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Volume Averaging Study of the Capacitive Deionization Process in Homogeneous Porous Media [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy, 2015.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description:
pages 61-80 : digital, PDF file
Additional Creators:
Oak Ridge National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
Ion storage in porous electrodes is important in applications such as energy storage by supercapacitors, water purification by capacitive deionization, extraction of energy from a salinity difference and heavy ion purification. In this paper, a model is presented to simulate the charge process in homogeneous porous media comprising big pores. It is based on a theory for capacitive charging by ideally polarizable porous electrodes without faradaic reactions or specific adsorption of ions. A volume averaging technique is used to derive the averaged transport equations in the limit of thin electrical double layers. Transport between the electrolyte solution and the charged wall is described using the Gouy–Chapman–Stern model. The effective transport parameters for isotropic porous media are calculated solving the corresponding closure problems. Finally, the source terms that appear in the average equations are calculated using numerical computations. An alternative way to deal with the source terms is proposed.
Report Numbers:
E 1.99:1286684
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Note:
Published through SciTech Connect.
05/05/2015.
"ED1902000"
"CEED291"
Transport in Porous Media 109 1 ISSN 0169-3913 AM
Jorge Gabitto; Costas Tsouris.
Funding Information:
AC05-0096OR22725
View MARC record | catkey: 23759228