Investigation of oxygen permeation through someperovskite membranes

The oxygen permeation flux through the perovskite membranes of types La0.8Sr0.2Co0.6Fe0.4O3-d (LSCF(8264)) , SrCo0.8Fe0.2O3-d (SCF(82)) and La0.6Sr0.4Co0.8Fe0.2O3-d (LSCF(6482)) was measured as a function of temperature within 1,073–1,223 K as well as the oxygen partial pressure of 0.1–1.0 bar. The oxygen permeation fluxes for the membranes, SCF(82), LSCF(6482), LSCF(8264) with the thickness of 0.85 mm were observed as 9.2 9 10-7 (mol/cm2 s),1.7 9 10-7 (mol/cm2 s), and 1.0 9 10-7 (mol/cm2 s) in these cases at 1,153 K. The results indicated the oxygen permeation process was mainly controlled by the oxygen bulk diffusion through these membranes.

Keywords:

Membrane reactor , Perovskite , Oxygen permeation , Bulk diffusion