Molecular sieving of alkyl sulfate anions on strong basic gel-type anion-exchange resins

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F21%3A43922984" target="_blank" >RIV/60461373:22340/21:43922984 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/49777513:23640/21:43963062

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1383586621010911?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1383586621010911?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.seppur.2021.119382" target="_blank" >10.1016/j.seppur.2021.119382</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Molecular sieving of alkyl sulfate anions on strong basic gel-type anion-exchange resins

Popis výsledku v původním jazyce

The effort of today&apos;s society towards green, wasteless, and economic production technologies brings new challenges concerning the efficiency of chemical processes. Electromembrane separations are considered as one of the possible candidates in tackling the challenges mentioned above. They offer a competitive alternative to industrially employed standard separation processes regarding cost and control. However, their susceptibility to fouling, especially when the processed solutions are of biological origin, hinders their full application potential. Here, we experimentally determine the group of potential foulants by indirect measurement of the internal characteristic dimensions of a strongly basic anion-exchange resin. Such a resin is used in both ion-exchange beds and heterogeneous ion-exchange membranes. We determine the characteristic dimensions by running a set of electrochemical experiments with a homologous series of alkyl sulfates having a molecular weight in the range between 134 and 288 g/mol. The alkyl sulfates represent potential resin (membrane) foulants. Our results show that the alkyl sulfates can be divided into two groups. While the short alkyl sulfates are exchanged by the studied anion resin particle, the long ones virtually block the resin and hinder any ion exchange or transfer in the electric field. The molecules having dimensions corresponding to the length of the alkyl sulfates of the second group or longer are the potential foulants of the studied and related anion-exchange systems. The alkyl sulfate of the critical length has a distance between sulfur and outermost carbon atoms of around 1.18 nm as predicted from its structure in ChemDraw. We showed that the alkyl sulfates of the first group facilitate water splitting reaction, which indicates the water splitting is the primary mechanism of the observed overlimiting current. The electroconvective motion possibly contributing to the overlimiting current at anion-exchange systems is mostly suppressed. © 2021 Elsevier B.V.

Název v anglickém jazyce

Molecular sieving of alkyl sulfate anions on strong basic gel-type anion-exchange resins

Popis výsledku anglicky

The effort of today&apos;s society towards green, wasteless, and economic production technologies brings new challenges concerning the efficiency of chemical processes. Electromembrane separations are considered as one of the possible candidates in tackling the challenges mentioned above. They offer a competitive alternative to industrially employed standard separation processes regarding cost and control. However, their susceptibility to fouling, especially when the processed solutions are of biological origin, hinders their full application potential. Here, we experimentally determine the group of potential foulants by indirect measurement of the internal characteristic dimensions of a strongly basic anion-exchange resin. Such a resin is used in both ion-exchange beds and heterogeneous ion-exchange membranes. We determine the characteristic dimensions by running a set of electrochemical experiments with a homologous series of alkyl sulfates having a molecular weight in the range between 134 and 288 g/mol. The alkyl sulfates represent potential resin (membrane) foulants. Our results show that the alkyl sulfates can be divided into two groups. While the short alkyl sulfates are exchanged by the studied anion resin particle, the long ones virtually block the resin and hinder any ion exchange or transfer in the electric field. The molecules having dimensions corresponding to the length of the alkyl sulfates of the second group or longer are the potential foulants of the studied and related anion-exchange systems. The alkyl sulfate of the critical length has a distance between sulfur and outermost carbon atoms of around 1.18 nm as predicted from its structure in ChemDraw. We showed that the alkyl sulfates of the first group facilitate water splitting reaction, which indicates the water splitting is the primary mechanism of the observed overlimiting current. The electroconvective motion possibly contributing to the overlimiting current at anion-exchange systems is mostly suppressed. © 2021 Elsevier B.V.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20401 - Chemical engineering (plants, products)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Separation and Purification technology

ISSN

1383-5866

e-ISSN

—

Svazek periodika

276

Číslo periodika v rámci svazku

DEC 1 2021

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

119382

Kód UT WoS článku

000706301300023

EID výsledku v databázi Scopus

2-s2.0-85111884673