Measurement of external leaks of different types of ion-exchange membranes and spacers

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28676092%3A_____%2F19%3AN0000093" target="_blank" >RIV/28676092:_____/19:N0000093 - isvavai.cz</a>
Result on the web
<a href="http://sschi.chtf.stuba.sk/ssche_conference2019.html" target="_blank" >http://sschi.chtf.stuba.sk/ssche_conference2019.html</a>
DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Measurement of external leaks of different types of ion-exchange membranes and spacers
Original language description
One of the unwanted phenomena, which can occur during electrodialysis (ED), is external leaks. The aim of this work is to find a simple, repeatable procedure to evaluate external leaks of combination of different types of spacers and membranes, in order to determine compatibility of spacers and membrane materials. Leaks were measured on a simple cell which demonstrates the electrodialysis stack. The stack was tightened on the tensile testing machine. The force which the stack was tightened was c.a. 870 N. Then the leaks were measured at the temperature 25 °C and at different pressures (1.5, 2, 2.5 and 3 bar). The tests were done with three different polyethylene and polypropylene spacers and two heterogeneous membranes (RALEX® IM-PES and RALEX® IM-PP). In general, external leaks decreased with time. Leaks decreased almost to zero when tested for a long time. There was an assumption that the amount of leaks would depend on the mechanical properties of spacer materials. This assumption was not confirmed.
Czech name
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Czech description
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Project
<a href="/en/project/LO1418" target="_blank" >LO1418: Progressive development of the Membrane Innovation Centre</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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