Modeling the capacitive deionization batch mode operation for desalination
Modeling the capacitive deionization batch mode operation for desalination
复制标题
DOI：
10.1016/j.jiec.2013.12.020
复制
发表时间：
2014-09
影响因子：
6.1
通讯作者：
Y. Jande;W. Kim
中科院分区：
文献类型：
--
作者：
Y. Jande;W. Kim
电容去离子(CDI)是一种新兴的海水淡化技术，在该技术中，盐水通过一对极化/偏置电极流动。阳离子和阴离子分别被吸引到负极和正极。在CDI操作中，有两种可能的模式：单次通过和批处理模式。在单程操作中，盐水只通过CDI池一次，而在间歇模式操作中，固定体积的盐水不断循环，直到达到稳定状态。给出了CDI电池在批处理模式下的暂态响应。该模型考虑了单程CDI操作和回收池中发生的混合现象。利用实验数据对所建立的模型进行了验证，并推导出了在给定的操作参数：流速、盐水流量、CDI电容、CDI电阻、间隔物体积、死区体积、外加电位和盐水初始浓度下预测CDI电池稳态的方程。
Capacitive deionization (CDI) is an emerging desalination technology in which saline water flows through a pair of polarized/biased electrodes. The cations and anions are attracted towards the negative and positive electrodes, respectively. In CDI operation there are two possible modes: single pass and batch mode. In single pass operation, saline water passes only once through the CDI cell, whereas in batch mode operation, the fixed volume of saline water is recycled continuously until a steady state is reached. This paper presents the transient response of the CDI cell under batch mode operation. The model is developed by taking into account single pass CDI operation and the mixing phenomena that occur in the recycling tank. The developed model was successfully validated using experimental data, and the model helped to derive the equation for predicting the steady state of the CDI cell for the given operating parameters: flow rate, saline water quantity, CDI capacitance, CDI resistance, spacer volume, dead volume, applied potential, and initial concentration of the saline water.