TY - JOUR
T1 - Mitigating Water Crossover by Crosslinked Coating of Cation-Exchange Membranes for Brine Concentration
AU - Rommerskirchen, Alexandra
AU - Roth, Hannah
AU - Linnartz, Christian J.
AU - Egidi, Franziska
AU - Kneppeck, Christian
AU - Roghmans, Florian
AU - Wessling, Matthias
N1 - Funding Information:
A.R. and H.R. contributed equally to this work. This work was supported by the German Federal Ministry of Education and Research (BMBF) under the project “ElektroWirbel” (FKZ 13XP5008), BMBF-MOST “SepIon” (FKZ 02WIL1390), and by the European Research Council (ERC) under the European Unions Horizon 2020 research and innovation program (694946). This work was performed in part at the Center for Chemical Polymer Technology CPT, which is supported by the EU and the federal state of North Rhine-Westphalia (grant no. EFRE 30 00 883 02). M.W. appreciates the funding from the Alexander von Humboldt Foundation. The authors thank Karin Faensen for the high quality SEM images and Nils Weber, Nora Heinrich, Nora Grütering, Janna Kollbach, and Lynn Meyer for the preliminary work for this study. Open access funding enabled and organized by Projekt DEAL.
Funding Information:
A.R. and H.R. contributed equally to this work. This work was supported by the German Federal Ministry of Education and Research (BMBF) under the project “ElektroWirbel” (FKZ 13XP5008), BMBF‐MOST “SepIon” (FKZ 02WIL1390), and by the European Research Council (ERC) under the European Unions Horizon 2020 research and innovation program (694946). This work was performed in part at the Center for Chemical Polymer Technology CPT, which is supported by the EU and the federal state of North Rhine‐Westphalia (grant no. EFRE 30 00 883 02). M.W. appreciates the funding from the Alexander von Humboldt Foundation. The authors thank Karin Faensen for the high quality SEM images and Nils Weber, Nora Heinrich, Nora Grütering, Janna Kollbach, and Lynn Meyer for the preliminary work for this study.
Publisher Copyright:
© 2021 The Authors. Advanced Materials Technologies published by Wiley-VCH GmbH
PY - 2021/10
Y1 - 2021/10
N2 - Undesired water crossover through ion-exchange membranes is a significant limitation in electrically driven desalination processes. The effect of mitigating water crossover is twofold: 1) The desalination degree is less reduced due to the unwanted removal of water, and 2) the brine concentration is increased due to decreased dilution by an unwanted crossover of water molecules. Hence, water crossover limits the desalination and concentration efficiency of the processes, while the energy demand to achieve a certain level of desalination or concentration increases. This effect is especially pronounced when treating high salinity solutions, which goes hand in hand with the crossover of many ions through the ion-exchange membranes. A crosslinked coating for cation-exchange membranes (CEMs) is presented in this work, which can significantly mitigate such undesired water crossover. The efficacy is demonstrated using the flow-electrode capacitive deionization process applied for desalination and concentration of saline brines at feed concentrations of 60 and 120 g L−1 NaCl. With just a single coated CEM, the water crossover was reduced by up to 54%.
AB - Undesired water crossover through ion-exchange membranes is a significant limitation in electrically driven desalination processes. The effect of mitigating water crossover is twofold: 1) The desalination degree is less reduced due to the unwanted removal of water, and 2) the brine concentration is increased due to decreased dilution by an unwanted crossover of water molecules. Hence, water crossover limits the desalination and concentration efficiency of the processes, while the energy demand to achieve a certain level of desalination or concentration increases. This effect is especially pronounced when treating high salinity solutions, which goes hand in hand with the crossover of many ions through the ion-exchange membranes. A crosslinked coating for cation-exchange membranes (CEMs) is presented in this work, which can significantly mitigate such undesired water crossover. The efficacy is demonstrated using the flow-electrode capacitive deionization process applied for desalination and concentration of saline brines at feed concentrations of 60 and 120 g L−1 NaCl. With just a single coated CEM, the water crossover was reduced by up to 54%.
KW - brine concentration
KW - flow-electrode capacitive deionization
KW - ion-exchange membranes
KW - selective coating
KW - water desalination
UR - http://www.scopus.com/inward/record.url?scp=85108309071&partnerID=8YFLogxK
U2 - 10.1002/admt.202100202
DO - 10.1002/admt.202100202
M3 - Article
AN - SCOPUS:85108309071
SN - 2365-709X
VL - 6
JO - Advanced Materials Technologies
JF - Advanced Materials Technologies
IS - 10
M1 - 2100202
ER -
