This work address to the water desalination using capacitive deionization (CDI) technology.  CDI is an electrochemical process that operates by adsorbing ions in the double layer formed at the electrodes by the application of a potential difference.  In this work, Hollingsworth & Vose carbon electrodes (5 cm x 6 cm) were used as cathode and anode in a batch CDI flow cell to remove sodium chloride from an aqueous solution.  The effect of initial concentration, flow rate and operational mode were study.  Regarding to the operational mode, we studied the desalination process operated under constant voltage and constant current. After each deionization cycle the electrodes were regenerated by short circuiting the system. NaCl concentration was followed by measuring the electrolyte conductivity along the electrosorption process.  The results of electrosorption and regeneration were compared in terms of their kinetics, charge efficiency and energy consumption.

Capacitive deionization for water desalination: Influence of operational mode on kinetics, charge efficiency and energy consumption

245th National Meeting (2013)

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