High oxygen permeation rate in la_0.6sr_0.4ti _0.3fe_0.7o₃ thin membrane on a porous support with multichannel structure for ch₄ partial oxidation

A preparation of La_0.6Sr_0.4Ti_0.3Fe _0.7O₃ (LSTF) perovskite oxide on a support with a unique multichannel structure achieved a high oxygen permeation rate. A LSTF thin membrane with 60μm thickness was successfully prepared on the multichannel support with 30% porosity. The oxygen permeation rate was much improved by using the multichannel structured support, as the permeated oxygen was removed rapidly. On the other hand, partial oxidation of CH₄ into CO and H₂ is dominant on the LSTF membrane. The oxygen permeation rate increased as the thickness of the membrane and the porous support decreased, and a value of 13.3 cm³/(min cm²) was achieved at 1273 K under a CH₄ partial oxidation condition.