Conductivity of ion-exchange resins for electrodeionization

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28676092%3A_____%2F19%3AN0000041" target="_blank" >RIV/28676092:_____/19:N0000041 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.czemp.cz/cs/workshop-students-presentation-fulltexts/wsp-2019-fulltexty" target="_blank" >http://www.czemp.cz/cs/workshop-students-presentation-fulltexts/wsp-2019-fulltexty</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Conductivity of ion-exchange resins for electrodeionization

Popis výsledku v původním jazyce

Conductivity of ion-exchange resins plays an important role in the kinetics of the electrodeionization process as it influences the distribution of current density between the continuous zones of anion-exchange and cation-exchange resin beads across the diluting chambers of an electrodeionization stack. Therefore, this property must be carefully observed when selecting suitable ion-exchange resins for electrodeionization. The aim of this work was to measure conductivity of a selected type of strong acid cation-exchange resins in Na+ and H+ forms and type 1 strong base anion-exchange resins in Cl- and OH- forms from several lot numbers. Procedure for pretreatment and conversion of ion-exchange resin to the required ionic form prior to conductivity measurement was improved, so that it was not necessary to change experimental setup during measurement. The experimental setup comprised a flow-through cell filled with the resin, through which high purity water was passed. Purity of the water was maintained by cation-exchange and anion-exchange columns connected in series, which were incorporated in the loop. Quality of the water was monitored by two conductivity sensors installed at the inlet to and the outlet from the cell. The conductivity of the resin was measured by impedance spectroscopy at a constant frequency of 1 kHz. Results obtained show a higher variability of conductivity of anion-exchange resin compared to cation-exchange resin.

Název v anglickém jazyce

Conductivity of ion-exchange resins for electrodeionization

Popis výsledku anglicky

Conductivity of ion-exchange resins plays an important role in the kinetics of the electrodeionization process as it influences the distribution of current density between the continuous zones of anion-exchange and cation-exchange resin beads across the diluting chambers of an electrodeionization stack. Therefore, this property must be carefully observed when selecting suitable ion-exchange resins for electrodeionization. The aim of this work was to measure conductivity of a selected type of strong acid cation-exchange resins in Na+ and H+ forms and type 1 strong base anion-exchange resins in Cl- and OH- forms from several lot numbers. Procedure for pretreatment and conversion of ion-exchange resin to the required ionic form prior to conductivity measurement was improved, so that it was not necessary to change experimental setup during measurement. The experimental setup comprised a flow-through cell filled with the resin, through which high purity water was passed. Purity of the water was maintained by cation-exchange and anion-exchange columns connected in series, which were incorporated in the loop. Quality of the water was monitored by two conductivity sensors installed at the inlet to and the outlet from the cell. The conductivity of the resin was measured by impedance spectroscopy at a constant frequency of 1 kHz. Results obtained show a higher variability of conductivity of anion-exchange resin compared to cation-exchange resin.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

<a href="/cs/project/FV10062" target="_blank" >FV10062: Elektromembránové moduly nové generace (MODULY)</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

Workshop of Students´ Presentations 2019

ISBN

978-80-906831-9-8

ISSN

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e-ISSN

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Počet stran výsledku

2

Strana od-do

31-32

Název nakladatele

Czech Membrane Platform

Místo vydání

Česká Lípa

Místo konání akce

Stráž pod Ralskem

Datum konání akce

16. 10. 2019

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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