Electrochemical Performance Evaluation of Bipolar Membrane Using Poly(phenylene oxide) for Water Treatment System

This study describes the use of poly(phenylene oxide) polymer-based ion-exchange polymers, polystyrene-based ion-exchange particles and a porous support for fabricating bipolar membranes and the results of an assessment of the applicability of these materials to water splitting. In order to achieve good mechanical as well as good ion-exchange properties, bipolar membranes were prepared by laminating poly(phenylene oxide) and polystyrene based ion-exchange membranes with a sulfonated polystyrene-block-(ethylene-ran-butylene)-block-polystyrene) (S-SEBS) modified interface. PE pore-supported ion-exchange membranes were also used as bipolar membranes. The tensile strength was 13.21 MPa for the bipolar membrane which utilized only a cation/anion-exchange membrane. When ion-exchange nanoparticles were introduced for high efficiency, a reduction in the tensile strength to 6.81 MPa was observed. At the same time, bipolar membrane in the form of a composite membrane using PE support exhibited the best tensile strength of 32.41 MPa. To confirm the water-splitting performance, an important factor for a bipolar membrane, pH changes over a period of 20 min were also studied. During water slitting using CA-P-PE-BPM, the pH at the CEM part and the AEM part changed from 5.4 to 4.18 and from 5.4 to 5.63, respectively.

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Water Splitting and Transport of Ions in Electromembrane System with Bilayer Ion-Exchange Membrane

Membranes ◽

10.3390/membranes10110346 ◽

2020 ◽

Vol 10 (11) ◽

pp. 346 ◽

Cited By ~ 1

Author(s):

Stanislav Melnikov ◽

Denis Bondarev ◽

Elena Nosova ◽

Ekaterina Melnikova ◽

Victor Zabolotskiy

Keyword(s):

Ion Exchange ◽

Water Splitting ◽

Surface Film ◽

Effective Rate Constant ◽

Effective Rate ◽

Limiting Current ◽

Ion Exchange Membranes ◽

Bipolar Membranes ◽

The Matrix ◽

Exchange Membrane

Bilayer ion-exchange membranes are mainly used for separating single and multiply charged ions. It is well known that in membranes in which the layers have different charges of the ionogenic groups of the matrix, the limiting current decreases, and the water splitting reaction accelerates in comparison with monolayer (isotropic) ion-exchange membranes. We study samples of bilayer ion-exchange membranes with very thin cation-exchange layers deposited on an anion-exchange membrane-substrate in this work. It was revealed that in bilayer membranes, the limiting current’s value is determined by the properties of a thin surface film (modifying layer). A linear regularity of the dependence of the non-equilibrium effective rate constant of the water-splitting reaction on the resistance of the bipolar region, which is valid for both bilayer and bipolar membranes, has been revealed. It is shown that the introduction of the catalyst significantly reduces the water-splitting voltage, but reduces the selectivity of the membrane. It is possible to regulate the fluxes of salt ions and water splitting products (hydrogen and hydroxyl ions) by changing the current density. Such an ability makes it possible to conduct a controlled process of desalting electrolytes with simultaneous pH adjustment.

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Effect of the type of ion exchange membrane on performance, ion transport, and pH in biocatalyzed electrolysis of wastewater

Water Science & Technology ◽

10.2166/wst.2008.043 ◽

2008 ◽

Vol 57 (11) ◽

pp. 1757-1762 ◽

Cited By ~ 134

Author(s):

R. A. Rozendal ◽

T. H. J. A. Sleutels ◽

H. V. M. Hamelers ◽

C. J. N. Buisman

Keyword(s):

Ion Exchange ◽

Ion Exchange Membrane ◽

Transport Numbers ◽

Ion Exchange Membranes ◽

Bipolar Membrane ◽

Electrolysis Cells ◽

Ph Increase ◽

A Charge ◽

Exchange Membrane ◽

Biocatalyzed Electrolysis

Previous studies have shown that the application of cation exchange membranes (CEMs) in bioelectrochemical systems running on wastewater can cause operational problems. In this paper the effect of alternative types of ion exchange membrane is studied in biocatalyzed electrolysis cells. Four types of ion exchange membranes are used: (i) a CEM, (ii) an anion exchange membrane (AEM), (iii) a bipolar membrane (BPM), and (iv) a charge mosaic membrane (CMM). With respect to the electrochemical performance of the four biocatalyzed electrolysis configurations, the ion exchange membranes are rated in the order AEM > CEM > CMM > BPM. However, with respect to the transport numbers for protons and/or hydroxyl ions (tH/OH) and the ability to prevent pH increase in the cathode chamber, the ion exchange membranes are rated in the order BPM > AEM > CMM > CEM.

