Energy efficiency enhancement of electromembrane desalination systems by local flow redistribution optimized for the asymmetry of cation/anion diffusivity

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• 作者：Bumjoo Kim^a ; ¹ ; Siwon Choi^b ; ¹ ; Van Sang Pham^c ; Rhokyun Kwak^d ; Jongyoon Han^a ; ^e ; ^f ; ^{jyhan@mit.edu}
• 关键词：Electrodialysis ; Mass transport enhancement ; Spacer engineering ; Concentration polarization ; Ion concentration visualization
• 刊名：Journal of Membrane Science
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：524
• 期：Complete
• 页码：280-287
• 全文大小：1889 K
• 卷排序：524

文摘

Ion concentration and velocity profile in electrodialysis systems were visualized. Visualization was coupled with quantitative analysis in experiment and simulation. Optimal spacer location in electrodialysis is studied. Mechanism for mass transport enhancement by spacers is explained. Asymmetry of cation and anion diffusivity was utilized in spacer optimization.