Synthesis and oxygen-permeation properties of thin YSZ/Pd composite membranes

Jinsoo Kim, Jerry Lin

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Thin dense yttria-stabilized-zirconia (YSZ)/Pd composite (dual-phase) membranes were fabricated on porous YSZ membranes by a new approach that combines the reservoir method and chemical vapor deposition (CVD) technique. A thin porous YSZ layer was coated on a porous alumina support by dip coating the YSZ suspension. A continuous Pd phase was formed inside pores of the YSZ layer by the reservoir method. The residual pores of the YSZ/Pd layer were plugged with yttria/zirconia by CVD to ensure the gas tightness of the membranes. The oxygen-permeation fluxes through these composite (dual-phase) membranes, measured in sire in the CVD reactor, are 2.0 x 10-8 and 4.8 x 10-8 mol/cm2. s at 1,050°C when air and oxygen are used as the permeate gases, respectively. These oxygen-permeation values are about I order of magnitude higher than those of pure YSZ membranes prepared under similar conditions. The apparent activation energies for oxygen permeation at 900-1,050°C are 193 kJ/mol for thin YSZ/Pd composite (dual-phase) membranes and 124 kJ/mol for pure YSZ membranes. These results are explained in terms of relative importance of various masstransfer steps for oxygen permeation and microstructure of the YSZ/Pd composite membranes prepared by this technique.

Original languageEnglish (US)
Pages (from-to)1521-1529
Number of pages9
JournalAICHE Journal
Volume46
Issue number8
StatePublished - Aug 2000
Externally publishedYes

Fingerprint

Composite membranes
Yttria stabilized zirconia
Permeation
Oxygen
Membranes
Chemical vapor deposition
Composite materials
Gases
yttria
zirconium oxide
Yttrium oxide
Aluminum Oxide
Zirconia
Suspensions
Alumina
Activation energy
Fluxes
Air
Coatings
Microstructure

ASJC Scopus subject areas

  • Biotechnology
  • Chemical Engineering(all)
  • Mechanical Engineering
  • Environmental Engineering
  • Polymers and Plastics

Cite this

Synthesis and oxygen-permeation properties of thin YSZ/Pd composite membranes. / Kim, Jinsoo; Lin, Jerry.

In: AICHE Journal, Vol. 46, No. 8, 08.2000, p. 1521-1529.

Research output: Contribution to journalArticle

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