skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Alternating-polarity operation for complete regeneration of electrochemical deionization system

Abstract

An electrically regeneratable battery of electrochemical cells for capacitive deionization (including electrochemical purification) and regeneration of electrodes is operated at alternate polarities during consecutive cycles. By polarizing the cells, ions are removed from the electrolyte and are held in the electric double layers formed at the carbon aerogel surfaces of the electrodes. As the electrodes of each cell of the battery are saturated with the removed ions, the battery is regenerated electrically at a reversed polarity from that during the deionization step of the cycle, thus significantly minimizing secondary wastes.

Inventors:
 [1];  [1]
  1. Livermore, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
874233
Patent Number(s):
6346187
Assignee:
The Regents of the University of California (Oakland, CA)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES
C - CHEMISTRY C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE C02F - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
alternating-polarity; operation; complete; regeneration; electrochemical; deionization; electrically; regeneratable; battery; cells; capacitive; including; purification; electrodes; operated; alternate; polarities; consecutive; cycles; polarizing; removed; electrolyte; held; electric; double; layers; formed; carbon; aerogel; surfaces; cell; saturated; regenerated; reversed; polarity; step; cycle; significantly; minimizing; secondary; wastes; electrochemical cell; capacitive deionization; /205/210/

Citation Formats

Tran, Tri D, and Lenz, David J. Alternating-polarity operation for complete regeneration of electrochemical deionization system. United States: N. p., 2002. Web.
Tran, Tri D, & Lenz, David J. Alternating-polarity operation for complete regeneration of electrochemical deionization system. United States.
Tran, Tri D, and Lenz, David J. Tue . "Alternating-polarity operation for complete regeneration of electrochemical deionization system". United States. https://www.osti.gov/servlets/purl/874233.
@article{osti_874233,
title = {Alternating-polarity operation for complete regeneration of electrochemical deionization system},
author = {Tran, Tri D and Lenz, David J},
abstractNote = {An electrically regeneratable battery of electrochemical cells for capacitive deionization (including electrochemical purification) and regeneration of electrodes is operated at alternate polarities during consecutive cycles. By polarizing the cells, ions are removed from the electrolyte and are held in the electric double layers formed at the carbon aerogel surfaces of the electrodes. As the electrodes of each cell of the battery are saturated with the removed ions, the battery is regenerated electrically at a reversed polarity from that during the deionization step of the cycle, thus significantly minimizing secondary wastes.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

Save / Share:

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