Ce0.8Sm0.2O1.9–La0.8Sr0.2Cr0.5Fe0.5O3−δ Dual-Phase Hollow Fiber Membranes Operated under Different Gradients

Tong Liu, Wei He, Hua Huang, Siwei Wang, Henricus J.M. Bouwmeester, Chusheng Chen

Research output: Contribution to journalArticleAcademicpeer-review

18 Citations (Scopus)

Abstract

Ce0.8Sm0.2O1.9−La0.8Sr0.2Cr0.5Fe0.5O3−δ (SDC-LSCrF) composite hollow fiber membranes were prepared by phase inversion followed by sintering. Average oxygen fluxes of 0.5 cm3·cm−2·min−1 (STP) were measured, at 950 °C, by feeding either He or CO2 (30 mL·min−1) into the lumen of the hollow fiber (with length 48 mm), while exposing the shell side to ambient air. The oxygen flux at given conditions increases to 4.8 cm3·cm−2·min−1 (STP) when the reactive sweep gas CO is employed. The profound lowering of the activation energy for the oxygen flux relative to that observed upon using He and CO2 as sweep gas suggests that rate limitations by the surface exchange reaction occur when using the latter sweep gases. The developed hollow fiber membranes show excellent stability over the 750 h duration of the tests and therefore hold promise for application in oxyfuel combustion processes and membrane reactors.
Original languageEnglish
Pages (from-to)6131-6136
JournalIndustrial and engineering chemistry research
Volume53
DOIs
Publication statusPublished - 2014

Keywords

  • IR-94364
  • METIS-309245

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