Effect of Mg2+ions on energy generation by Reverse Electrodialysis
(2016) In Journal of Membrane Science 520. p.499-506- Abstract
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/m2 MP(MP: membrane pair) - generated when feeding SGP-RE prototype with 0.5 molal//4 molal NaCl, to 0.06... (More)
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/m2 MP(MP: membrane pair) - generated when feeding SGP-RE prototype with 0.5 molal//4 molal NaCl, to 0.06 W/m2 MP- measured when using 0.5 molal//4 molal MgCl2solutions. Likewise, open circuit voltage decreased from 1.70 to 0.72 V. Evidence of uphill transport in the range of 0–30% MgCl2was 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 Ω cm2in pure NaCl solution, increased tenfold in pure MgCl2 solution.
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- author
- Avci, Ahmet H. LU ; Sarkar, Pinkey ; Tufa, Ramato A. ; Messana, Diego ; Argurio, Pietro ; Fontananova, Enrica ; Di Profio, Gianluca and Curcio, Efrem
- publishing date
- 2016-12-15
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Electrochemical Impedance Spectroscopy, Multi-ion solutions, Reverse Electrodialysis, Salinity Gradient Power
- in
- Journal of Membrane Science
- volume
- 520
- pages
- 8 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:84982170132
- ISSN
- 0376-7388
- DOI
- 10.1016/j.memsci.2016.08.007
- language
- English
- LU publication?
- no
- additional info
- Publisher Copyright: © 2016 Elsevier B.V.
- id
- dd9aaafb-04d9-4875-95e4-8eb2429d75a3
- date added to LUP
- 2022-05-13 10:50:18
- date last changed
- 2022-05-18 11:36:40
@article{dd9aaafb-04d9-4875-95e4-8eb2429d75a3, abstract = {{<p>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 Mg<sup>2+</sup>, the most abundant cation in natural water after Na<sup>+</sup>, on SGP-RE performance by power measurements on a lab-scale stack prototype. Maximum power density ranged from 1.06 W/m<sup>2</sup> <sub>MP</sub>(MP: membrane pair) - generated when feeding SGP-RE prototype with 0.5 molal//4 molal NaCl, to 0.06 W/m<sup>2</sup> <sub>MP</sub>- measured when using 0.5 molal//4 molal MgCl<sub>2</sub>solutions. Likewise, open circuit voltage decreased from 1.70 to 0.72 V. Evidence of uphill transport in the range of 0–30% MgCl<sub>2</sub>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 Mg<sup>2+</sup>concentration: membrane resistance, from a value of 2.41 Ω cm<sup>2</sup>in pure NaCl solution, increased tenfold in pure MgCl<sub>2</sub> solution.</p>}}, author = {{Avci, Ahmet H. and Sarkar, Pinkey and Tufa, Ramato A. and Messana, Diego and Argurio, Pietro and Fontananova, Enrica and Di Profio, Gianluca and Curcio, Efrem}}, issn = {{0376-7388}}, keywords = {{Electrochemical Impedance Spectroscopy; Multi-ion solutions; Reverse Electrodialysis; Salinity Gradient Power}}, language = {{eng}}, month = {{12}}, pages = {{499--506}}, publisher = {{Elsevier}}, series = {{Journal of Membrane Science}}, title = {{Effect of Mg<sup>2+</sup>ions on energy generation by Reverse Electrodialysis}}, url = {{http://dx.doi.org/10.1016/j.memsci.2016.08.007}}, doi = {{10.1016/j.memsci.2016.08.007}}, volume = {{520}}, year = {{2016}}, }