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Asymmetric electrod...
Asymmetric electrode capacitive deionization for energy efficient desalination
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- Toledo-Carrillo, Esteban (författare)
- KTH,Tillämpad fysik
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- Zhang, Xingyan (författare)
- KTH,Tillämpad fysik
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- Laxman, Karthik (författare)
- KTH,Tillämpad fysik
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- Dutta, Joydeep, Professor, 1964- (författare)
- KTH,Tillämpad fysik
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(creator_code:org_t)
- Elsevier, 2020
- 2020
- Engelska.
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Ingår i: Electrochimica Acta. - : Elsevier. - 0013-4686 .- 1873-3859. ; 358
- Relaterad länk:
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https://doi.org/10.1...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Capacitive deionization (CDI) is an emerging technology as a sustainable low energy process for desalination of brackish water. Activated carbon electrodes are often used in the CDI devices. Electrosorption capacity was found to be improved on asymmetric electrode configuration using activated carbon cloth doped with fluorine due to redistribution of electric potential. This led to improvement in desalination performance up to 12.4 mg/g for a desalination cycle of 6 min employing an asymmetric fluorinated electrode as cathode (ACC//F-ACC). A relatively high charge efficiency of 77 % was obtained representing 92 % charge efficiency neglecting the leakage currents. Furthermore, the ion adsorption rate was found to improve substantially due to an increased surface conductivity of the fluorinated electrode confirmed by Mott-Schottky analysis. Energy consumption during desalination of 1000 ppm sodium chloride solution of 0.71kWh/m(3) for symmetric electrode configuration was found to reduce by 36 % upon employing asymmetric configuration. This study shows some of the benefits of asymmetric configuration to achieve an optimal operation of CDI device, as well as improvements related to energy consumption.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Nyckelord
- Capacitive deionization
- Potential distribution
- Asymmetric electrodes
- Fluorine doping
- Nitrogen doping
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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