Effect of different aqueous solutions of pure salts and salt mixtures in reverse electrodialysis systems for closed-loop applications

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8 Citazioni (Scopus)

Abstract

Reverse Electrodialysis (RED) in a closed-loop arrangement is a viable way to convert low-grade heat into electric power. The present work experimentally investigates the use of pure salt- and equimolar two salts-water solutions as feeds in a lab-scale RED unit. RED performances were analysed in terms of Open Circuit Voltage (OCV), stack resistance and corrected power density. The pure salts and the mixtures employed were chosen via a computational analysis. Effect of feed solution velocity and concentration was investigated. Results concerning the pure salt-water experiments show that NH4Cl is the most performing salt in the concentration range probed, while higher power density values are expected with the use of LiCl at larger concentrations. As regards the salt binary mixtures, in some cases, the measured stack electrical resistance was found lower than both the two values measured for the corresponding pure salts, thus resulting into higher power density values for the mixtures. This surprising experimental evidence suggests that it is possible to increase the power produced by a conventional RED unit by adding an equivalent molar quantity of another suitable salt. Finally, among the mixtures tested, the NH4Cl-LiCl mixture appears as the most promising, thanks to the combination of the favorable properties of these two salts.
Lingua originaleEnglish
pagine (da-a)315-325
Numero di pagine11
RivistaJournal of Membrane Science
Volume551
Stato di pubblicazionePublished - 2018

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electrodialysis
Electrodialysis
Salts
aqueous solutions
salts
radiant flux density
Acoustic impedance
Saline water
Open circuit voltage
electrical resistance
open circuit voltage
Electric Impedance
grade
Hot Temperature
heat
Water

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Filtration and Separation
  • Physical and Theoretical Chemistry
  • Materials Science(all)

Cita questo

@article{673024ab64bc42478148b398ac7bd7a6,
title = "Effect of different aqueous solutions of pure salts and salt mixtures in reverse electrodialysis systems for closed-loop applications",
abstract = "Reverse Electrodialysis (RED) in a closed-loop arrangement is a viable way to convert low-grade heat into electric power. The present work experimentally investigates the use of pure salt- and equimolar two salts-water solutions as feeds in a lab-scale RED unit. RED performances were analysed in terms of Open Circuit Voltage (OCV), stack resistance and corrected power density. The pure salts and the mixtures employed were chosen via a computational analysis. Effect of feed solution velocity and concentration was investigated. Results concerning the pure salt-water experiments show that NH4Cl is the most performing salt in the concentration range probed, while higher power density values are expected with the use of LiCl at larger concentrations. As regards the salt binary mixtures, in some cases, the measured stack electrical resistance was found lower than both the two values measured for the corresponding pure salts, thus resulting into higher power density values for the mixtures. This surprising experimental evidence suggests that it is possible to increase the power produced by a conventional RED unit by adding an equivalent molar quantity of another suitable salt. Finally, among the mixtures tested, the NH4Cl-LiCl mixture appears as the most promising, thanks to the combination of the favorable properties of these two salts.",
author = "Andrea Cipollina and Micale, {Giorgio Domenico Maria} and Alessandro Tamburini and Maurizio Bevacqua and {Van Baak}, Willem and Micari and Putts",
year = "2018",
language = "English",
volume = "551",
pages = "315--325",
journal = "Journal of Membrane Science",
issn = "0376-7388",
publisher = "Elsevier",

}

TY - JOUR

T1 - Effect of different aqueous solutions of pure salts and salt mixtures in reverse electrodialysis systems for closed-loop applications

AU - Cipollina, Andrea

AU - Micale, Giorgio Domenico Maria

AU - Tamburini, Alessandro

AU - Bevacqua, Maurizio

AU - Van Baak, Willem

AU - Micari, null

AU - Putts, null

PY - 2018

Y1 - 2018

N2 - Reverse Electrodialysis (RED) in a closed-loop arrangement is a viable way to convert low-grade heat into electric power. The present work experimentally investigates the use of pure salt- and equimolar two salts-water solutions as feeds in a lab-scale RED unit. RED performances were analysed in terms of Open Circuit Voltage (OCV), stack resistance and corrected power density. The pure salts and the mixtures employed were chosen via a computational analysis. Effect of feed solution velocity and concentration was investigated. Results concerning the pure salt-water experiments show that NH4Cl is the most performing salt in the concentration range probed, while higher power density values are expected with the use of LiCl at larger concentrations. As regards the salt binary mixtures, in some cases, the measured stack electrical resistance was found lower than both the two values measured for the corresponding pure salts, thus resulting into higher power density values for the mixtures. This surprising experimental evidence suggests that it is possible to increase the power produced by a conventional RED unit by adding an equivalent molar quantity of another suitable salt. Finally, among the mixtures tested, the NH4Cl-LiCl mixture appears as the most promising, thanks to the combination of the favorable properties of these two salts.

AB - Reverse Electrodialysis (RED) in a closed-loop arrangement is a viable way to convert low-grade heat into electric power. The present work experimentally investigates the use of pure salt- and equimolar two salts-water solutions as feeds in a lab-scale RED unit. RED performances were analysed in terms of Open Circuit Voltage (OCV), stack resistance and corrected power density. The pure salts and the mixtures employed were chosen via a computational analysis. Effect of feed solution velocity and concentration was investigated. Results concerning the pure salt-water experiments show that NH4Cl is the most performing salt in the concentration range probed, while higher power density values are expected with the use of LiCl at larger concentrations. As regards the salt binary mixtures, in some cases, the measured stack electrical resistance was found lower than both the two values measured for the corresponding pure salts, thus resulting into higher power density values for the mixtures. This surprising experimental evidence suggests that it is possible to increase the power produced by a conventional RED unit by adding an equivalent molar quantity of another suitable salt. Finally, among the mixtures tested, the NH4Cl-LiCl mixture appears as the most promising, thanks to the combination of the favorable properties of these two salts.

UR - http://hdl.handle.net/10447/283686

M3 - Article

VL - 551

SP - 315

EP - 325

JO - Journal of Membrane Science

JF - Journal of Membrane Science

SN - 0376-7388

ER -