https://scholars.lib.ntu.edu.tw/handle/123456789/625512
標題: | Redox-flow battery with four-channel architecture for continuous and efficient desalination over a wide salinity working range | 作者: | Cheng C.-Y Chen T.-H Chen K.-Y Ma J CHIA-HUNG HOU |
關鍵字: | Energy consumption; Multichannel electrochemical desalination; Redox couples; Redox-flow battery; Seawater desalination | 公開日期: | 2022 | 卷: | 534 | 來源出版物: | Desalination | 摘要: | In this study, redox-flow battery desalination (FBD) with a four-channel cell architecture was utilized for electrochemical desalination at different salinity levels. Herein, continuous desalination without a discharge step was achieved by simultaneous generation of desalted and brine streams in the diluted and concentrated chambers, while the ferri-/ferrocyanide redox couple was independently recirculated between the anode and cathode chambers. Notably, a relatively low constant voltage of 0.2 V successfully drove redox reactions for ion motion. The salt removal rate was enhanced by increasing the applied voltage but at the cost of higher energy consumption. Employing a higher concentration of ferri-/ferrocyanide (i.e., 100 mM) provided faster reaction kinetics and charge transfer in the FBD chambers. By treating NaCl solutions with concentrations in the range 3000–35,000 mg/L at 0.2 V, we demonstrated that the average salt removal rate increased from 14.7 to 96.2 μg/min-cm2. The molar energy consumption increased slightly from 18.5 to 20.6 kJ/mole, which was associated with a high charge efficiency >93.8%. This feature indicates the possible utility of FBD for desalting solutions with high salinity levels up to that of seawater. As demonstrated, FBD delivered >90% salt removal for real seawater desalination with an energy consumption of 3.34 kWh/m3. © 2022 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85129081980&doi=10.1016%2fj.desal.2022.115783&partnerID=40&md5=0d75b7a08dae0b143c0322f6ebeb9951 https://scholars.lib.ntu.edu.tw/handle/123456789/625512 |
ISSN: | 00119164 | DOI: | 10.1016/j.desal.2022.115783 | SDG/關鍵字: | Charge transfer; Desalination; Electric discharges; Electrodes; Flow batteries; Reaction kinetics; Redox reactions; Seawater; Sodium chloride; Channel architecture; Electrochemicals; Energy-consumption; Four-channel; Multi channel; Multichannel electrochemical desalination; Redox couple; Removal rate; Salinity levels; Seawater desalination; Energy utilization; desalination; energy use; redox conditions; salinity; seawater |
顯示於: | 環境工程學研究所 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。