Oxygen permeation properties of ceria-ferrite-based composites

H. Takamura, K. Okumura, Y. Koshino, Atsunori Kamegawa, M. Okada

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

The oxygen flux density of Ce0.8Gd0.2O 1.9-x vol% MnFe2O4 (CGO-xMFO) composite-type ceramics membranes has been investigated. The samples and reforming catalysts were prepared by the Pechini process. For the CGO-xMFO composites, oxygen permeation was observed even at x = 3 vol%, presumably due to the presence of grain boundary phases. For CGO-15MFO, the n-type electronic conductivity was found to be dominant at 900°C or higher. The thickness dependence of jO 2 revealed that surface exchange kinetics was significantly involved in the case of the membrane thickness of L < 0.5 mm. The highest oxygen flux density of 10 μ mol·cm-2·s-1 was achieved for CGO-15MFO with the 10 mass% Ni-Pr:CeO2 catalyst (L = 0.25 mm) at 1000°C and a flow rate of 270 sccm.

Original languageEnglish
Pages (from-to)613-618
Number of pages6
JournalJournal of Electroceramics
Volume13
Issue number1-3
DOIs
Publication statusPublished - 2004 Jul 1

Keywords

  • Composites
  • Doped ceria
  • Oxygen permeable membranes
  • Partial oxidation of methane
  • Spinel-type ferrite

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering
  • Materials Chemistry

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