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Title: Method and apparatus for capacitive deionization and electrochemical purification and regeneration of electrodes

Abstract

An electrically regeneratable electrochemical cell (30) for capacitive deionization and electrochemical purification and regeneration of electrodes includes two end plates (31, 32), one at each end of the cell (30). A new regeneration method is applied to the cell (30) which includes slowing or stopping the purification cycle, electrically desorbing contaminants and removing the desorbed contaminants. The cell (30) further includes a plurality of generally identical double-sided intermediate electrodes (37-43) that are equidistally separated from each other, between the two end electrodes (35, 36). As the electrolyte enters the cell, it flows through a continuous open serpentine channel (65-71) defined by the electrodes, substantially parallel to the surfaces of the electrodes. By polarizing the cell (30), ions are removed from the electrolyte and are held in the electric double layers formed at the carbon aerogel surfaces of the electrodes. The cell (30) is regenerated electrically to desorb such previously removed ions.

Inventors:
 [1];  [2];  [3]
+ Show Inventor Affiliations
  1. Livermore, CA
  2. Tracy, CA
  3. Manteca, CA
Issue Date:
Research Org.:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
OSTI Identifier:
874086
Patent Number(s):
6309532
Assignee:
Regents of the University of California (Oakland, CA)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
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DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; apparatus; capacitive; deionization; electrochemical; purification; regeneration; electrodes; electrically; regeneratable; cell; 30; plates; 31; 32; applied; slowing; stopping; cycle; desorbing; contaminants; removing; desorbed; plurality; identical; double-sided; intermediate; 37-43; equidistally; separated; 35; 36; electrolyte; enters; flows; continuous; serpentine; channel; 65-71; defined; substantially; parallel; surfaces; polarizing; removed; held; electric; double; layers; formed; carbon; aerogel; regenerated; desorb; previously; electrochemical cell; capacitive deionization; /205/204/

Citation Formats

Tran, Tri D, Farmer, Joseph C, and Murguia, Laura. Method and apparatus for capacitive deionization and electrochemical purification and regeneration of electrodes. United States: N. p., 2001. Web.
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Tran, Tri D, Farmer, Joseph C, & Murguia, Laura. Method and apparatus for capacitive deionization and electrochemical purification and regeneration of electrodes. United States.
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Tran, Tri D, Farmer, Joseph C, and Murguia, Laura. Mon . "Method and apparatus for capacitive deionization and electrochemical purification and regeneration of electrodes". United States. https://www.osti.gov/servlets/purl/874086.
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@article{osti_874086,
title = {Method and apparatus for capacitive deionization and electrochemical purification and regeneration of electrodes},
author = {Tran, Tri D and Farmer, Joseph C and Murguia, Laura},
abstractNote = {An electrically regeneratable electrochemical cell (30) for capacitive deionization and electrochemical purification and regeneration of electrodes includes two end plates (31, 32), one at each end of the cell (30). A new regeneration method is applied to the cell (30) which includes slowing or stopping the purification cycle, electrically desorbing contaminants and removing the desorbed contaminants. The cell (30) further includes a plurality of generally identical double-sided intermediate electrodes (37-43) that are equidistally separated from each other, between the two end electrodes (35, 36). As the electrolyte enters the cell, it flows through a continuous open serpentine channel (65-71) defined by the electrodes, substantially parallel to the surfaces of the electrodes. By polarizing the cell (30), ions are removed from the electrolyte and are held in the electric double layers formed at the carbon aerogel surfaces of the electrodes. The cell (30) is regenerated electrically to desorb such previously removed ions.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2001},
month = {Mon Jan 01 00:00:00 EST 2001}
}
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Works referenced in this record:

Continuous Quantitative Electrolysis.
journal, June 1964

Electrosorption of Chromium Ions on Carbon Aerogel Electrodes as a Means of Remediating Ground Water
journal, March 1997

Modified graphites for chelation and ion exchange
journal, December 1978

Capacitive deionization of NH4ClO4 solutions with carbon aerogel electrodes
journal, October 1996

Electrochromatography—a preliminary study of the effect of applied potential on a carbonaceous chromatographic column
journal, January 1984

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