文献类型：期刊文献

英文题名：A new method to determine the optimal operating current (Ilim′) in the electrodialysis process

作者：Meng, Hong[1]; Deng, Dayue[2]; Chen, Shuangji[2]; Zhang, Guojun[3]

第一作者：Meng, Hong

通讯作者：Meng, H.

机构：[1] School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China; [2] College of Arts and Science, Beijing Union University, Beijing 100083, China; [3] Center for Water Research, Department of Civil Engineering, National University of Singapore, Singapore 119260, Singapore

第一机构：School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China

通讯机构：[1]School of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China

年份：2005

卷号：181

期号：1-3

起止页码：101-108

外文期刊名：Desalination

收录：EI(收录号：2005469476481);Scopus(收录号：2-s2.0-27644503262)

语种：英文

外文关键词：Current voltage characteristics - Desalination - Electric current measurement - Electric currents - Optimization

摘要：According to classical electrodialysis (ED) theory, measuring limiting current (Ilim) with an assembled stack is a commonly used technique to decide operating current. The current/voltage method of recognizing limiting current does not always yield unambiguous estimates of the limiting condition when applied to a practical electrodialysis apparatus. Some researchers have suggested an arbitrary method of using current/voltage data. Considering that the aim of ED was to obtain high desalting efficiency, a new parameter regarding the optimal operating current has been defined as Ilim′, and a new method to determine Ilim′ was proposed to guide the operation of the ED process in this paper. This method consisted of measuring current as a function of desalting efficiency and determining the inflexion in a η-I curve. To prove the feasibility of Ilim′, the V/I, V/I-I and η-I curves were plotted and compared by using NaCl aqueous solutions at different conductivities. The experimental results showed that Ilim′ determined by the η-I curve was exactly located between the two inflexions in the V/I and V/I-I curves. A method of combining the η-I curve with the V/I-I curve was proposed to decide the range of operating current. Compared to the current/voltage method, this method is more readable and practical. ? 2005 Elsevier B.V. All rights reserved.