Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 429280
Title Water Desalination Using Capacitive Deionization with Microporous Carbon Electrodes
Author(s) Porada, S.; Weinstein, L.; Dash, R.; Wal, A.F. van der; Bryjak, M.; Gogotsi, Y.; Biesheuvel, P.M.
Source ACS Applied Materials and Interfaces 4 (2012)3. - ISSN 1944-8244 - p. 1194 - 1199.
DOI http://dx.doi.org/10.1021/am201683j
Department(s) WU Plant SciencesDepartment of Plant Sciences
Sub-department of Environmental Technology
WIMEK
Publication type Refereed Article in a scientific journal
Publication year 2012
Keyword(s) carbide-derived carbon - activated carbon - brackish-water - seawater desalination - aerogel electrodes - charge efficiency - aqueous-solutions - electrosorption - technology - adsorption
Abstract Capacitive deionization (CDI) is a water desalination technology in which salt ions are removed from brackish water by flowing through a spacer channel with porous electrodes on each side. Upon applying a voltage difference between the two electrodes, cations move to and are accumulated in electrostatic double layers inside the negatively charged cathode and the anions are removed by the positively charged anode. One of the key parameters for commercial realization of CDI is the salt adsorption capacity of the electrodes. State-of-the-art electrode materials are based on porous activated carbon particles or carbon aerogels. Here we report the use for CDI of carbide-derived carbon (CDC), a porous material with well-defined and tunable pore sizes in the sub-nanometer range. When comparing electrodes made with CDC with electrodes based on activated carbon, we find a significantly higher salt adsorption capacity in the relevant cell voltage window of 1.2–1.4 V. The measured adsorption capacity for four materials tested negatively correlates with known metrics for pore structure of the carbon powders such as total pore volume and BET-area, but is positively correlated with the volume of pores of sizes
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