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PEG modified poly(amide-b-ethylene oxide) membranes for CO2 separation
Anja Car, Črtomir Stropnik, Wilfredo Yave, Klaus-Viktor Peinemann, 2008, izvirni znanstveni članek

Opis: 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: chemical processing, membranes, membrane separation, CO2, Pebax, gas separation, blend membranes
Objavljeno: 01.06.2012; Ogledov: 1009; Prenosov: 21
URL Povezava na celotno besedilo

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Pebax©/Polyethlylene glycol blend thin film composite membranes for CO2 separation : performance with mixed gases
Anja Car, Črtomir Stropnik, Wilfredo Yave, Klaus-Viktor Peinemann, 2008, izvirni znanstveni članek

Opis: The paper describes the performance of Pebax©/Polyethylene glycol (PEG) blend thin film composite membranes for CO2 separation from gas mixtures containing H2, N2 and CH4. Membranes were tested at different conditions; temperature andpressure dependence of gas flux and selectivity were explored. The temperature dependence was correlated with the Arrhenius equation to determinethe activation energy of single gas permeation. Single and mixed gas permeation was measured for different pressures at 293K up to 20 bar. Improvedpermeabilities and CO2/H2 selectivities were obtained in the newly developed composite membranes.
Ključne besede: chemical processing, membranes, membrane separation, CO2, Pebax, thin film composite membranes, gas separation
Objavljeno: 01.06.2012; Ogledov: 1280; Prenosov: 19
URL Povezava na celotno besedilo

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Vzajemni skladi in alternativne oblike skladov : diplomsko delo
Anja Prislan, 2004, diplomsko delo

Objavljeno: 28.09.2007; Ogledov: 1467; Prenosov: 72
.pdf Celotno besedilo (632,74 KB)

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