Energy Efficiency of Capacitive Deionization

Capacitive deionization (CDI) as a class of electrochemical desalination has attracted fast-growing research interest in recent years. A significant part of this growing interest is arguably attributable to the premise that CDI is energy efficient and has the potential to outcompete other convention...

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Bibliographic Details
Published in:Environmental science & technology 2019-04, Vol.53 (7), p.3366-3378
Main Authors: Wang, Li, Dykstra, J. E, Lin, Shihong
Format: Article
Language:English
Subjects:
Deionization
Desalination
Electrochemical desalination
Electrochemistry
Energy consumption
Energy efficiency
Environmental Technology
Literature reviews
Milieutechnologie
Power efficiency
Sectie Milieutechnologie
Sub-department of Environmental Technology
WIMEK
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Summary:Capacitive deionization (CDI) as a class of electrochemical desalination has attracted fast-growing research interest in recent years. A significant part of this growing interest is arguably attributable to the premise that CDI is energy efficient and has the potential to outcompete other conventional desalination technologies. In this review, systematic evaluation of literature data reveals that while the absolute energy consumption of CDI is in general low, most existing CDI systems achieve limited energy efficiency from a thermodynamic perspective. We also analyze the causes for the relatively low energy efficiency and discuss factors that may lead to enhanced energy efficiency for CDI.
ISSN:0013-936X
1520-5851
DOI:10.1021/acs.est.8b04858