电流与浓差对逆电渗析电堆内质量传递的影响

徐士鸣; 张凯; 吴曦; 吴德兵; 胡军勇; 何其琛; 金东旭; 王平

doi:10.11949/j.issn.0438-1157.20180449

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电流与浓差对逆电渗析电堆内质量传递的影响

流体力学与传递现象 | 更新时间：2025-12-10

- 电流与浓差对逆电渗析电堆内质量传递的影响
- Influence of current density and concentration difference between solutions on mass transfer in reverse electro-dialysis stack
- 化工学报 2018年第10期页码：4206-4215
- 作者机构：
  
  大连理工大学能源与动力学院, 海洋能源利用与节能教育部重点实验室,辽宁,大连,116024
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20180449
  中图分类号： Q152
- 网络首发：2018-10-05，
  
  纸质出版：2018-10-05
- 稿件说明：
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徐士鸣, 张凯, 吴曦, 等. 电流与浓差对逆电渗析电堆内质量传递的影响[J]. 化工学报, 2018,(10):4206-4215.

XU Shiming, ZHANG Kai, WU Xi, et al. Influence of current density and concentration difference between solutions on mass transfer in reverse electro-dialysis stack[J]. CIESC Journal, 2018, (10): 4206-4215.
徐士鸣, 张凯, 吴曦, 等. 电流与浓差对逆电渗析电堆内质量传递的影响[J]. 化工学报, 2018,(10):4206-4215. DOI： 10.11949/j.issn.0438-1157.20180449.

XU Shiming, ZHANG Kai, WU Xi, et al. Influence of current density and concentration difference between solutions on mass transfer in reverse electro-dialysis stack[J]. CIESC Journal, 2018, (10): 4206-4215. DOI： 10.11949/j.issn.0438-1157.20180449.

摘要

以氯化钠溶液作为工质情况下，通过改变逆电渗析电堆输出电流和溶液浓差，对由5对Selemion型离子交换膜（IEMs）单元电池所构成的实验用RED电堆进行堆内质量传递规律的实验研究。研究结果发现，IEMs选择性系数（a）、溶剂透膜渗透速率（vw）、溶质透膜迁移通量（JNaCl）和同价离子透膜扩散率（DNaCl）均受电堆电流密度和溶液浓差的影响。当溶液浓差增大时，a降低，而vw、JNaCl和DNaCl均增大；当电流密度增大时，a和vw降低，JNaCl和DNaCl增大。

Abstract

Taking the NaCl aqueous solution as the working fluid

the mass transfer characteristic of which in a reverse electro-dialysis (RED) stack have been tested under the conditions of changing the current density and concentration difference between solutions through the RED stack. The RED stack used in the experiments was composed of 5 unit membrane cells with Selemion type of ion exchange membranes (IEMs). The results showed that the selectivity coefficient (a)

solvent permeability ratio (vw)

solute ion transport flux (JNaCl) and co-ion diffusion rate (DNaCl) of IEMs were affected by stack current density and solution concentration. When the concentration difference increases

the a reduces

but the vw

JNaCl and DNaCl increase. With the increase of the electric current density exported by the RED stack

the α and vw reduce

but the JNaCl and DNaCl increase.

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