Simulation of Electrodialysis with Bipolar Membranes: Estimation of Process Performance and Energy Consumption

Wang, Yaoming; Wang, Anlei; Zhang, Xu; Xu, Tongwen

doi:10.1021/ie200467s

Cited by 47 publications

(26 citation statements)

References 26 publications

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“…kWh/kg NaOH). Only, recently, Wang et al [38], developed a mathematical model of a typical three-compartment EDBM process to calculate the energy consumption and total cost of the process. With an increase in the current density, the energy consumption of the process increases and the total process cost decreases at first and then increases gradually with a minimum cost value at a given current intensity.…”

Section: Concentrated By Edmentioning

confidence: 99%

Integration of monopolar and bipolar electrodialysis for valorization of seawater reverse osmosis desalination brines: Production of strong acid and base

et al. 2016

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Water scarcity in the Mediterranean basin has been solved by using seawater desalination reverse osmosis technology (SWD-RO). This technology produces brine which is discharged back into the sea resulting in an environmental impact on marine ecosystems. Under the circular economy approach, the aim of this work is to recover resources from NaCl-rich brine (~60-70 g/L), e.g. in the form of NaOH and HCl, by integration of two ion exchange-based membrane technologies and quantify the electrical energy consumption. Electrodialysis (ED) incorporating monovalent selective cation exchange membranes as divalent ions purification and concentration of the NaCl present in the SWD-RO brine, was integrated with bipolar membrane ED (EDBM) to produce NaOH and HCl. Current densities of 0.30–0.40 kA/m2 at two temperature ranges simulating different seawater temperature regimes (15-18 ºC and 22-28ºC) were tested and a pure NaCl solution was used as starting concentrate stream. NaCl-rich brines with 100 or 200 gNaCl/L were obtained by ED and then introduced in the EDBM stack producing HCl and NaOH up to 2 M, depending on the initial concentrations. A minimum energy consumption of 1.7 kWh/kgNaOH was calculated when working by EDBM with initial concentrations of 104 g NaCl/L and 0.24 M HCl and NaOH.Peer ReviewedPostprint (author's final draft

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Section: Concentrated By Edmentioning

confidence: 99%

Integration of monopolar and bipolar electrodialysis for valorization of seawater reverse osmosis desalination brines: Production of strong acid and base

et al. 2016

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“…To provide some references for the industrialization of this CED technology, the process economy of this process was estimated [23,24], and the results are shown in Table 2. It should be noted that the process was estimated under the operating voltage of 10 V and MSM of 20%.…”

Section: Process Economymentioning

confidence: 99%

Purification of Methylsulfonylmethane from Mixtures Containing Salt by Conventional Electrodialysis

et al. 2020

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Methylsulfonylmethane (MSM) is one of the main sources of sulfur for living bodies, but it is hard to obtain as a pure compound. Conventional electrodialysis (CED) is a mature technology that can be used for the separation and purification of biochemical products. In this study, the purification of MSM from mixtures containing salt was performed by CED. The effects of operating conditions such as operation voltage drop, feed MSM concentration, and electrolyte salt concentration on the separation performances were investigated. The results showed that the current efficiency reached 74.0%, and the energy consumption could be 12.3 Wh·L−1. As for the recovery rate and desalination rate, the highest recovery rate could be 97.4%, and the desalination rate was 98.5%. Based on process energy consumption calculation, the total cost of the whole process was estimated at only 2.34 $·t−1. Thus, CED is highly efficient and cost-effective for the separation and purification of MSM.

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“…Taking the ED process for organic acids production 36,37 Similarly, energy consumption of the ED/EED coupling process may be decreased from 2.25 to lower than 1.0 kW h kg −1 . Though the value is still much higher than that of the precipitation step in the Bayer process (0.064 kW h kg −1 ), the higher energy consumption should be at least partly offset by the increased production efficiency.…”

Section: Coupling Processmentioning

confidence: 99%

Optimized Process for Separating NaOH from Sodium Aluminate Solution: Coupling of Electrodialysis and Electro-Electrodialysis

Yan

2015

Ind. Eng. Chem. Res.

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Most bauxite-produced alumina is obtained by the Bayer process, but the production efficiency is limited by the slow gibbsite crystal growth due to the high concentration of NaOH in sodium aluminate solution. Here electrodialysis (ED) and electro-electrodialysis (EED) are coupled to separate NaOH from the sodium aluminate solution so as to enhance the gibbsite crystal growth rate and achieve high alumina production efficiency. The ED or EED process is also investigated before the coupling process to find the optimal operating conditions. The ED process indicates that the optimized current density is in the range of 45−60 mA cm −2 and the optimal membranes are CMV/AMV. The current density of 60 mA cm −2 can achieve a high recovery ratio (η OH − 92.6%), low energy consumption (2.38 kW h kg −1 ), but a relatively high Al(OH) 4 − leakage ratio (η Al(OH)4 − 15.1%). The EED process indicates that with the optimized current density of 30 mA cm −2 and membrane CMV, the η Al(OH)4 − can be "zero" and the energy consumption can be as low as 2.07 kW h kg −1 , but the treatment capability is low since OH − ions cannot be recovered directly and a single cation exchange membrane is used. The coupling process can combine the advantages of ED and EED, so that the η OH − can keep a high value of 90.9%, the η Al(OH)4 − decreases to a low value of ∼5%, and the energy consumption remains low at 2.25 kW h kg −1 . Overall, the coupling process of ED and EED is an excellent method to separate NaOH from the sodium aluminate solution.

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Simulation of Electrodialysis with Bipolar Membranes: Estimation of Process Performance and Energy Consumption

Cited by 47 publications

References 26 publications

Integration of monopolar and bipolar electrodialysis for valorization of seawater reverse osmosis desalination brines: Production of strong acid and base

Integration of monopolar and bipolar electrodialysis for valorization of seawater reverse osmosis desalination brines: Production of strong acid and base

Purification of Methylsulfonylmethane from Mixtures Containing Salt by Conventional Electrodialysis

Optimized Process for Separating NaOH from Sodium Aluminate Solution: Coupling of Electrodialysis and Electro-Electrodialysis

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