ISSN:
1435-1536
Keywords:
Liquid crystalline cellulose ether
;
liquid crystal membrane
;
oxygen enrichment membrane
;
air separation
;
pressure dependency
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Cholesteric liquid crystalline triheptyl cellulose (THC)/ethyl cellulose binary blend membranes were prepared and the effect of pressure on their oxygen enrichment at elevated temperature was investigated using a constant pressure-variable volume method. The oxygen enrichment increased with the increase of transmembrane pressure difference or with slight increase of the THC content in the blend membranes. The oxygen concentration through the membranes increased linearly with decreasing pressure ratio. Air was directly separated through a 17 μm-thick THC/EC(1.5/98.5) membrane to prepare an oxygen-enriched air containing 39.5% oxygen at the flux of 6.99×10−4 cm3 (STP)/s.cm2 at the pressure difference of 0.43 MPa and 85 °C.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00658755
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