Anja Car (Author), Črtomir Stropnik (Author), Wilfredo Yave (Author), Klaus-Viktor Peinemann (Author)

Abstract

In the present work, membranes from commercially available Pebaxr MH 1657 and its blends with low molecular weight poly(ethylene glycol) PEG were prepared by using a simple binary solvent (ethanol/water). Dense film membranes show excellent compatibility with PEG system up to 50 wt.% of content. Gas transport properties have been determined for four gases (H2, N2, CH4, CO2) and the obtained permeabilities were correlated with polymer properties and morphology of the membranes. The permeability of CO2 in Pebaxr/PEG membrane (50 wt.% of PEG) was increased two fold regarding to the pristine Pebaxr. Although CO2/N2 and CO2/CH4 selectivity remained constant, an enhancement of CO2/H2 selectivity was observed. These results were attributed to the presence of EO units which increases CO2 permeability, and to a probable increase of fractional free-volume. Furthermore, for free-volume discussion and permeability of gases, additive and Maxwell models were used.

Keywords

membrane;membranska separacija;CO2;Pebax;separacija plinov;chemical processing;membranes;membrane separation;gas separation;blend membranes;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM FKKT - Faculty of Chemistry and Chemical Engineering
UDC: 66.081
COBISS: 11761686 Link will open in a new window
ISSN: 0376-7388
Views: 1598
Downloads: 64
Average score: 0 (0 votes)
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Other data

Secondary language: English
Secondary keywords: membrane;membranska separacija;CO2;Pebax;separacija plinov;
URN: URN:SI:UM:
Pages: str. 88-95
Volume: ǂVol. ǂ307
Issue: ǂiss. ǂ1
Chronology: 10 Jan. 2008
ID: 8718586
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