Thin and robust organic solvent cation exchange membranes for ion separation

2019 ◽  
Vol 7 (23) ◽  
pp. 13903-13909 ◽  
Author(s):  
Yan Zhao ◽  
Yi Li ◽  
Jiajie Zhu ◽  
Amaia Lejarazu-Larrañaga ◽  
Shushan Yuan ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Cation Exchange ◽  
Functional Group ◽  
Condensation Reaction ◽  
Cation Exchange Membrane ◽  
Ion Separation ◽  
Casting Solution ◽  
Exchange Membrane ◽  
First Time

An ultrathin and robust organic solvent cation exchange membrane (CEM) was successfully fabricated for the first time using dissolved Kevlar aramid nanofibers as the casting solution and 4-aminobenzenesulfonic acid (ABS) as the negatively charged functional group via an amide condensation reaction for ion separation.

Cation exchange membrane integrated with cationic and anionic layers for selective ion separation via electrodialysis

Desalination ◽  
2019 ◽  
Vol 458 ◽  
pp. 25-33 ◽  
Author(s):  
Noor Ul Afsar ◽  
Muhammad Aamir Shehzad ◽  
Muhammad Irfan ◽  
Kamana Emmanuel ◽  
Fangmeng Sheng ◽  
...  
Keyword(s):  
Cation Exchange ◽  
Cation Exchange Membrane ◽  
Ion Separation ◽  
Exchange Membrane

scholarly journals Modified cation-exchange membrane for phosphate recovery in an electrochemically assisted adsorption–desorption process

2020 ◽  
Vol 56 (37) ◽  
pp. 5046-5049
Author(s):  
Kostadin V. Petrov ◽  
Laura Paltrinieri ◽  
Lukasz Poltorak ◽  
Louis C. P. M. de Smet ◽  
Ernst J. R. Sudhölter
Keyword(s):  
Iron Oxide ◽  
Cation Exchange ◽  
Cation Exchange Membrane ◽  
Oxide Nanoparticles ◽  
Desorption Process ◽  
Ion Separation ◽  
Polyhexamethylene Guanidine ◽  
Phosphate Recovery ◽  
Adsorption Desorption ◽  
Exchange Membrane

A novel ion separation methodology using a cation-exchange membrane modified with iron oxide nanoparticles (Fe3O4 NPs) coated with polyhexamethylene guanidine (PHMG) is proposed.

Heterogeneous PVC cation-exchange membrane synthesis by electrospinning for reverse electrodialysis

2020 ◽  
Vol 18 (7) ◽  
Author(s):  
Jesús Salvador Jaime-Ferrer ◽  
Marcela Mosqueda-Quintero ◽  
Victor A. Suárez-Toriello ◽  
Sean M. Anderson ◽  
Oscar A. González Vargas ◽  
...  
Keyword(s):  
Cation Exchange ◽  
Salinity Gradient ◽  
Sodium Dodecyl ◽  
Cation Exchange Resin ◽  
Cation Exchange Membrane ◽  
Solution Technique ◽  
Electrospinning Technique ◽  
Reverse Electrodialysis ◽  
Casting Solution ◽  
Exchange Membrane

AbstractBlue energy (or salinity gradient energy) is a renewable, carbon-neutral, and continuous electrical energy source that can be obtained via the reverse electrodialysis (RED) technique. The viability of this technology strictly depends on the performance and cost of the ion-exchange membranes (IEMs) that compose the RED units; designing the optimal membrane represents a critical challenge due to the complex relation between the performance, properties, and structure of the membrane. In this work, we present our findings on an electrospun cation-exchange membrane based on polyvinyl chloride (PVC), a strongly acidic cation exchange resin, with sodium dodecyl sulfate (SDS) as an additive. We contrast it with a similar membrane produced with the more conventional casting solution technique. The electrospinning technique provides thinner and more homogeneous membranes than those synthesized via casting. The membranes were characterized using morphological, spectroscopic, and analytical methods. Scanning electron microscopy images depicted an intertwined nanofiber mesh within the membrane. We also synthesized the same electrospun cation exchange membrane without SDS; this membrane presented 63% less swelling, and a significant increase in the fixed charge density (CDfix) (119.6 meq/g) when compared to its casting solution counterpart (34 meq/g). This suggests an enhanced permselectivity, and thus better performance for blue energy generation in RED units.

Improvement of HI concentration performance for hydrogen production iodine–sulfur process using crosslinked cation-exchange membrane

2021 ◽  
Vol 237 ◽  
pp. 116575
Author(s):  
Nobuyuki Tanaka ◽  
Shin-ichi Sawada ◽  
Tetsuya Yamaki ◽  
Takehide Kodaira ◽  
Takehiro Kimura ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Cation Exchange ◽  
Cation Exchange Membrane ◽  
Exchange Membrane

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

Membranes ◽  
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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