Bipolar membrane technology and its applications

Franken, Tony

doi:10.1016/s0958-2118(00)80212-8

Cited by 26 publications

(14 citation statements)

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“…(2014) [1][2][3][4][5][6][7][8][9] www.deswater.com doi: 10.1080/19443994.2014.980972 made from certain types of cement. Aside from this, biological treatment of sulfate-rich wastewater is rather unpopular because of the production of H 2 S under anaerobic conditions.…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

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Recovery of H2SO4 and NaOH from Na2SO4 by electrodialysis with heterogeneous bipolar membrane

Kroupa

Kinčl

Cakl

2015

Desalination and Water Treatment

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A B S T R A C TElectrodialysis (ED) with heterogeneous bipolar membranes (BPMs) was studied experimentally on a laboratory scale in order to examine the recovery of the sodium sulfate solution into sulfuric acid and sodium hydroxide. The capacity of the system was evaluated in terms of its dependence on membrane configuration, product concentration, temperature, and circulation flow rate. A preliminary economic evaluation of ED with a heterogeneous BPM in a uranium ore mining wastewater treatment plant was also carried out. This process is primarily used in cases where the purity of the sulfuric acid and sodium hydroxide recycled does not play a significant role and the high costs of the homogeneous BPMs negatively affect the economy.

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Section: Desalination and Water Treatmentmentioning

confidence: 99%

“…The process design is closely related to that of the conventional ED using the sheet flow stack concept. However, because of the significantly higher voltage drop across a cell unit, only up to several dozen repeating cell units are placed between two electrodes in a stack [8].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Recovery of H2SO4 and NaOH from Na2SO4 by electrodialysis with heterogeneous bipolar membrane

Kroupa

Kinčl

Cakl

2015

Desalination and Water Treatment

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“…Amphoteric membranes, developed by radiation grafting, are suggested to reduce the net vanadium flux and hence have been proposed for minimizing the capacity loss compared to commonly used anion exchange membranes (AEMs) and cation exchange membranes (CEMs) [13][14][15]. In addition, bifunctional ion conducting (bipolar) membranes have been developed [16,17]. Mechanically, reduction of capacity decay by an electrolyte-reflow method was proposed [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Novel Approaches for Solving the Capacity Fade Problem during Operation of a Vanadium Redox Flow Battery

Bhattarai

Ghimire

Whitehead³

et al. 2018

Batteries

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The vanadium redox flow battery (VRFB) is one of the most mature and commercially available electrochemical technologies for large-scale energy storage applications. The VRFB has unique advantages, such as separation of power and energy capacity, long lifetime (>20 years), stable performance under deep discharge cycling, few safety issues and easy recyclability. Despite these benefits, practical VRFB operation suffers from electrolyte imbalance, which is primarily due to the transfer of water and vanadium ions through the ion-exchange membranes. This can cause a cumulative capacity loss if the electrolytes are not rebalanced. In commercial systems, periodic complete or partial remixing of electrolyte is performed using a by-pass line. However, frequent mixing impacts the usable energy and requires extra hardware. To address this problem, research has focused on developing new membranes with higher selectivity and minimal crossover. In contrast, this study presents two alternative concepts to minimize capacity fade that would be of great practical benefit and are easy to implement: (1) introducing a hydraulic shunt between the electrolyte tanks and (2) having stacks containing both anion and cation exchange membranes. It will be shown that the hydraulic shunt is effective in passively resolving the continuous capacity loss without detrimentally influencing the energy efficiency. Similarly, the combination of anion and cation exchange membranes reduced the net electrolyte flux, reducing capacity loss. Both approaches work efficiently and passively to reduce capacity fade during operation of a flow battery system.

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“…Since the 1980s, the effective investigations on the mechanism, membrane structure, materials and preparation process result in significant improvement on the [1][2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Preparation of a bipolar membrane by photografting polymerization

Yang

Zhang

2008

Front. Chem. China

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A single-sheet bipolar membrane was synthesized via photografting polymerization of an acrylic acid cation exchange layer onto the surface of a commercial homogeneous anion exchange membrane with benzophenone (BP) as the main initiator, diphenyl (2,4,6-trimethylbenzoyl)-phosphine oxide (TPO) and 2-hydroxy-2-methyl-1-phenyl-1-propanone (1173) as coinitiators and divinylbenzene (DVB) or neopentylene glycol diacrylate (NPGDA) as crosslinking agent. It was found that when benzophenone was used as single initiator and the crosslink agent is absent, the grafting degree (D g ) increases with the prolongation of irradiation time. The grafting degree reaches a maximum at 60 seconds reaction time when the crosslinking agent is added, and the grafting degree is higher when using NPGDA instead of DVB as crosslinking agent. The grafting degree increases as the composite initiator system is used. When polymerization was initiated by BP and TPO, and the dosage of NPGDA was 2.5% mol concentration of monomer, the grafting degree reaches 30.1%.

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Bipolar membrane technology and its applications

Cited by 26 publications

References 0 publications

Recovery of H2SO4 and NaOH from Na2SO4 by electrodialysis with heterogeneous bipolar membrane

Recovery of H2SO4 and NaOH from Na2SO4 by electrodialysis with heterogeneous bipolar membrane

Novel Approaches for Solving the Capacity Fade Problem during Operation of a Vanadium Redox Flow Battery

Preparation of a bipolar membrane by photografting polymerization

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