电容去离子
电极
计算流体力学
材料科学
流量(数学)
体积流量
热交换器
机械工程
电化学
机械
化学
工程类
物理
物理化学
作者
Calvin He,Boyue Lian,Jinxing Ma,Changyong Zhang,Yuan Wang,Hengliang Mo,T. David Waite
出处
期刊:Water Research
[Elsevier]
日期:2021-09-01
卷期号:203: 117498-117498
被引量:17
标识
DOI:10.1016/j.watres.2021.117498
摘要
A novel design for a flow-electrode capacitive deionization (FCDI) system consisting of tubular electrodes in a shell and tube heat exchanger configuration is proposed. Each electrode consists of a metallic mesh current collector along the inner circumference of a tubular ion-exchange membrane. This tubular FCDI design is suitable for scale-up as it consists of easily manufactured components which can be assembled in an array. An apparatus with 4 tubular electrodes with a large effective area (202.3 cm2) was constructed and shown to provide a high net salt (NaCl) removal rate (0.15 mg s−1 at 1.2 V applied voltage and ∼2000 mg L−1 influent total dissolved solids concentration). A computational fluid dynamics (CFD) model incorporating ion migration and transport mechanisms was developed to simulate the ion concentration and electrical potential profiles in the water channel. The results of CFD modelling highlighted the need to maximize regions of both high potential gradient and high hydraulic flow in order to achieve optimal salt removal. In brief, this study presents a new design approach for FCDI scale-up and provides a computational tool for optimization of this design and future innovative FCDI designs.
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