Influence of temperature on the electrosorption of ions from aqueous solutions using mesoporous carbon materials

K. Sharma; R. T. Mayes; J. O. Kiggans; S. Yiacoumi; J. Gabitto; D. W. Depaoli; S. Dai; C. Tsouris

doi:10.1016/j.seppur.2013.05.038

Influence of temperature on the electrosorption of ions from aqueous solutions using mesoporous carbon materials

K. Sharma, R. T. Mayes, J. O. Kiggans, S. Yiacoumi, J. Gabitto, D. W. Depaoli, S. Dai, C. Tsouris

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

Based on the electrosorption of ions by charged electrodes, the capacitive deionization method was considered for ion removal from saline water using mesoporous carbon electrodes. Mesoporous carbon was synthesized via a self-assembly method, with a narrow pore size distribution in the range of 6-10 nm. It was found that the rates of ion sorption and release by mesoporous carbon electrodes increase with an increase in the temperature of the solution. A drift in the conductivity was observed during electrosorption of Instant Ocean solutions, which may be explained as the result of competition between ions of different valence and size. The diffusion coefficient of ions during electrosorption was evaluated as a function of temperature, and a transport model coupled with an electrical-double-layer model was employed to calculate the mass of salt adsorbed by the electrodes. The calculated cumulative mass of salt captured in the electrical double layers of the electrodes was compared to the experimental data at different temperatures.

Original language	English
Pages (from-to)	206-213
Number of pages	8
Journal	Separation and Purification Technology
Volume	116
DOIs	https://doi.org/10.1016/j.seppur.2013.05.038
State	Published - 2013

Funding

Notice: This manuscript has been authored by UT-Battelle, LLC, under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. Support for this research was provided by the U.S. DOE Office of Energy Efficiency and Renewable Energy (EERE), under Contract DE-AC05-0096OR22725 with Oak Ridge National Laboratory. Work at Georgia Institute of Technology was supported by the U.S. National Science Foundation, under Grant No. CBET-0651683. The authors are also thankful to Bob Campbell, Tom Dorow, Sunita Kaushik, Bill Bourcier, and Fred Seamon of Campbell Applied Physics, Inc., for frequent discussions on capacitive deionization.

Funders	Funder number
National Science Foundation	CBET-0651683
U.S. Department of Energy
Office of Energy Efficiency and Renewable Energy	DE-AC05-0096OR22725
Oak Ridge National Laboratory

Keywords

Capacitive deionization
Desalination
Electrical double layer
Electrosorption
Temperature effects

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10.1016/j.seppur.2013.05.038

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title = "Influence of temperature on the electrosorption of ions from aqueous solutions using mesoporous carbon materials",

abstract = "Based on the electrosorption of ions by charged electrodes, the capacitive deionization method was considered for ion removal from saline water using mesoporous carbon electrodes. Mesoporous carbon was synthesized via a self-assembly method, with a narrow pore size distribution in the range of 6-10 nm. It was found that the rates of ion sorption and release by mesoporous carbon electrodes increase with an increase in the temperature of the solution. A drift in the conductivity was observed during electrosorption of Instant Ocean solutions, which may be explained as the result of competition between ions of different valence and size. The diffusion coefficient of ions during electrosorption was evaluated as a function of temperature, and a transport model coupled with an electrical-double-layer model was employed to calculate the mass of salt adsorbed by the electrodes. The calculated cumulative mass of salt captured in the electrical double layers of the electrodes was compared to the experimental data at different temperatures.",

keywords = "Capacitive deionization, Desalination, Electrical double layer, Electrosorption, Temperature effects",

author = "K. Sharma and Mayes, {R. T.} and Kiggans, {J. O.} and S. Yiacoumi and J. Gabitto and Depaoli, {D. W.} and S. Dai and C. Tsouris",

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AU - Sharma, K.

AU - Mayes, R. T.

AU - Kiggans, J. O.

AU - Yiacoumi, S.

AU - Gabitto, J.

AU - Depaoli, D. W.

AU - Dai, S.

AU - Tsouris, C.

PY - 2013

Y1 - 2013

N2 - Based on the electrosorption of ions by charged electrodes, the capacitive deionization method was considered for ion removal from saline water using mesoporous carbon electrodes. Mesoporous carbon was synthesized via a self-assembly method, with a narrow pore size distribution in the range of 6-10 nm. It was found that the rates of ion sorption and release by mesoporous carbon electrodes increase with an increase in the temperature of the solution. A drift in the conductivity was observed during electrosorption of Instant Ocean solutions, which may be explained as the result of competition between ions of different valence and size. The diffusion coefficient of ions during electrosorption was evaluated as a function of temperature, and a transport model coupled with an electrical-double-layer model was employed to calculate the mass of salt adsorbed by the electrodes. The calculated cumulative mass of salt captured in the electrical double layers of the electrodes was compared to the experimental data at different temperatures.

AB - Based on the electrosorption of ions by charged electrodes, the capacitive deionization method was considered for ion removal from saline water using mesoporous carbon electrodes. Mesoporous carbon was synthesized via a self-assembly method, with a narrow pore size distribution in the range of 6-10 nm. It was found that the rates of ion sorption and release by mesoporous carbon electrodes increase with an increase in the temperature of the solution. A drift in the conductivity was observed during electrosorption of Instant Ocean solutions, which may be explained as the result of competition between ions of different valence and size. The diffusion coefficient of ions during electrosorption was evaluated as a function of temperature, and a transport model coupled with an electrical-double-layer model was employed to calculate the mass of salt adsorbed by the electrodes. The calculated cumulative mass of salt captured in the electrical double layers of the electrodes was compared to the experimental data at different temperatures.

KW - Capacitive deionization

KW - Desalination

KW - Electrical double layer

KW - Electrosorption

KW - Temperature effects

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ER -

Influence of temperature on the electrosorption of ions from aqueous solutions using mesoporous carbon materials

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Keywords

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