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

E. Serra, M. Alvisi, E. Casagrande, G. Bezzi, C. Mingazzini and A. La Barbera

Renewable Energy, 2008, vol. 33, issue 2, 241-247

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.

Keywords: Oxygen and Hydrogen permeability; Ceramic membrane; Sr-Fe-Co-oxide; Electronic and ionic conductor (search for similar items in EconPapers)
Date: 2008
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:33:y:2008:i:2:p:241-247

DOI: 10.1016/j.renene.2007.05.028

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