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Evaluation of Electrodialysis Desalination Performance of Novel Bioinspired and Conventional Ion Exchange Membranes with Sodium Chloride Feed Solutions

Membranes ◽

10.3390/membranes11030217 ◽

2021 ◽

Vol 11 (3) ◽

pp. 217

Author(s):

AHM Golam Hyder ◽

Brian A. Morales ◽

Malynda A. Cappelle ◽

Stephen J. Percival ◽

Leo J. Small ◽

...

Keyword(s):

Ion Exchange ◽

Cation Exchange ◽

Current Density ◽

Feed Solution ◽

Laboratory Scale ◽

Cation Exchange Membrane ◽

Limiting Current ◽

Ion Exchange Membranes ◽

Experimental Apparatus ◽

Exchange Membrane

Electrodialysis (ED) desalination performance of different conventional and laboratory-scale ion exchange membranes (IEMs) has been evaluated by many researchers, but most of these studies used their own sets of experimental parameters such as feed solution compositions and concentrations, superficial velocities of the process streams (diluate, concentrate, and electrode rinse), applied electrical voltages, and types of IEMs. Thus, direct comparison of ED desalination performance of different IEMs is virtually impossible. While the use of different conventional IEMs in ED has been reported, the use of bioinspired ion exchange membrane has not been reported yet. The goal of this study was to evaluate the ED desalination performance differences between novel laboratory‑scale bioinspired IEM and conventional IEMs by determining (i) limiting current density, (ii) current density, (iii) current efficiency, (iv) salinity reduction in diluate stream, (v) normalized specific energy consumption, and (vi) water flux by osmosis as a function of (a) initial concentration of NaCl feed solution (diluate and concentrate streams), (b) superficial velocity of feed solution, and (c) applied stack voltage per cell-pair of membranes. A laboratory‑scale single stage batch-recycle electrodialysis experimental apparatus was assembled with five cell‑pairs of IEMs with an active cross-sectional area of 7.84 cm2. In this study, seven combinations of IEMs (commercial and laboratory-made) were compared: (i) Neosepta AMX/CMX, (ii) PCA PCSA/PCSK, (iii) Fujifilm Type 1 AEM/CEM, (iv) SUEZ AR204SZRA/CR67HMR, (v) Ralex AMH-PES/CMH-PES, (vi) Neosepta AMX/Bare Polycarbonate membrane (Polycarb), and (vii) Neosepta AMX/Sandia novel bioinspired cation exchange membrane (SandiaCEM). ED desalination performance with the Sandia novel bioinspired cation exchange membrane (SandiaCEM) was found to be competitive with commercial Neosepta CMX cation exchange membrane.

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Ageing of ion-exchange membranes used in electrodialysis: Investigation of static parameters, electrolyte permeability and tensile strength

Separation and Purification Technology ◽

10.1016/j.seppur.2011.05.005 ◽

2011 ◽

Vol 80 (2) ◽

pp. 270-275 ◽

Cited By ~ 31

Author(s):

R. Ghalloussi ◽

W. Garcia-Vasquez ◽

N. Bellakhal ◽

C. Larchet ◽

L. Dammak ◽

...

Keyword(s):

Tensile Strength ◽

Ion Exchange ◽

Ion Exchange Membranes

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Characterization of Ion Exchange Membranes with Special Surface Structure

Periodica Polytechnica Chemical Engineering ◽

10.3311/ppch.9780 ◽

2017 ◽

Author(s):

Eliška Stránská ◽

Kristýna Weinertová ◽

David Neděla ◽

Jan Křivčík

Keyword(s):

Ion Exchange ◽

Physical Properties ◽

Surface Structure ◽

Flat Surface ◽

Ion Exchange Membrane ◽

Membrane Properties ◽

Ion Exchange Membranes ◽

Geometrical Structures ◽

Special Surface ◽

Exchange Membrane

This article focuses on the preparation of the heterogeneous ion exchange membrane with a special surface structure made with three types of knitted fabric. The special surface structure of ion exchange membranes can be useful for the intensification of mass transfer processes in electrodialysis.Three types of structured ion exchange membranes were prepared together with a membrane with a flat surface to compare the influence of geometrical structures on the behaviour of ion exchange membrane properties. Electrochemical, mechanical and physical properties were determined. Structured membranes exhibited comparable electrochemical and physical properties to the flat ion exchange membrane. Some transport parameters were measured in an electrodialysis stack with two concentrations of solution. Two electrodialysis stacks with different sizes of active area were used for comparison. Improving efficiency and mass flux was not confirmed. It was not demonstrated that structured IEMs were not better than IEMs with the flat surface.

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