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Long-term durabilit...
Long-term durability of commercial capacitive deionization modules
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- Nordstrand, Johan (författare)
- KTH,Material- och nanofysik
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- Laxman, Karthik (författare)
- Stockholm Water Technology AB, Stockholmsvägen 116B, 187 30 Täby, Sweden, Stockholmsvägen 116B
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- Dutta, Joydeep, Professor, 1964- (författare)
- KTH,Material- och nanofysik
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(creator_code:org_t)
- Elsevier BV, 2024
- 2024
- Engelska.
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Ingår i: Desalination. - : Elsevier BV. - 0011-9164 .- 1873-4464. ; 576
- Relaterad länk:
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https://doi.org/10.1...
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visa fler...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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visa färre...
Abstract
Ämnesord
Stäng
- Long-term durability is becoming increasingly relevant for capacitive deionization (CDI) as the technology emerges on the commercial scale. Short-term deionization studies have suggested that Faradaic leakages could be a major factor in electrode degradation, but the long-term effects are still unclear. In this study, we probe the degradation process of the desalination efficiency in commercial CDI modules for up to 52 days of non-stop operation. This corresponds to a little more than 100 m3 of water treated, and the lifetime production volume of the modules is estimated between 150,000–250,000 L of purified water. Surprisingly, the results demonstrate that the absolute long-term loss is largely linear with the cumulative charge leakage. This suggests short-term leakage currents could reasonably predict long-term degradation. Interestingly, the absolute loss mechanisms mean devices with higher total capacitance are more degradation resistant. Finally, shortening cycle times and other methods of reducing leakage would lead to a proportionally longer lifetime. Notably, the first 2 min of the 10 min operation retained 50 % of the performance with only 10 % of the leakage (10-fold reduction). In conclusion, the work provides a method for understanding, predicting, and reducing degradation in long-term operations with commercial CDI modules.
Ämnesord
- NATURVETENSKAP -- Fysik -- Annan fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Other Physics Topics (hsv//eng)
Nyckelord
- Capacitive deionization
- Degradation
- Desalination
- Durability
- Modeling
- Upscaling
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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