PEG modified poly(amide-b-ethylene oxide) membranes for CO2 separation
Povzetek
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.
Ključne besede
membrane;membranska separacija;CO2;Pebax;separacija plinov;chemical processing;membranes;membrane separation;gas separation;blend membranes;
Podatki
| Jezik: | Angleški jezik |
|---|---|
| Leto izida: | 2008 |
| Tipologija: | 1.01 - Izvirni znanstveni članek |
| Organizacija: | UM FKKT - Fakulteta za kemijo in kemijsko tehnologijo |
| UDK: | 66.081 |
| COBISS: |
11761686
|
| ISSN: | 0376-7388 |
| Št. ogledov: | 1598 |
| Št. prenosov: | 64 |
| Ocena: | 0 (0 glasov) |
| Metapodatki: |
|
Ostali podatki
| Sekundarni jezik: | Angleški jezik |
|---|---|
| Sekundarne ključne besede: | membrane;membranska separacija;CO2;Pebax;separacija plinov; |
| URN: | URN:SI:UM: |
| Strani: | str. 88-95 |
| Letnik: | ǂVol. ǂ307 |
| Zvezek: | ǂiss. ǂ1 |
| Čas izdaje: | 10 Jan. 2008 |
| ID: | 8718586 |
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