期刊
JOURNAL OF MEMBRANE SCIENCE
卷 520, 期 -, 页码 499-506出版社
ELSEVIER
DOI: 10.1016/j.memsci.2016.08.007
关键词
Salinity Gradient Power; Reverse Electrodialysis; Multi-ion solutions; Electrochemical Impedance Spectroscopy
资金
- Education, Audiovisual and Culture Executive Agency (EACEA-EU) within the programme EUDIME Erasmus Mundus Doctorate in Membrane Engineering [FPA 2011-0014, SGA 2014-0970]
Reverse Electrodialysis is today recognized as one of the most promising technology to harvest Salinity Gradient Power (SGP-RE). However, the effectiveness of SGP-RE in real practice is still not clearly defined due to the lack of specific studies in literature, being in large part limited to investigations on pure NaCl solutions. In this work we experimentally investigated the effect of Mg2+, the most abundant cation in natural water after Na+, on SGP-RE performance by power measurements on a lab-scale stack prototype. Maximum power density ranged from 1.06 W/m(Mp)(2) (MP: membrane pair) - generated when feeding SGP-RE prototype with 0.5 molal//4 molal NaCl, to 0.06 W/m(Mp)(2) - measured when using 0.5 molal//4 molal MgCl2 solutions. Likewise, open circuit voltage decreased from 1.70 to 0.72 V. Evidence of uphill transport in the range of 0-30% MgCl2 was confirmed by Ion Chromatography analysis carried out on inlet and outlet streams of SGP-RE stack. Electrochemical Impedance Spectroscopy analysis revealed that cation exchange membrane resistance was critically affected by Mg2+ concentration: membrane resistance, from a value of 2.41 Omega cm(2) in pure NaCl solution, increased tenfold in pure MgCl2 solution. (C) 2016 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据