电气脱膜技术用于油水乳液的封闭分离
Yuna Gu1, Qiancheng Xia1, Bin Liu1
1State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China.
Environmental science & technology
|October 29, 2024
概括
一种新的电解技术使用导电膜微通道来有效分离油水乳液. 这种方法显著降低了能源消耗和电压要求,以实现有效的油水分离.
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.
- 物理化学 物理化学
背景情况:
- 油水 (O/W) 乳液,特别是那些被表面活性剂稳定的乳液,由于其固有的稳定性,在分离方面存在重大挑战.
- 传统的电凝,虽然有效,但受到高能耗 (>50kWh/m3) 的影响.
- 不良的法拉戴反应也可能发生在传统的电凝方法中.
研究的目的:
- 开发一种创新和节能的电气脱硫技术,用于油水分离.
- 研究导电膜微通道内的脱机制.
- 为了减少有效分离乳液所需的能源消耗和电压.
主要方法:
- 开发一种利用导电膜微通道的脱系统.
- 低电压 (12 V) 的应用,用于电气脱.
- 在现场光显微镜和COMSOL模拟以阐明脱机制.
- 性能评估,包括分离效率和能源消耗.
主要成果:
- 在显著降低电压 (12V) 的情况下,达到91.4 ± 3.0%的高分离效率.
- 在低能耗 (3千瓦时/米3) 的情况下,证明了超高的透性 (>3000 L/(m2·h·bar)) .
- 确定了关键的机制步骤:表面活性剂的电场再分配,通过介电泳增强滴滴碰撞概率,并通过膜孔提高碰撞效率.
结论:
- 拟议的导电膜微通道技术为油水乳液脱乳化提供了高能效和有效的解决方案.
- 这种方法克服了传统电凝的局限性,特别是高能耗和法拉代反应.
- 这些发现表明了下一代脱和油水分离技术的革命性途径.
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