DOI: 10.1016/j.watres.2017.11.025
Scopus记录号: 2-s2.0-85034447820
论文题名: Quantifying the flow efficiency in constant-current capacitive deionization
作者: Hawks S.A. ; Knipe J.M. ; Campbell P.G. ; Loeb C.K. ; Hubert M.A. ; Santiago J.G. ; Stadermann M.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 129 起始页码: 327
结束页码: 336
语种: 英语
英文关键词: Capacitive deionization
; Capacitive desalination
; CDI
; Flow efficiency
Scopus关键词: Desalination
; Effluents
; Water filtration
; Adsorption efficiency
; Capacitive deionization
; Cell architectures
; Constant current mode
; Cycling operations
; Desalinated water
; Effluent concentrations
; Flow efficiency
; Efficiency
; adsorption
; concentration (composition)
; desalination
; desorption
; efficiency measurement
; electrode
; flow stability
; operations technology
; quantitative analysis
; adsorption
; Article
; capacitive deionization
; cell volume
; chemical reaction
; cytoarchitecture
; desalination
; desorption
; electric conductivity
; electric current
; electrochemical impedance spectroscopy
; energy consumption
; limit of quantitation
; priority journal
; surface area
; water supply
; chemistry
; electrochemical analysis
; electrode
; procedures
; salinity
; theoretical model
; water management
; salt water
; Adsorption
; Electrochemical Techniques
; Electrodes
; Models, Theoretical
; Saline Waters
; Salinity
; Water Purification
英文摘要: Here we detail a previously unappreciated loss mechanism inherent to capacitive deionization (CDI) cycling operation that has a substantial role determining performance. This mechanism reflects the fact that desalinated water inside a cell is partially lost to re-salination if desorption is carried out immediately after adsorption. We describe such effects by a parameter called the flow efficiency, and show that this efficiency is distinct from and yet multiplicative with other highly-studied adsorption efficiencies. Flow losses can be minimized by flowing more feed solution through the cell during desalination; however, this also results in less effluent concentration reduction. While the rationale outlined here is applicable to all CDI cell architectures that rely on cycling, we validate our model with a flow-through electrode CDI device operated in constant-current mode. We find excellent agreement between flow efficiency model predictions and experimental results, thus giving researchers simple equations by which they can estimate this distinct loss process for their operation. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113103
Appears in Collections: 气候减缓与适应
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作者单位: Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, United States; Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, United States
Recommended Citation:
Hawks S.A.,Knipe J.M.,Campbell P.G.,et al. Quantifying the flow efficiency in constant-current capacitive deionization[J]. Water Research,2018-01-01,129