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Title: System and method for high efficiency electrochemical desalination

Abstract

The present disclosure relates to a capacitive deionization (CDI) system for desalinating salt water. The system may have a capacitor formed by spaced apart first and second electrodes, which enable a fluid flow containing salt water to pass either between them or through them. An input electrical power source is configured to generate an electrical forcing signal between the two electrodes. The electrical forcing signal represents a periodic signal including at least one of voltage or current, and which can be represented as a Fourier series. One component of the Fourier series is a constant, and a second component of the Fourier series is a sinusoidal wave of non-zero frequency which has the highest amplitude of the additive components of the Fourier series. The amplitude of the sinusoidal wave component is between 0.85 and 1.25 times the amplitude of the periodic signal.

Inventors:
; ; ;
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1771757
Patent Number(s):
10875792
Application Number:
16/418,487
Assignee:
Lawrence Livermore National Security, LLC (Livermore, CA)
Patent Classifications (CPCs):
C - CHEMISTRY C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE C02F - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
DOE Contract Number:  
AC52-07NA27344
Resource Type:
Patent
Resource Relation:
Patent File Date: 05/21/2019
Country of Publication:
United States
Language:
English

Citation Formats

Hawks, Steven, Stadermann, Michael, Santiago, Juan G., and Ramachandran, Ashwin. System and method for high efficiency electrochemical desalination. United States: N. p., 2020. Web.
Hawks, Steven, Stadermann, Michael, Santiago, Juan G., & Ramachandran, Ashwin. System and method for high efficiency electrochemical desalination. United States.
Hawks, Steven, Stadermann, Michael, Santiago, Juan G., and Ramachandran, Ashwin. Tue . "System and method for high efficiency electrochemical desalination". United States. https://www.osti.gov/servlets/purl/1771757.
@article{osti_1771757,
title = {System and method for high efficiency electrochemical desalination},
author = {Hawks, Steven and Stadermann, Michael and Santiago, Juan G. and Ramachandran, Ashwin},
abstractNote = {The present disclosure relates to a capacitive deionization (CDI) system for desalinating salt water. The system may have a capacitor formed by spaced apart first and second electrodes, which enable a fluid flow containing salt water to pass either between them or through them. An input electrical power source is configured to generate an electrical forcing signal between the two electrodes. The electrical forcing signal represents a periodic signal including at least one of voltage or current, and which can be represented as a Fourier series. One component of the Fourier series is a constant, and a second component of the Fourier series is a sinusoidal wave of non-zero frequency which has the highest amplitude of the additive components of the Fourier series. The amplitude of the sinusoidal wave component is between 0.85 and 1.25 times the amplitude of the periodic signal.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {12}
}

Works referenced in this record:

Charging and Transport Dynamics of a Flow-Through Electrode Capacitive Deionization System
journal, December 2017


Capacitive Deionization Technology™: An alternative desalination solution
journal, November 2005


Membrane capacitive deionization
journal, January 2010


New testing procedures of a capacitive deionization reactor
journal, January 2013


Hybrid CV-CC operation of capacitive deionization in comparison with constant current and constant voltage
journal, January 2016


Dynamic Adsorption/Desorption Process Model for Capacitive Deionization
journal, March 2009


Self similarities in desalination dynamics and performance using capacitive deionization
journal, September 2018


Membrane Capacitive Deionization with Constant Current vs Constant Voltage Charging: Which Is Better?
journal, February 2018


New Operational Modes to Increase Energy Efficiency in Capacitive Deionization Systems
journal, May 2016


A one-dimensional model for water desalination by flow-through electrode capacitive deionization
journal, August 2017


Performance metrics for the objective assessment of capacitive deionization systems
journal, April 2019


Quantifying the flow efficiency in constant-current capacitive deionization
journal, February 2018


Energy breakdown in capacitive deionization
journal, November 2016


Water desalination via capacitive deionization: what is it and what can we expect from it?
journal, January 2015


On porous electrodes in electrolyte solutions
journal, October 1963


Desalination using capacitive deionization at constant current
journal, November 2013


Salt rejection in flow-between capacitive deionization devices
journal, July 2018


Desalting by Means of Porous Carbon Electrodes
journal, January 1971


Two-Dimensional Porous Electrode Model for Capacitive Deionization
journal, October 2015


Enhanced charge efficiency and reduced energy use in capacitive deionization by increasing the discharge voltage
journal, May 2015