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

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