The impact of electrodialysis module design on its hydraulic characteristics

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28676092%3A_____%2F16%3AN0000073" target="_blank" >RIV/28676092:_____/16:N0000073 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

The impact of electrodialysis module design on its hydraulic characteristics

Original language description

Measure hydraulic char. of various pilot electrodialysis modules and thus to extend knowledge basis necessary to design new modules adapted for specific applications.Measured char. incl. pressure drop dependence on linear flow velocity, internal leakages determined while only one working circuit was circulated and external leakages at defined pressure.Modules differed e.g. by spacer material,type of turbulizing net,design of liquid distribution system in the chambers, nr. of working circuits or nr. of membrane pairs.It was shown that nr. of membrane pairs in the range of 25–60 in pilot electrodialysis module didn´t affect the pressure drop in module significantly. Similar pressure drops were obtained also in modules with spacers differing in material, turbulizing net type or design of liquid distribution system.Significant increase in pressure drop was observed in the case of module with tortuous spacers,as measured values was more than twice as that of the modules with flow sheet spacers.Higher pressure drops occurred also in the case of 3-circuit module with bipolar membranes, probably due to narrower channels in liquid distribution system or the application of bipolar membranes without reinforcing fabric.However,obtained results were a bit confusing,as higher differences between various module designs were expected.Regarding internal leakages,it was observed that this parameter is affected mainly by the design of liquid distribution channels in spacers, but also by the number of module membrane cells.Modules with dense mesh in spacer distribution channels and with less membr. cells had lower internal leakages than modules with narrow empty channels and with more membr. cells.Measurements of external leakages shown that modules with spacers made from polyethylene and with more membrane cells had higher external leakages that the others.Moreover,modules with polypropylene spacers had in most cases no external leakages no matter what was the pressure in the module.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JP - Industrial processes and processing

OECD FORD branch

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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

2016

Confidentiality

C - Předmět řešení projektu podléhá obchodnímu tajemství (§ 504 Občanského zákoníku), ale název projektu, cíle projektu a u ukončeného nebo zastaveného projektu zhodnocení výsledku řešení projektu (údaje P03, P04, P15, P19, P29, PN8) dodané do CEP, jsou upraveny tak, aby byly zveřejnitelné.

Article name in the collection

Proceedings 43rd International Conference of Slovak Society of Chemical Engineering

ISBN

978-80-89597-35-2

ISSN

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e-ISSN

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Number of pages

8

Pages from-to

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Publisher name

Slovak Society of Chemical Engineering

Place of publication

Bratislava

Event location

Tatranské Matliare

Event date

May 23, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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