Direct energy recovery system for membrane capacitive deionization

Kang, Junil; Kim, Taeyoung; Shin, Hojoon; Lee, Jiho; Park, Yong Ha; Yoon, Jeyong

doi:10.1016/j.desal.2016.07.025

Cited by 102 publications

(59 citation statements)

References 26 publications

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“…Consumed energy during the charging step could be partially recovered during the discharging step, as encountered in energy storage devices. CDI is a considerably more energy-efficient process than other desalination technologies [36,37].…”

Section: Basic Principle and Operational Featuresmentioning

confidence: 99%

“…For the charging step, the system could be operated by either the constant current (CC) or the constant voltage (CV). Note that the CV mode is widely used in CDI operation due to the practical advantages such as easy to execute and fast ion removal rate, whereas the CC mode results in the consistent quality of desalinated water using less energy [36]. During the discharging steps, there are three types of operational modes, such as reversed current, zero voltage (short-circuit), and reversed voltage modes.…”

Section: Operational Modementioning

confidence: 99%

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Short Review of Multichannel Membrane Capacitive Deionization: Principle, Current Status, and Future Prospect

et al. 2020

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Capacitive deionization (CDI) has gained a lot of attention as a promising water desalination technology. Among several CDI architectures, multichannel membrane CDI (MC-MCDI) has recently emerged as one of the most innovative systems to enhance the ion removal capacity. The principal feature of MC-MCDI is the independently controllable electrode channels, providing a favorable environment for the electrodes and enhancing the desalination performance. Furthermore, MC-MCDI has been studied in various operational modes, such as concentration gradient, reverse voltage discharging for semi-continuous process, and increase of mass transfer. Furthermore, the system configuration of MC-MCDI has been benchmarked for the extension of the operation voltage and sustainable desalination. Given the increasing interest in MC-MCDI, a comprehensive review is necessary to provide recent research efforts and prospects for further development of MC-MCDI. Therefore, this review actively addresses the major principle and operational features of MC-MCDI along with conventional CDI for a better understanding of the MC-MCDI system. In addition, the innovative applications of MC-MCDI and their notable improvements are also discussed. Finally, this review briefly mentions the major challenges of MC-MCDI as well as proposes future research directions for further development of MC-MCDI as scientific and industrial desalination technologies.

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Section: Basic Principle and Operational Featuresmentioning

confidence: 99%

Section: Operational Modementioning

confidence: 99%

Short Review of Multichannel Membrane Capacitive Deionization: Principle, Current Status, and Future Prospect

et al. 2020

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“…Thus, by employing energy recovery technology with an efficiency of 100%, 77% of the energy consumption during charging can be recovered during Energy consumption and resistance identification 155 discharge. We note that an energy recovery efficiency of 100% is in reality too optimistic, but efficiencies in the range of 50-80% are reported in literature [135,156,191]. This finding implies that, in order to reduce energy costs of desalination, developing efficient energy recovery technology will have a larger impact than reducing resistances.…”

Section: Donnan Potentials Membrane Interfacesmentioning

confidence: 54%

“…Note that this choice does not need to be made for steady state operation of CDI with flowing electrodes, but is only necessary for cyclic processes. For carbon electrodes (which we consider from this point onward), in literature it is reported that CC operation leads to a lower energy consumption than CV operation [36,97,[153][154][155][156]. Kang et al [153] show that CC-CDI consumes approximately 30% less energy than CV-CDI for identical electronic charge storage or identical ion removal, without considering energy recovery.…”

Section: Introductionmentioning

confidence: 99%

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Desalination with porous electrodes : Mechanisms of ion transport and adsorption

Dykstra¹

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Supercapacitors in the Light of Solid Waste and Energy Management: A Review

Dutta

Mahanta

Banerjee

2020

Advanced Sustainable Systems

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Supercapacitors store electrical energy on the basis of electrostatic attraction between opposite charges as a result of the formation of an electric double layer (EDL) at the electrolyte/electrode interface. Carbon-derived materials are commonly used to fabricate supercapacitor electrodes owing to their high electrical conductivity, high capacitance, excellent porosity, good electrochemical stability, and large specific surface area. [131-136] Predominantly, these materials include carbon nanotubes (CNTs), graphene, carbon spheres, hollow carbon spheres, carbon nanoparticles (CNPs), etc. [62,137-145] Nevertheless, they fail to demonstrate the desirable performance in practical applications after a certain threshold owing to their short durability and low energy density. Although, metal-organic frameworks (MOFs) have proven to be better electrode candidates in certain aspects, [142,143,146-148] however, these materials incur high cost, low yield of porous carbon, high consumption of metallic nitrate, [62] and hence higher waste generation. Due to the rising concerns of waste production and its management and hence the need for sustainable and cheap resources, reusing and/or converting waste from various sources such as industrial, agricultural, food, and spent electronic devices efficiently into usable carbon has attracted much interest since recently.

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Direct energy recovery system for membrane capacitive deionization

Cited by 102 publications

References 26 publications

Short Review of Multichannel Membrane Capacitive Deionization: Principle, Current Status, and Future Prospect

Short Review of Multichannel Membrane Capacitive Deionization: Principle, Current Status, and Future Prospect

Desalination with porous electrodes : Mechanisms of ion transport and adsorption

Supercapacitors in the Light of Solid Waste and Energy Management: A Review

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