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Reverse Electrodialysis for energy production from natural river water and seawater

Avci, Ahmet H. LU ; Tufa, Ramato A. ; Fontananova, Enrica ; Di Profio, Gianluca and Curcio, Efrem (2018) In Energy 165. p.512-521
Abstract

The effectiveness of Salinity Gradient Power - Reverse Electrodialysis (SGP-RE) in real practice is still not clearly defined due to the lack of specific studies in literature, being investigations in large part limited to pure NaCl solutions or aqueous mixtures of two salts. In this work, we experimentally assessed the impact of natural feed streams (collected from Licetto river and Tyrrenian sea in Amantea - Italy) in terms of Open Circuit Voltage (OCV) and power density (Pd) measured on a lab-scale SGP-RE stack prototype; results have been compared to those obtained when using NaCl solutions having equivalent ionic strength. Highest OCV (3.68 V and 4.09 V) and Pd values (0.46 and 1.41 W∙m−2) were... (More)

The effectiveness of Salinity Gradient Power - Reverse Electrodialysis (SGP-RE) in real practice is still not clearly defined due to the lack of specific studies in literature, being investigations in large part limited to pure NaCl solutions or aqueous mixtures of two salts. In this work, we experimentally assessed the impact of natural feed streams (collected from Licetto river and Tyrrenian sea in Amantea - Italy) in terms of Open Circuit Voltage (OCV) and power density (Pd) measured on a lab-scale SGP-RE stack prototype; results have been compared to those obtained when using NaCl solutions having equivalent ionic strength. Highest OCV (3.68 V and 4.09 V) and Pd values (0.46 and 1.41 W∙m−2) were observed at temperature of 60 °C for real and synthetic feeds, respectively. The extent of electrical resistances (ion exchange membrane/electrical double layer/diffusion boundary layer) was elucidated by electrochemical impedance spectroscopy (EIS); in particular, a critical effect of real solution on cation exchange membrane (CEM) resistance was detected. Additionally, ionic characterization of process effluents revealed the occurrence of uphill transport of multivalent ions Mg2+, Ca2+ and SO42−.

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author
; ; ; and
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Electrochemical impedance spectroscopy, Natural feeds, Reverse Electrodialysis, Salinity gradient power, Uphill transport
in
Energy
volume
165
pages
10 pages
publisher
Elsevier
external identifiers
  • scopus:85054625709
ISSN
0360-5442
DOI
10.1016/j.energy.2018.09.111
language
English
LU publication?
no
additional info
Publisher Copyright: © 2018 Elsevier Ltd
id
abf03dd6-0ca4-4318-b960-0e6805b0097d
date added to LUP
2022-05-13 10:49:31
date last changed
2022-05-13 14:15:01
@article{abf03dd6-0ca4-4318-b960-0e6805b0097d,
  abstract     = {{<p>The effectiveness of Salinity Gradient Power - Reverse Electrodialysis (SGP-RE) in real practice is still not clearly defined due to the lack of specific studies in literature, being investigations in large part limited to pure NaCl solutions or aqueous mixtures of two salts. In this work, we experimentally assessed the impact of natural feed streams (collected from Licetto river and Tyrrenian sea in Amantea - Italy) in terms of Open Circuit Voltage (OCV) and power density (P<sub>d</sub>) measured on a lab-scale SGP-RE stack prototype; results have been compared to those obtained when using NaCl solutions having equivalent ionic strength. Highest OCV (3.68 V and 4.09 V) and P<sub>d</sub> values (0.46 and 1.41 W∙m<sup>−2</sup>) were observed at temperature of 60 °C for real and synthetic feeds, respectively. The extent of electrical resistances (ion exchange membrane/electrical double layer/diffusion boundary layer) was elucidated by electrochemical impedance spectroscopy (EIS); in particular, a critical effect of real solution on cation exchange membrane (CEM) resistance was detected. Additionally, ionic characterization of process effluents revealed the occurrence of uphill transport of multivalent ions Mg<sup>2+</sup>, Ca<sup>2+</sup> and SO<sub>4</sub><sup>2−</sup>.</p>}},
  author       = {{Avci, Ahmet H. and Tufa, Ramato A. and Fontananova, Enrica and Di Profio, Gianluca and Curcio, Efrem}},
  issn         = {{0360-5442}},
  keywords     = {{Electrochemical impedance spectroscopy; Natural feeds; Reverse Electrodialysis; Salinity gradient power; Uphill transport}},
  language     = {{eng}},
  month        = {{12}},
  pages        = {{512--521}},
  publisher    = {{Elsevier}},
  series       = {{Energy}},
  title        = {{Reverse Electrodialysis for energy production from natural river water and seawater}},
  url          = {{http://dx.doi.org/10.1016/j.energy.2018.09.111}},
  doi          = {{10.1016/j.energy.2018.09.111}},
  volume       = {{165}},
  year         = {{2018}},
}