TY - JOUR
T1 - Influence of Charge Regulation on the Performance of Shock Electrodialysis
AU - Wiegerinck, Harm T.M.
AU - Kersten, Reinder
AU - Wood, Jeffery A.
N1 - Funding Information:
The authors would like to acknowledge various members of the Membrane Science and Technology cluster, University of Twente for interesting discussions related to this work. This work was financially supported by the Dutch Research Council (NWO) via the KLEIN project OCENW.KLEIN.124.
Publisher Copyright:
© 2023 The Authors. Published by American Chemical Society.
PY - 2023/2/7
Y1 - 2023/2/7
N2 - In order to understand the ion transport in a continuous cross-flow shock electrodialysis process better, numerous theoretical studies have been carried out. One major assumption involved in these models has been that of a constant surface charge. In this work, we considered the influence of charge regulation, caused by changes in salt concentration, on the performance of a shock electrodialysis cell. Our results show that, by including charge regulation, much higher potentials need to be applied to reach the same degree of desalination, compared to the constant surface charge model. Furthermore, we found that operating at higher potentials could lead to substantial Joule heating and therefore temperature increases. Although somewhat lower potentials were required in the nonisothermal case versus the isothermal case with charge regulation, the required energy input for desalination is still much higher than the thermodynamic minimum. This works highlights the important role charge regulation can play in a shock electrodialysis process.
AB - In order to understand the ion transport in a continuous cross-flow shock electrodialysis process better, numerous theoretical studies have been carried out. One major assumption involved in these models has been that of a constant surface charge. In this work, we considered the influence of charge regulation, caused by changes in salt concentration, on the performance of a shock electrodialysis cell. Our results show that, by including charge regulation, much higher potentials need to be applied to reach the same degree of desalination, compared to the constant surface charge model. Furthermore, we found that operating at higher potentials could lead to substantial Joule heating and therefore temperature increases. Although somewhat lower potentials were required in the nonisothermal case versus the isothermal case with charge regulation, the required energy input for desalination is still much higher than the thermodynamic minimum. This works highlights the important role charge regulation can play in a shock electrodialysis process.
KW - UT-Hybrid-D
U2 - 10.1021/acs.iecr.2c03874
DO - 10.1021/acs.iecr.2c03874
M3 - Article
JO - Industrial & engineering chemistry research
JF - Industrial & engineering chemistry research
SN - 0888-5885
ER -