Abstract

In an effort to further improvement of LSCF hollow fiber membrane properties in oxygen purification applications, this work studied the use of polyethylene glycol (PEG) with a different molecular weights of 2000, 3400 and 6000 Da as a pore former. A well-prepared hollow fiber membrane was successfully fabricated via extrusion followed by a sintering method. The results showed that the addition of PEG increased the viscosity of the dope suspension and formed a constant asymmetric pore configuration of the membrane after sintering at 1250 °C. The increasing molecular weight of PEG also leads to a decrease in the mechanical strength of the membranes, indicating that finger-like pores were sacrificed by forming irregular pores. The gas tightness was also examined under room temperature which showed that membrane with PEG 3400 achieved the best tightness with the nitrogen permeability of 3.55 × 10−5 mol·m−2·s−1·Pa−1. The oxygen permeation of the membranes was also influenced by the addition of PEG, where the highest oxygen permeation flux of 6.07 × 10−8 mol·cm−2·s−1 was obtained using a hollow fiber membrane with PEG 3400 due to the existence of the lowest dense layer thickness.

Original languageEnglish
Pages (from-to)200-206
Number of pages7
JournalJournal of King Saud University - Engineering Sciences
Volume35
Issue number3
DOIs
Publication statusPublished - Mar 2023

Keywords

  • Cleaner Fossil Fuel Technology
  • Hollow fiber membrane
  • LaSrCoFeO (LSCF 7328)
  • Membrane morphology
  • Perovskite oxide
  • Phase inversion
  • Polyethylene glycol

Fingerprint

Dive into the research topics of 'A dependence study: Molecular weight of polyethylene glycol (PEG) ON La0.7Sr0.3Co0.2Fe0.8O3−δ (LSCF 7328) hollow fiber membrane for oxygen permeation'. Together they form a unique fingerprint.

Cite this