THE IMPACT OF SPACER DESIGN ON ELECTRODIALYSIS PROCESS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28676092%3A_____%2F17%3AN0000043" target="_blank" >RIV/28676092:_____/17:N0000043 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

THE IMPACT OF SPACER DESIGN ON ELECTRODIALYSIS PROCESS

Popis výsledku v původním jazyce

Efficiency is very important factor for each technological process. Electrodialysis efficiency is influenced not only by ion-exchange membrane performance, but also by design of spacer, its type of the flow distributor, spacer material and the conditions of process. The membrane spacer influences the flow regime and so minimizes laminar flow, distributes the feed so it maximizes use of active membrane area and insures good tightness of the membrane stack. Due to different mechanical properties of different types of ion-exchange membranes, spacer must be designed according to them. The only way to find if the spacer suits the ion-exchange membrane is to perform different experiments and compare the results. In this work two types of membranes and four types of spacers are tested and results are compared to show, how much different spacers and ion-exchange membranes influence the electrodialysis process. The flow distributor influence pressure drop and internal leakage the most. Spacers with net flow distributors had the lowest volume of internal leakage, 50 ml.h-1 for spacer with net distributor vs. 126 ml.h-1 for spacer with narrow channels distributor. On the mass flux, net used in active area of spacer had the greatest impact. When PP net was used mass flux was the highest for both membranes. Mass flux for IM LT membranes was 0.301 kg.m-2.h-1 when spacer with PP net was used, on the contrary when spacer with PE net was used, mass flux was only 0.256 kg.m-2.h-1.

Název v anglickém jazyce

THE IMPACT OF SPACER DESIGN ON ELECTRODIALYSIS PROCESS

Popis výsledku anglicky

Efficiency is very important factor for each technological process. Electrodialysis efficiency is influenced not only by ion-exchange membrane performance, but also by design of spacer, its type of the flow distributor, spacer material and the conditions of process. The membrane spacer influences the flow regime and so minimizes laminar flow, distributes the feed so it maximizes use of active membrane area and insures good tightness of the membrane stack. Due to different mechanical properties of different types of ion-exchange membranes, spacer must be designed according to them. The only way to find if the spacer suits the ion-exchange membrane is to perform different experiments and compare the results. In this work two types of membranes and four types of spacers are tested and results are compared to show, how much different spacers and ion-exchange membranes influence the electrodialysis process. The flow distributor influence pressure drop and internal leakage the most. Spacers with net flow distributors had the lowest volume of internal leakage, 50 ml.h-1 for spacer with net distributor vs. 126 ml.h-1 for spacer with narrow channels distributor. On the mass flux, net used in active area of spacer had the greatest impact. When PP net was used mass flux was the highest for both membranes. Mass flux for IM LT membranes was 0.301 kg.m-2.h-1 when spacer with PP net was used, on the contrary when spacer with PE net was used, mass flux was only 0.256 kg.m-2.h-1.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20402 - Chemical process engineering

Projekt

<a href="/cs/project/LO1418" target="_blank" >LO1418: Progresivní rozvoj Membránového inovačního centra</a><br>

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

Workshop of Students’ Presentations 2017, Membranes and Membrane Processes

ISBN

978-80-906831-0-5

ISSN

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e-ISSN

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Počet stran výsledku

11

Strana od-do

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Název nakladatele

Czech Membrane Platform

Místo vydání

Česká Lípa

Místo konání akce

Stráž pod Ralskem

Datum konání akce

18. 10. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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