在废物Na2SO4溶液处理中应用双隔膜双极膜电透析
Young-Jae Lee1, Min-Hyuk Seo1, Jae-Hyuk Chang1
1Department of Advanced Materials Science and Engineering, Daejin University, 1007 Hoguk-ro, Pocheon-si 11159, Republic of Korea.
Membranes
|October 28, 2025
概括
这项研究优化了双极膜电透析 (BMED) 来从硫酸 (Na2SO4) 中恢复氧化 (NaOH). 该BMED系统实现了高NaOH产量和度,证明了有效的离子运输和工艺稳定性.
科学领域:
- 化学工程是化学工程的重要组成部分.
- 电化学过程 电化学过程
- 膜技术 膜技术 膜技术
背景情况:
- 氧化 (NaOH) 是一种重要的工业化学品.
- 从工业副产品中有效地回收NaOH,如硫酸 (Na2SO4) 在经济和环境上都很重要.
- 双极膜电透析 (BMED) 为NaOH生产和回收提供了一个有前途的技术.
研究的目的:
- 为了评估从Na2SO4溶液中NaOH回收的双隔间BMED系统的性能.
- 调查关键操作参数对系统性能的影响,包括离子传输,NaOH度,电流效率和能耗.
- 确定最大限度地提高NaOH回收率和度的最佳条件,同时最大限度地降低能源消耗.
主要方法:
- 采用了恒流的两BMED系统,利用阴离体交换膜和双极膜.
- 操作参数的系统变化:电流密度,料度 (Na2SO4),初始基度 (NaOH) 和溶液体积.
- 监测的性能指标包括NaOH回收率,最终NaOH度,电流效率和能源消耗.
主要成果:
- 在最佳条件下 (450 A/m2,1.30 M Na2SO4,0.10 M初始NaOH,1.00 L体积) 产生了69.21%的NaOH回收,2.13 M的最终度,36.39%的电流效率和4.72 kWh/kg的NaOH产量.
- 将NaOH度最大化为2.85M (在0.50L初始体积下) 增加了能源消耗和水运输,损害了整体效率.
- 该研究证明了通过BMED优化实现高NaOH度和恢复率的可行性.
结论:
- 开发的BMED系统有效地从Na2SO4溶液中回收NaOH.
- 过程参数显著影响回收率,度,电流效率和能源消耗.
- 平衡NaOH度和能源效率对于可持续的BMED工艺设计至关重要.
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