Dense ceramic membranes oxygen permeation through

FIGURE 10.3 (a) Hydrogen and (b) oxygen permeation through dense oxide ceramic membranes. 

Extensively studied is oxygen permeation through dense ceramic membranes (e.g. perovskhes). Temperatures > 600 °C are applied. Here, oxygen splits at the surface and is transited as 0 . Porous membranes include porous polymer films (cellulosics, polyamides) as well as amorphous inorganic materials (alumina, silica). 

R.H.E. Van Doom, H. Kruidhof, H.J.M. Bouwmeester and A.J. Burggraaf, Oxygen permeation through dense ceramic membranes of Sr-doped LaCoOs-s membranes. To be submitted. 

Concerning non-porous membranes, these are categorized as dense ceramic electrolytes such as yttria-stabilized zirconia (YSZ) and perovskite membranes [16], which allow only the permeation of ionic oxygen. Permeation through metal membranes such as palladium and a palladium alloy is based on the selective dissolution of hydrogen and diffusion through the metal membrane. 

Figure 5.1 shows schematically the oxygen permeation through dense ceramic membranes. For the electrolyte membrane, an external circuit is... 

Diethelm, S. and van Herle, J. (2004) Oxygen transport through dense Lao.6Sro.4Feo.8Coo.203 a perovskite-type permeation membranes. /. Eur. Ceram. Soc., 24, 1319-1323. 

---