Separation of methanol-dimethyl carbonate vapour mixtures with PDMS and PTMSP membranes

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F17%3A43901657" target="_blank" >RIV/60461373:22340/17:43901657 - isvavai.cz</a>

Alternative codes found

RIV/67985858:_____/17:00507135

Result on the web

<a href="http://www.sciencedirect.com/science/article/pii/S1383586616309133" target="_blank" >http://www.sciencedirect.com/science/article/pii/S1383586616309133</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.seppur.2016.09.041" target="_blank" >10.1016/j.seppur.2016.09.041</a>

Result language

angličtina

Original language name

Separation of methanol-dimethyl carbonate vapour mixtures with PDMS and PTMSP membranes

Original language description

In this work, we report on the permeation of methanol and dimethyl carbonate (DMC) vapour mixtures through dense membranes made from cross-linked polydimethylsiloxane (PDMS) and from poly[(trimethylsilyl)propyne] (PTMSP). Since methanol forms a methanol-rich pressure-maximum azeotrope with dimethyl carbonate, vapour permeation through hydrophobic (DMC selective) membranes is presumably a favourable method of azeotrope breaking. Permeation of vapours of pure compounds and of binary vapour mixtures was measured at 40 °C for a series of feed mixture compositions. Both membranes showed practically constant permeabilities of both studied compounds, thus indicating that no significant coupling of fluxes occurred. The membrane prepared from PTMSP was ca. 2-5 times more permeable and showed higher separation factors (aDMC ? 4.2) than the one prepared from PDMS (aDMC ? 2.8). In the case of the PDMS, the separation factors decreased with the increasing dilution of the feed mixtures with inert gas (hydrogen). Conversely, the separation factors increased with increasing feed mixture dilution in the case of PTMSP. The highest separation factors were observed near the azeotrope composition for both polymers (ca. 82 mol.% of methanol), thus enabling the development of effective hybrid processes combining rectification columns and vapour permeation units.

Czech name

—

Czech description

—

Type

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

CEP classification

—

OECD FORD branch

10403 - Physical chemistry

Project

<a href="/en/project/GP13-32829P" target="_blank" >GP13-32829P: Separating azeotropes with the vapor permeation method</a><br>

Continuities

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

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

174

Issue of the periodical within the volume

3

Country of publishing house

BE - BELGIUM

Number of pages

11

Pages from-to

1-11

UT code for WoS article

000389091700001

EID of the result in the Scopus database

2-s2.0-84991738537