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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Confined Redox Reactions of Iodide in Carbon Nanopores for Fast and Energy-Efficient Desalination of Brackish Water and Seawater

Texto completo
Autor(es):
Lee, Juhan [1, 2] ; Srimuk, Pattarachai [1, 2] ; Carpier, Sidonie [1, 2] ; Choi, Jaehoon [1, 3] ; Zornitta, Rafael Linzmeyer [4, 1] ; Kim, Choonsoo [1] ; Aslan, Mesut [1] ; Presser, Volker [1, 2]
Número total de Autores: 8
Afiliação do(s) autor(es):
[1] INM Leibniz Inst New Mat, Campus D2 2, D-66123 Saarbrucken - Germany
[2] Saarland Univ, Dept Mat Sci & Engn, Campus D2 2, D-66123 Saarbrucken - Germany
[3] Korea Univ Technol & Educ, Sch Energy Mat & Chem Engn, 1600 Chungjeol Ro, Cheonan 31253 - South Korea
[4] Univ Fed Sao Carlos, Dept Chem Engn, BR-13565905 Sao Carlos, SP - Brazil
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: CHEMSUSCHEM; v. 11, n. 19, p. 3460-3472, OCT 11 2018.
Citações Web of Science: 9
Resumo

Faradaic deionization is a promising new seawater desalination technology with low energy consumption. One drawback is the low water production rate as a result of the limited kinetics of the ion intercalation and insertion processes. We introduce the redox activities of iodide confined in carbon nanopores for electrochemical desalination. A fast desalination process was enabled by diffusionless redox kinetics governed by thin-layer electrochemistry. A cell was designed with an activated carbon cloth electrode in NaI aqueous solution, which was separated from the feedwater channel by a cation-exchange membrane. Coupled with an activated carbon counter electrode and an anion-exchange membrane, the half-cell in NaI with a cation-exchange membrane maintained performance even at a high current of 2.5 Ag-1 (21 mA cm(-2)). The redox activities of iodide allowed a high desalination capacity of 69 mg g(-1) (normalized by the mass of the working electrode) with stable performance over 120 cycles. Additionally, we provide a new analytical method for unique performance evaluation under single-pass flow conditions regarding the water production rate and energy consumption. Our cell concept provides flexible performance for low and high salinity and, thus, enables the desalination of brackish water or seawater. Particularly, we found a low energy consumption (1.63 Wh L-1) for seawater desalination and a high water production rate (25 Lm(-2)h(-1)) for brackish water. (AU)

Processo FAPESP: 15/26593-3 - Dessalinização por deionização capacitiva: desenvolvimento de eletrodos e otimização do processo
Beneficiário:Rafael Linzmeyer Zornitta
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 16/24684-4 - Desenvolvimento de carvão ativado de lignina para uso como eletrodo em deionização capacitiva de soluções multicomponente
Beneficiário:Rafael Linzmeyer Zornitta
Linha de fomento: Bolsas no Exterior - Estágio de Pesquisa - Doutorado