Electric Potential Profiles in a Model Single-Path Electrodialysis Unit

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F22%3A43925226" target="_blank" >RIV/60461373:22340/22:43925226 - isvavai.cz</a>

Alternative codes found

RIV/49777513:23640/22:43967548

Result on the web

<a href="https://www.mdpi.com/2077-0375/12/11/1136" target="_blank" >https://www.mdpi.com/2077-0375/12/11/1136</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/membranes12111136" target="_blank" >10.3390/membranes12111136</a>

Result language

angličtina

Original language name

Electric Potential Profiles in a Model Single-Path Electrodialysis Unit

Original language description

Electrodialysis is an important electromembrane separation process anticipated to play a significant role in developing future technologies. It produces ion-depleted and ion-concentrated product streams, intrinsically suggesting the formation of spatial gradients of relevant quantities. These quantities affect local conditions in an electrodialysis unit. To investigate the spatial distribution of electric potentials, we constructed a model electrodialysis system with a single diluate channel that included ports for inserting reference electrodes measuring potential profiles. We validated our system and measurement methods in a series of control experiments under a solution flow rate of 250 µL/min and current densities between 10 and 52 A/m2. The collected data showed that the electric potential in the diluate channel did not change in the vertical direction (direction of gravity force), and only minimally varied in the diluate channel center in the flow direction. Although we could not reconstruct the potential profile within ion-depleted layers due to the resolution of the method, we found appreciable potential variation across the diluate channel. The most significant potential drops were localized on the membranes with the developed ion-depleted zones. Interestingly, these potential drops abruptly increased when we applied current loads, yielding almost complete desalination. The increase in the resistance accompanied by relatively large fluctuations in the measured potential indicated the system transition into limiting and overlimiting regions, and the onset of overlimiting convection.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20401 - Chemical engineering (plants, products)

Project

<a href="/en/project/GA20-21263S" target="_blank" >GA20-21263S: Analysis of electrodialysis in milifluidic flow-through systems</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Membranes

ISSN

2077-0375

e-ISSN

2077-0375

Volume of the periodical

12

Issue of the periodical within the volume

11

Country of publishing house

CH - SWITZERLAND

Number of pages

15

Pages from-to

1136

UT code for WoS article

000910814900001

EID of the result in the Scopus database

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