基于盐的运输特性选择阳离子和阴离子交换膜的方法,用于双极膜制造
Maria F Rochow1, Harrison J Cassady2, Michael A Hickner1,2
1Department of Material Science and Engineering, Penn State, University Park, Pennsylvania 16802-1503, United States.
概括
本研究提出了一种选择组件膜以制造双极膜 (BPM) 的方法,用于海水电解等应用. 研究发现BPM中的面积电阻和盐流之间的权衡,这对于优化电化学设备至关重要.
科学领域:
- 电化学 电化学 电化学
- 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.
背景情况:
- 双极膜 (BPMs) 包含串联的阴离子和阴离子交换层.
- BPM越来越多地用于电化学设备,如水电解和二氧化碳减排.
- 为BPM制造选择最佳的组件膜是具有挑战性的,因为有许多可用的选项.
研究的目的:
- 评估阴离子和阴离子交换膜的稳态离子运输特性.
- 根据运输特性,开发一种选择BPM制造部件膜的方法.
- 模拟和预测制造BPM的盐流量和面积阻力.
主要方法:
- 调查了九个离子和九个阴离子交换膜.
- 在0.5mol/L的化溶液中测量盐流和面积阻力.
- 使用开发的选择方法制造了三个BPM,并开发了一个预测模型.
主要成果:
- 观察到一个权衡:面积阻力较高的膜具有较低的盐流量,反之亦然.
- 开发的方法促进了为BPMs选择组件膜的选择.
- 预测模型准确估计了BPM盐流量和面积电阻,与实验数据一致.
- 制造的BPM也表现出面积阻力-流量权衡.
结论:
- 已经建立了一个系统的方法来根据BPM的运输特性选择BPM的组件膜.
- 开发的模型有效地预测了BPM性能,有助于为特定应用选择材料.
- 面积阻力-流量权衡是BPM设计的关键因素,用于海水电解等电化学过程.
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