Elaboration of High Permeable Macrovoid Free Polysulfone Hollow Fiber Membranes for Air Separation

In this work, polysulfone hollow fibers with oxygen permeance 70 L (STP)/(m2·h·bar) and selectivity α(O2/N2) = 6 were obtained. A decrease in the dope solution temperature allowed to diminish macrovoids due to the increase of the dope viscosity from 15.5 Pa·s at 62 °C to 35 Pa·s at 25 °C. To reduce...

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Bibliographic Details
Published inFibers Vol. 7; no. 5; p. 43
Main Authors Dibrov, George, Ivanov, Mikhail, Semyashkin, Mikhail, Sudin, Vladislav, Fateev, Nikita, Kagramanov, George
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.05.2019
Subjects
air
Air separation
Electron microscopes
Ethanol
gas separation
Hollow fiber membranes
Membranes
Nitrogen
Packing density
Polyesters
Polymers
polysulfone
Polysulfone resins
Selectivity
Solvents
Germany
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Summary:In this work, polysulfone hollow fibers with oxygen permeance 70 L (STP)/(m2·h·bar) and selectivity α(O2/N2) = 6 were obtained. A decrease in the dope solution temperature allowed to diminish macrovoids due to the increase of the dope viscosity from 15.5 Pa·s at 62 °C to 35 Pa·s at 25 °C. To reduce the fiber diameter, thereby increasing the packing density, they were spun at high linear velocities. A hollow fiber membrane element was produced with effective membrane area 2.75 m2 and packing density 53%. Its air separation performance was evaluated to bridge laboratory studies and practical application.
ISSN:2079-6439
2079-6439
DOI:10.3390/fib7050043