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- W1988751408 abstract "Triheptyl cellulose (THC)/ethyl cellulose (EC) (397) binary blend membranes were prepared from tetrahydrofuran (THF), chloroform and dichloromethane solutions and their oxygen enrichments were studied at different temperatures and operating times. With increasing temperature from 298 to 358 K, the flux Qoea and permeability Poea of oxygen-enriched air (OEA), the oxygen permeability Po2 and the oxygen concentration Yo2 in the OEA and the actual oxygen/nitrogen separation factor (ASF) through the membranes all increase. These oxygen-enrichment properties are better for the THC/EC membrane than for the THC-free pure EC membrane cast from the same THF. Moreover, the three THC/EC membranes show an interesting concurrent increase in the Yo2 and Qoea with increasing temperature. It is found that the efficiency of enriching oxygen through the THC/EC membrane varies slightly after 80h of operation. The magnitudes of the Qoea and Yo2 for a 17 μm-thick THC/EC membrane cast from THF are 6.7 × 10−4 cm3 (STP)/s cm2 and 38.8%, respectively, at 358 K and transmembrane pressure difference of 0.41 MPa in a single step. The ordered supermolecular arrangement of the cholesteric liquid crystalline THC may be responsible for these results. Additionally the oxygen-enriching ability depends slightly on membrane-forming solvents." @default.
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- W1988751408 date "1996-08-07" @default.
- W1988751408 modified "2023-09-27" @default.
- W1988751408 title "Temperature dependence and stability of oxygen enrichment through liquid crystalline triheptyl cellulose-containing membranes cast from three solvents" @default.
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- W1988751408 doi "https://doi.org/10.1016/0376-7388(95)00070-4" @default.
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