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Long-term durabilit...
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Nordstrand, JohanKTH,Material- och nanofysik
(författare)
Long-term durability of commercial capacitive deionization modules
- Artikel/kapitelEngelska2024
Förlag, utgivningsår, omfång ...
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Elsevier BV,2024
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LIBRIS-ID:oai:DiVA.org:kth-343196
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-343196URI
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https://doi.org/10.1016/j.desal.2024.117377DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:art swepub-publicationtype
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QC 20240209
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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.
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Laxman, KarthikStockholm Water Technology AB, Stockholmsvägen 116B, 187 30 Täby, Sweden, Stockholmsvägen 116B
(författare)
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Dutta, Joydeep,Professor,1964-KTH,Material- och nanofysik(Swepub:kth)u1dajeit
(författare)
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KTHMaterial- och nanofysik
(creator_code:org_t)
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Ingår i:Desalination: Elsevier BV5760011-91641873-4464
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