Low energy consumption flow capacitive deionization with a combination of redox couples and carbon slurry
Wei,Qiang1; Hu,Yudi1; Wang,Jian1; Ru,Qiang1; Hou,Xianhua1,2; Zhao,Lingzhi1,2; Yu,Denis Y.W.3; San Hui,Kwan4; Yan,Dongliang5; Hui,Kwun Nam6; Chen,Fuming1,2
Source PublicationCarbon
AbstractFlow-electrode capacitive deionization (FCDI) is a new sustainable desalination technology where continuous desalination can be achieved by the electrodialysis coupling method. However, its development is hindered owing to high energy consumption and low salt removal rate. Herein, by combining ferri-/ferrocyanide redox couple with flow activated carbon (AC)/carbon black (CB) slurry, continuous desalination process is achieved with a high salt removal rate of 1.31 μg cm s and low energy consumption of 102.68 kJ mol at the current density 2.38 mA cm (50 mA current for a 21 cm active area). The operating voltage plateau can be reduced to 0.69 V when 10 wt% AC/CB (mass ratio of 9:1) is mixed with 20 mM/20 mM ferri-/ferrocyanide as the flow electrodes, compared with more than 3 V for only carbon flow or redox medium alone. The influences of carbon content and current densities are further investigated to so that the performances can be controlled. This work enables the development of energy-saving desalination systems by coupling FCDI with redox desalination technique.
KeywordActivated carbon/carbon black Electrochemical desalination Flow-electrode capacitive deionization Redox desalination
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Cited Times [WOS]:3   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorChen,Fuming
Affiliation1.State Key Laboratory of Optic Information Physics and Technology,Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials,Guangdong Engineering Technology Research Center of Efficient Green Energy and Environment Protection Materials,School of Physics and Telecommunication Engineering,South China Normal University,Guangzhou,510006,China
2.SCNU Qingyuan Institute of Science and Technology Innovation Co.,Ltd.,Qingyuan,511517,China
3.School of Energy and Environment,City University of Hong Kong,Kowloon,Tat Chee Avenue,Hong Kong
4.Engineering,Faculty of Science,University of East Anglia,Norwich,United Kingdom
5.School of Material Science and Engineering,Guilin University of Electronic Technology,Guilin,541004,China
6.Joint Key Laboratory of the Ministry of Education,Institute of Applied Physics and Materials Engineering,University of Macau,Avenida da Universidade,Taipa,Macao
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GB/T 7714
Wei,Qiang,Hu,Yudi,Wang,Jian,et al. Low energy consumption flow capacitive deionization with a combination of redox couples and carbon slurry[J]. Carbon,2020,170:487-492.
APA Wei,Qiang,Hu,Yudi,Wang,Jian,Ru,Qiang,Hou,Xianhua,Zhao,Lingzhi,Yu,Denis Y.W.,San Hui,Kwan,Yan,Dongliang,Hui,Kwun Nam,&Chen,Fuming.(2020).Low energy consumption flow capacitive deionization with a combination of redox couples and carbon slurry.Carbon,170,487-492.
MLA Wei,Qiang,et al."Low energy consumption flow capacitive deionization with a combination of redox couples and carbon slurry".Carbon 170(2020):487-492.
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