Issue 35, 2015

Oxygen permeation and stability of Mo-substituted BSCF membranes

Abstract

The oxygen permeation performance of Ba0.5Sr0.5Co0.8−xFe0.2−yMox+yO3−δ (x + y = 0; 0.025; 0.05; 0.25; 0.375 for Co/Fe = 4 and x + y = 0.125 for Co/Fe = 2) ceramic perovskite materials was studied. The effects of the composition, structure, morphology and membrane thickness on permeation flux were investigated. We demonstrate how Mo substitution significantly improves the stability of BSCF membranes not only under static but also dynamic conditions by depressing the degradation rates at 750 °C. The highest permeation flux among the studied membranes was measured for a 1 mm thick Ba0.5Sr0.5Co0.78Fe0.195Mo0.025O3−δ as 1.55 ml min−1 cm−2 at 950 °C which is very close to the flux measured for BSCF (1.65 ml min−1 cm−2) under the same conditions.

Graphical abstract: Oxygen permeation and stability of Mo-substituted BSCF membranes

Supplementary files

Article information

Article type
Paper
Submitted
04 jún 2015
Accepted
28 júl 2015
First published
28 júl 2015

J. Mater. Chem. A, 2015,3, 18265-18272

Author version available

Oxygen permeation and stability of Mo-substituted BSCF membranes

H. Gasparyan, J. B. Claridge and M. J. Rosseinsky, J. Mater. Chem. A, 2015, 3, 18265 DOI: 10.1039/C5TA04046A

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