Water dissociation phenomena in a bipolar membrane

1999 ◽  
Vol 42 (6) ◽  
pp. 589-598 ◽  
Author(s):  
Tongwen Xu ◽  
Weihua Yang ◽  
Binglin He
Keyword(s):  
Water Dissociation ◽  
Bipolar Membrane

Electrodialysis Pump Based on Enhanced Water Dissociation of Bipolar Membrane

2020 ◽  
Vol 92 (9) ◽  
pp. 6263-6268 ◽  
Author(s):  
Yue Sun ◽  
Shiyuan Lin ◽  
Feifang Zhang ◽  
Bingcheng Yang
Keyword(s):  
Water Dissociation ◽  
Bipolar Membrane

Bipolar membrane polarization behavior with systematically varied interfacial areas in the junction region

2021 ◽  
Author(s):  
Subarna Kole ◽  
Gokul Venugopalan ◽  
Deepra Bhattacharya ◽  
Le Zhang ◽  
John Cheng ◽  
...  
Keyword(s):  
Electric Field ◽  
Water Dissociation ◽  
Bipolar Membrane ◽  
Junction Region ◽  
Bipolar Membranes ◽  
Membrane Polarization ◽  
Interfacial Areas ◽  
Left Image ◽  
The Right ◽  
The Relationship

Left image is the relationship for the overpotential for water dissociation as a function of bipolar junction electric field whereas the right image presents micrographs and the procedure to make bipolar membranes with micropatterned interfaces.

Catalytic water dissociation using hyperbranched aliphatic polyester (Boltorn® series) as the interface of a bipolar membrane

2007 ◽  
Vol 316 (2) ◽  
pp. 604-611 ◽  
Author(s):  
Yanhong Xue ◽  
Tongwen Xu ◽  
Rongqiang Fu ◽  
Yiyun Cheng ◽  
Weihua Yang
Keyword(s):  
Water Dissociation ◽  
Aliphatic Polyester ◽  
Bipolar Membrane

Effect of added salt and increase in ionic strength on skim milk electroacidification performances

2001 ◽  
Vol 68 (2) ◽  
pp. 237-250 ◽  
Author(s):  
LAURENT BAZINET ◽  
DENIS IPPERSIEL ◽  
CHRISTINE GENDRON ◽  
BEHZAD MAHDAVI ◽  
JEAN AMIOT ◽  
...  
Keyword(s):  
Ionic Strength ◽  
Protein Profile ◽  
Skim Milk ◽  
Operation Time ◽  
Water Dissociation ◽  
Bipolar Membrane ◽  
Cathode Voltage ◽  
Experimental Conditions ◽  
Bipolar Membranes ◽  
Added Salt

Bipolar-membrane electroacidification (BMEA) technology, which uses the property of bipolar membranes to split water and the demineralization action of cation-exchange membranes (CEM), was tested for the production of acid casein. BMEA has numerous advantages in comparison with conventional isoelectric precipitation processes of proteins used in the dairy industry. BMEA uses electricity to generate the desired ionic species to acidify the treated solutions. The process can be precisely controlled, as electro-acidification rate is regulated by the effective current density in the cell. Water dissociation at the bipolar membrane interface is continuous and avoids local excess of acid. In-situ generation of dangerous chemicals (acids and bases) reduces the risks associated with the handling, transportation, use and elimination of these products. The aim of this study was to evaluate the performance of BMEA in different conditions of added ionic strength (μadded = 0, 0·25, 0·5 and 1·0 M) and added salt (CaCl2, NaCl and KCl).The combination of KCl and μadded = 0·5 M gave the best results with a 45% decrease in energy consumption. The increased energy efficiency was the result of a decrease in the anode/cathode voltage difference. This was due to an increase of conductivity, produced by addition of salt, necessary to compensate for the lack of sufficiently mobile ions in the skim milk. However, the addition of salts, irrespective of type or ionic strength, increased the required operation time. The protein profile of isolates were similar under all experimental conditions, except at 1·0 M-CaCl2.

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