Comparison of Pervaporation and Perstraction for the Separation of p-xylene/m-xylene Mixtures Using PDMS and CTA Membranes

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F21%3A43921917" target="_blank" >RIV/60461373:22310/21:43921917 - isvavai.cz</a>

Alternative codes found

RIV/60461373:22340/21:43921917

Result on the web

<a href="https://doi.org/10.1016/j.seppur.2021.118986" target="_blank" >https://doi.org/10.1016/j.seppur.2021.118986</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.seppur.2021.118986" target="_blank" >10.1016/j.seppur.2021.118986</a>

Result language

angličtina

Original language name

Comparison of Pervaporation and Perstraction for the Separation of p-xylene/m-xylene Mixtures Using PDMS and CTA Membranes

Original language description

The separation of the individual xylene isomers remains challenging and energy intensive. Since the utilization of membrane separations could bring an improvement, we compare the efficacy of two related membrane methods, pervaporation and perstraction, for the separation of p‑xylene/m‑xylene mixtures using membranes from polydimethylsiloxane (PDMS) and cellulose triacetate (CTA) at 40 °C. Methanol was used as the receiving liquid in perstraction and as a membrane entrainer; feeds containing 0–80 mol.% of methanol were studied. While PDMS showed almost no selectivity to p‑xylene over m‑xylene during pervaporation, the selectivity reached up to 1.40 when operated in the perstraction mode with the feed enriched with methanol. CTA performed better than PDMS for all studied mixtures, the highest selectivity of 1.93 was observed for the perstraction of the molten eutectic mixture with no methanol in the feed. The likely reason for the enhancement of the selectivity are the isomer-specific interactions with the polar moieties in the polymer plasticized by methanol. Overall, it was demonstrated that a simple change in the mode of operation from pervaporation to perstraction and the use of a membrane entrainer can appreciably enhance the p‑xylene to m‑xylene selectivity of the common and reliable membrane materials.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10404 - Polymer science

Project

<a href="/en/project/GA18-08389S" target="_blank" >GA18-08389S: Study of plasticization of polymeric membranes and thermodynamics of multicomponent sorption for the development of effective membrane separations</a><br>

Continuities

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

Publication year

2021

Confidentiality

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

Name of the periodical

Separation and Purification technology

ISSN

1383-5866

e-ISSN

—

Volume of the periodical

274

Issue of the periodical within the volume

1 November 2021

Country of publishing house

BE - BELGIUM

Number of pages

11

Pages from-to

118986

UT code for WoS article

000668937600009

EID of the result in the Scopus database

2-s2.0-85107147799