Multi-physical modelling of reverse electrodialysis

Gurreri, Luigi; Battaglia, Giuseppe; Tamburini, Alessandro; Cipollina, Andrea; Micale, G.; Ciofalo, Michele

doi:10.1016/j.desal.2017.09.006

Cited by 53 publications

(25 citation statements)

References 41 publications

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“…Despite the fact that the concept of RED technology was reported long ago in 1954 [16], the most remarkable trend of research advances has been recorded from 2007 onwards [42,49]. Figure 3 shows the number of papers on RED published yearly over the past decade, and the key research topics so far have covered process analysis, testing and optimization [39,41,[70][71][72][73][74][75][76], stack design [77][78][79][80][81], membrane design and development [82][83][84][85], fouling [32,86] modeling and simulations [87][88][89][90][91][92][93][94][95][96][97][98], hybrid applications [38,47,50,51,[99][100][101][102] and extensions to energy storage as a flow battery [103,104]. Moreover, RED operabilit...…”

Section: Technologies For Salinity Gradient Powermentioning

confidence: 99%

Progress and prospects in reverse electrodialysis for salinity gradient energy conversion and storage

Tufa

Pawlowski

Veerman³

et al. 2018

Applied Energy

238

157

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Salinity gradient energy is currently attracting growing attention among the scientific community as a renewable energy source. In particular, Reverse Electrodialysis (RED) is emerging as one of the most promising membrane-based technologies for renewable energy generation by mixing two solutions of different salinity. This work presents a critical review of the most significant achievements in RED, focusing on membrane development, stack design, fluid dynamics, process optimization, fouling and potential applications. Although RED technology is mainly investigated for energy generation from river water/seawater, the opportunities for the use of concentrated brine are considered as well, driven by benefits in terms of higher power density and mitigation of adverse environmental effects related to brine disposal. Interesting extensions of the applicability of RED for sustainable production of water and hydrogen when complemented by reverse osmosis, membrane distillation, bioelectrochemical systems and water electrolysis technologies are also discussed, along with the possibility to use it as an energy storage device. The main hurdles to market implementation, predominantly related to unavailability of high performance, stable and low-cost membrane materials, are outlined. A techno-economic analysis based on the available literature data is also performed and critical research directions to facilitate commercialization of RED are identified.

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Section: Technologies For Salinity Gradient Powermentioning

confidence: 99%

Progress and prospects in reverse electrodialysis for salinity gradient energy conversion and storage

Tufa

Pawlowski

Veerman³

et al. 2018

Applied Energy

238

157

View full text Add to dashboard Cite

show abstract

“…In electro-membrane processes such as electrodialysis (ED) [1] and reverse electrodialysis (RED) [2], performance predictions are usually based on simulation models or empirical correlations in which the geometric configurations of the solution-filled channels and of the ion exchange membranes are assumed to be the nominal (undeformed) one [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Pressure-Induced Deformation of Pillar-Type Profiled Membranes and Its Effects on Flow and Mass Transfer

et al. 2019

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In electro-membrane processes, a pressure difference may arise between solutions flowing in alternate channels. This transmembrane pressure (TMP) causes a deformation of the membranes and of the fluid compartments. This, in turn, affects pressure losses and mass transfer rates with respect to undeformed conditions and may result in uneven flow rate and mass flux distributions. These phenomena were analyzed here for round pillar-type profiled membranes by integrated mechanical and fluid dynamics simulations. The analysis involved three steps: (1) A conservatively large value of TMP was imposed, and mechanical simulations were performed to identify the geometry with the minimum pillar density still able to withstand this TMP without collapsing (i.e., without exhibiting contacts between opposite membranes); (2) the geometry thus identified was subject to expansion and compression conditions in a TMP interval including the values expected in practical applications, and for each TMP, the corresponding deformed configuration was predicted; and (3) for each computed deformed configuration, flow and mass transfer were predicted by computational fluid dynamics. Membrane deformation was found to have important effects; friction and mass transfer coefficients generally increased in compressed channels and decreased in expanded channels, while a more complex behavior was obtained for mass transfer coefficients.

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“…U-shaped channels with halfway features are almost common in large units, similarly to tortuous path layouts, while sheet flow channels are more used for small stacks. Membranes with built-in profiles avoid the use of net spacers [15,16], but they have been used only for theoretical or experimental studies [24][25][26][27][28].…”

Section: Working Principle and Design/operating Features Of Ed Processesmentioning

confidence: 99%

Electrodialysis Applications in Wastewater Treatment for Environmental Protection and Resources Recovery: A Systematic Review on Progress and Perspectives

et al. 2020

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This paper presents a comprehensive review of studies on electrodialysis (ED) applications in wastewater treatment, outlining the current status and the future prospect. ED is a membrane process of separation under the action of an electric field, where ions are selectively transported across ion-exchange membranes. ED of both conventional or unconventional fashion has been tested to treat several waste or spent aqueous solutions, including effluents from various industrial processes, municipal wastewater or salt water treatment plants, and animal farms. Properties such as selectivity, high separation efficiency, and chemical-free treatment make ED methods adequate for desalination and other treatments with significant environmental benefits. ED technologies can be used in operations of concentration, dilution, desalination, regeneration, and valorisation to reclaim wastewater and recover water and/or other products, e.g., heavy metal ions, salts, acids/bases, nutrients, and organics, or electrical energy. Intense research activity has been directed towards developing enhanced or novel systems, showing that zero or minimal liquid discharge approaches can be techno-economically affordable and competitive. Despite few real plants having been installed, recent developments are opening new routes for the large-scale use of ED techniques in a plethora of treatment processes for wastewater.

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Multi-physical modelling of reverse electrodialysis

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Cited by 53 publications

References 41 publications

Progress and prospects in reverse electrodialysis for salinity gradient energy conversion and storage

Progress and prospects in reverse electrodialysis for salinity gradient energy conversion and storage

Pressure-Induced Deformation of Pillar-Type Profiled Membranes and Its Effects on Flow and Mass Transfer

Electrodialysis Applications in Wastewater Treatment for Environmental Protection and Resources Recovery: A Systematic Review on Progress and Perspectives

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