废用的铁酸盐中选择性地洗
Guidong Li1, Ye Chen1, Mingkun Wu1
1Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, Guizhou, China.
Waste management (New York, N.Y.)
|September 24, 2024
概括
回收使用过的铁酸盐 (LiFePO4) 电池至关重要. 这项研究提出了一种使用硫酸盐和过氧化进行高效回收的绿色方法,实现了99.83%的出水.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 越来越多的废弃铁酸盐 (LiFePO4) 电池需要可持续的回收解决方案.
- 有效的资源回收和环境保护对于处理废弃的LiFePO4 (SLFP) 电池至关重要.
研究的目的:
- 为从SLFP电池中回收开发一种温和,高效和高度选择性的出过程.
- 研究出水过程的底层机制.
主要方法:
- 使用高硫酸盐 (K2S2O7) 和过氧化 (H2O2) 溶解.
- 优化浸出条件,包括剂量度,温度,时间和固体-液体比率.
- 通过热力学研究,XRD,XPS,FTIR和SEM分析出水机制.
- 使用碳酸 (K2CO3) 净化浸出溶液并沉碳酸 (Li2CO3),使用碳酸 (K2CO3).
主要成果:
- 在最佳条件下实现了高出水率 (99.83%) 与最小的铁出水率 (0.34%).
- 确定了最佳条件:4体积% 30重量% H2O2,0.08mol/L K2S2O7,25°C,5分钟,以及20g/L固体液体比.
- 证明了转化为碳酸和废水中的硫酸的潜在回收.
结论:
- 成功开发了一种可持续和绿色的过程,用于从SLFP电池中回收.
- 该研究提供了一种新的方法,用于从废旧电池中回收资源,促进循环经济.
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