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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/67985858:_____/17:00507135

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

<a href="/cs/project/GP13-32829P" target="_blank" >GP13-32829P: Dělení azeotropických směsí metodou permeace par</a><br>

Návaznosti

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

Rok uplatnění

2017

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

174

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

BE - Belgické království

Počet stran výsledku

11

Strana od-do

1-11

Kód UT WoS článku

000389091700001

EID výsledku v databázi Scopus

2-s2.0-84991738537