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Oxygen- and hydrogen-permeation measurements on-mixed conducting SrFeCo0.5Oy ceramic membrane material

Author

Listed:
  • Serra, E.
  • Alvisi, M.
  • Casagrande, E.
  • Bezzi, G.
  • Mingazzini, C.
  • La Barbera, A.

Abstract

The SrFeCo0.5Oy system combines high electronic/ionic conductivity with appreciable oxygen permeability at elevated temperatures. This system has potential use in high-temperature electrochemical applications such as solid oxide fuel cells, batteries, sensors, and oxygen separation membranes. Dense ceramic membranes of SrFeCo0.5Oy are prepared by pressing a ceramic powder prepared by using a sol–gel combustion technique. Oxygen and hydrogen permeation at high temperature on this material are studied. Measurements are conducted using a time-dependent permeation method at the temperature in the range of 1073–1273K with oxygen- and hydrogen-driving pressures in the range (3×102)–(1×105)Pa (300–1000mbar). The maximum oxygen-permeated flux at 1273K is 6.5×10−3molm−2s−1. The activation energies for the O2-permeation fluxes and diffusivities are 240 and 194kJ/mol, respectively. Due to the high fragility, the high temperature for the measurements and the high oxygen permeation through such material, a special membrane holder, and compression sealing system have been designed and realized for the permeation apparatus.

Suggested Citation

  • Serra, E. & Alvisi, M. & Casagrande, E. & Bezzi, G. & Mingazzini, C. & La Barbera, A., 2008. "Oxygen- and hydrogen-permeation measurements on-mixed conducting SrFeCo0.5Oy ceramic membrane material," Renewable Energy, Elsevier, vol. 33(2), pages 241-247.
    • Handle: RePEc:eee:renene:v:33:y:2008:i:2:p:241-247
    DOI: 10.1016/j.renene.2007.05.028
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