HIGH SURFACE CARBON ELECTRODES FOR CAPACITIVE DEIONIZATION

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F17%3A43913424" target="_blank" >RIV/60461373:22310/17:43913424 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.icct.cz/AngiologyKlon-ICCT/media/system/ICCT2017-full_papers.pdf" target="_blank" >http://www.icct.cz/AngiologyKlon-ICCT/media/system/ICCT2017-full_papers.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

HIGH SURFACE CARBON ELECTRODES FOR CAPACITIVE DEIONIZATION

Popis výsledku v původním jazyce

The large amount of water has to be treated worldwide. The most ordinary methods are distillation, reverse osmosis and electrodialysis at present time. Another promising process is capacitive deionisation (CDI) intensively studied in recent years. CDI is a very simple process for salinity reduction of treated water. The key components of CDI are porous carbon electrodes. Electrodes have to exhibit high specific surface area, pore structure suitable for ions capturing and high electron conductivity. The present work is focused on optimization of carbon electrodes and the cell design for CDI technology. Electrodes from various materials were examined in the simple bath cell by cyclic voltammetry and potential pulse chronoamperometry. Selected electrodes were measured also in the plug flow cell by potential pulse chronoamperometry. It was realized scale up of the plug flow cell based on laboratory experiments. Different spacers were measured in the laboratory plug flow cell with reference material Kynol as electrodes. The commercial electrode material Kynol has shown high electrosorption capacity at low potential sweep velocity. But, it was found significant drop of capacity at high potential sweep velocity i.e. limitation by transport of ions in the electrode body. Other electrodes were prepared from various activated carbons (Kuraray YP-80F, Kuraray YP-50F, Penta, ColorSorb-HP90) with binder (PVDF) on the support (Sigraflex - carbon film). Very high capacities have electrodes based on Kuraray activated carbon (KS) at all potential sweep velocities and potential pulse. Therefore these electrodes were used in the laboratory plug flow cell. KS electrodes showed the best results for CDI because concentration changes and electrode capacity are higher than all other electrodes. Electrodes KS show good stability during long term test. Therefore KS was selected for the scale up of CDI cell construction.

Název v anglickém jazyce

HIGH SURFACE CARBON ELECTRODES FOR CAPACITIVE DEIONIZATION

Popis výsledku anglicky

The large amount of water has to be treated worldwide. The most ordinary methods are distillation, reverse osmosis and electrodialysis at present time. Another promising process is capacitive deionisation (CDI) intensively studied in recent years. CDI is a very simple process for salinity reduction of treated water. The key components of CDI are porous carbon electrodes. Electrodes have to exhibit high specific surface area, pore structure suitable for ions capturing and high electron conductivity. The present work is focused on optimization of carbon electrodes and the cell design for CDI technology. Electrodes from various materials were examined in the simple bath cell by cyclic voltammetry and potential pulse chronoamperometry. Selected electrodes were measured also in the plug flow cell by potential pulse chronoamperometry. It was realized scale up of the plug flow cell based on laboratory experiments. Different spacers were measured in the laboratory plug flow cell with reference material Kynol as electrodes. The commercial electrode material Kynol has shown high electrosorption capacity at low potential sweep velocity. But, it was found significant drop of capacity at high potential sweep velocity i.e. limitation by transport of ions in the electrode body. Other electrodes were prepared from various activated carbons (Kuraray YP-80F, Kuraray YP-50F, Penta, ColorSorb-HP90) with binder (PVDF) on the support (Sigraflex - carbon film). Very high capacities have electrodes based on Kuraray activated carbon (KS) at all potential sweep velocities and potential pulse. Therefore these electrodes were used in the laboratory plug flow cell. KS electrodes showed the best results for CDI because concentration changes and electrode capacity are higher than all other electrodes. Electrodes KS show good stability during long term test. Therefore KS was selected for the scale up of CDI cell construction.

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/TH01030287" target="_blank" >TH01030287: Kapacitní deionizace pro úpravu vod a čištění odpadních vod</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 5th International Conference on Chemical Technology

ISBN

978-80-86238-65-4

ISSN

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e-ISSN

neuvedeno

Počet stran výsledku

6

Strana od-do

204-209

Název nakladatele

Česká společnost průmyslové chemie (ČSPCH)

Místo vydání

Praha

Místo konání akce

Mikulov

Datum konání akce

10. 4. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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