Fibers (May 2019)

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

  • George Dibrov,
  • Mikhail Ivanov,
  • Mikhail Semyashkin,
  • Vladislav Sudin,
  • Nikita Fateev,
  • George Kagramanov

DOI
https://doi.org/10.3390/fib7050043
Journal volume & issue
Vol. 7, no. 5
p. 43

Abstract

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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.

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