Performance comparison and energy consumption analysis of capacitive deionization and membrane capacitive deionization processes

Zhao, Yajing; Wang, Yue; Wang, Ruguo; Wu, Yafei; Xu, Shichang; Wang, Jixiao

doi:10.1016/j.desal.2013.06.009

Cited by 158 publications

(89 citation statements)

References 20 publications

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“…As regeneration occurs at zero voltage, some undesired coion adsorption happens during this desorption step. Consequently, when the cell voltage is reapplied during the subsequent adsorption step, an abrupt repulsion of these co-ions occurs, which then results in a repulsion peak (Zhao et al 2013). The extent of co-ion adsorption is greatest for KCl consistent with the normalized capacity and its small hydrated radius.…”

Section: Feed Solutions Containing a Single Saltmentioning

confidence: 96%

A comparison of multicomponent electrosorption in capacitive deionization and membrane capacitive deionization

et al. 2018

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In this study, the desalination performance of Capacitive Deionization (CDI) and Membrane Capacitive Deionization (MCDI) was studied for a wide range of salt compositions. The comprehensive data collection for monovalent and divalent ions used in this work enabled us to understand better the competitive electrosorption of these ions both with and without ion-exchange membranes (IEMs). As expected, MCDI showed an enhanced salt adsorption and charge efficiency in comparison with CDI. However, the different electrosorption behavior of the former reveals that ion transport through the IEMs is a significant rate-controlling step in the desalination process. A sharper desorption peak is observed for divalent ions in MCDI, which can be attributed to a portion of these ions being temporarily stored within the IEMs, thus they are the first to leave the cell upon discharge. In addition to salt concentration, we monitored the pH of the effluent stream in CDI and MCDI and discuss the potential causes of these fluctuations. The dramatic pH change over one adsorption and desorption cycle in CDI (pH range of 3.5-10.5) can be problematic in a feed water containing components prone to scaling. The pH change, however, was much more limited in the case of MCDI for all salts.

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Section: Feed Solutions Containing a Single Saltmentioning

confidence: 96%

A comparison of multicomponent electrosorption in capacitive deionization and membrane capacitive deionization

et al. 2018

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“…In a pilot scale CDI study, Mossad and Zou [ 55 ] proposed a minimum energy consumption of 1.85 kWh m −3 (10 kJ g −1 ) for CDI at the highest flow rate. In lab-scale tests, MCDI has been shown to provide lower energy consumption, below 1 kWh m −3 or 6 kJ g −1 [ 44 , 49 ]. Dlugolecki et al [ 56 ] were able to achieve a value of 0.26 kWh m −3 by recovering the energy during the discharge part of the MCDI cycle.…”

Section: MCDI Performance Parametersmentioning

confidence: 99%

“… Charge and current efficiencies as a function of feed salt concentration for a range of recent studies [ 25 , 28 , 29 , 40 , 42 , 43 , 44 , 45 , 52 , 53 , 54 ]. …”

Section: Figurementioning

confidence: 99%

The Role of Ion Exchange Membranes in Membrane Capacitive Deionisation

et al. 2017

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Ion-exchange membranes (IEMs) are unique in combining the electrochemical properties of ion exchange resins and the permeability of a membrane. They are being used widely to treat industrial effluents, and in seawater and brackish water desalination. Membrane Capacitive Deionisation (MCDI) is an emerging, energy efficient technology for brackish water desalination in which these ion-exchange membranes act as selective gates allowing the transport of counter-ions toward carbon electrodes. This article provides a summary of recent developments in the preparation, characterization, and performance of ion exchange membranes in the MCDI field. In some parts of this review, the most relevant literature in the area of electrodialysis (ED) is also discussed to better elucidate the role of the ion exchange membranes. We conclude that more work is required to better define the desalination performance of the proposed novel materials and cell designs for MCDI in treating a wide range of feed waters. The extent of fouling, the development of cleaning strategies, and further techno-economic studies, will add value to this emerging technique.

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“…Membrane capacitive deionization shows adsorption capacity much higher than capacitive deionization without membrane. Also energy consumption was reduced providing an economical advantage of membrane capacitive deionization [28].…”

Section: Introductionmentioning

confidence: 99%

Polymer coated Capacitive Deionization Electrode for Desalination: A mini review

Gaikwad¹,

Balomajumder²

2016

Electrochemical Energy Technology

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This mini review deals with a recently developing water purification technology, i.e. capacitive deionization. It presents the current progress achieved with polymer coated electrodes in capacitive deionization for desalination. The introduction covers capacitive deionization, application of polymer or polymer composite in capacitive deionization electrode, comparative study and discussion on fabrication of electrode. This paper aims at indicating novel research prospects in capacitive deionization technology for desalination.

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Performance comparison and energy consumption analysis of capacitive deionization and membrane capacitive deionization processes

Cited by 158 publications

References 20 publications

A comparison of multicomponent electrosorption in capacitive deionization and membrane capacitive deionization

A comparison of multicomponent electrosorption in capacitive deionization and membrane capacitive deionization

The Role of Ion Exchange Membranes in Membrane Capacitive Deionisation

Polymer coated Capacitive Deionization Electrode for Desalination: A mini review

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