Solid state synthesis of SrFeCo0.5Ox asymmetric membranes for oxygen separation

Masayuki Ikeguchi, Yasukazu Uchida, Yasushi Sekine, Eiichi Kikuchi, Masahiko Matsukata

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

SrFeCo0.5Ox asymmetric membranes for oxygen permeation consisting of a thin dense layer and a porous support layer were prepared using a simple method. A given amount of SrFeCo0.5Ox powder was placed in a die, and then a mixture of SrFeCo0.5Ox powder and ethyl cellulose powder was added on top of the SrFeCo0.5Ox powder. The layered powders were pressed into a 13-mm-diameter disk, and calcined at 1423 K. This produced a membrane with a thin dense layer and, through the elimination of the ethyl cellulose, a porous support layer. Oxygen flux through membranes thus produced increased with decreasing dense-layer thickness. The maximum oxygen flux through an asymmetric membrane at 1173 K observed was 0.23 cm3 (STP) cm-2 min-1, which was 2.8 times larger than that through a 0.95-mm-thick symmetric membrane. Oxygen permeation was primarily limited by bulk diffusion in the thin dense layer, although the porous support layer acted to resist oxygen permeation.

Original languageEnglish
Pages (from-to)502-508
Number of pages7
JournalJOURNAL OF CHEMICAL ENGINEERING OF JAPAN
Volume38
Issue number7
DOIs
Publication statusPublished - 2005 Nov 9

Keywords

  • Asymetric membrane
  • Ceramic
  • Ethyl cellulose
  • Oxygen permeation
  • SrFeCoO

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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