Comparison of oxygen permeability and stability of perovskite type La{sub 0.2}A{sub 0.8}Co{sub 0.2}Fe{sub 0.8}O{sub 3{minus}{delta}} (A = Sr, Ba, Ca) membranes

Journal Article · Sun Aug 01 00:00:00 EDT 1999 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie9900014· OSTI ID:691438

Li, S; Jin, W; Huang, P; Xu, N; Shi, J ^[1]; Lin, Y S ^[2]; Hu, M Z.C.; Payzant, E A ^[3]

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1. Nanjing Univ. of Chemical Technology (China). Membrane Science and Technology Research Center
2. Univ. of Cincinnati, OH (United States). Dept. of Chemical Engineering
3. Oak Ridge National Lab., TN (United States)

The oxygen permeation and stability of La{sub 0.2}A{sub 0.8}Co{sub 0.2}Fe{sub 0.8}O{sub 3{minus}{delta}} (A = Sr, Ba, Ca) perovskite-type membranes were studied at high temperatures and low oxygen partial pressures. The oxygen vacancy diffusivity and concentration gradient calculated from the unsteady-state and steady-state oxygen data for the three membranes decrease in the order of Sr > Ba > Ca. The activation energies for oxygen permeation increase in the order of Sr < Ba

• OSTI ID: 691438
• Journal Information: Industrial and Engineering Chemistry Research, Vol. 38, Issue 8; Other Information: PBD: Aug 1999
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
36 MATERIALS SCIENCE
MEMBRANES
PERMEABILITY
STABILITY
LANTHANUM OXIDES
COBALT OXIDES
IRON OXIDES
STRONTIUM OXIDES
BARIUM OXIDES
CALCIUM OXIDES
OXYGEN
MEMBRANE TRANSPORT
ACTIVATION ENERGY