Long-term operation of a La0.58Sr0.4Co0.2Fe0.8O3−δ-membrane for oxygen separation
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D. Schlehuber
, a, 
, E. Wessela, L. Singheisera and T. Markusa
Received 22 September 2009;
revised 8 December 2009;
accepted 9 January 2010.
Available online 25 January 2010.
Abstract
During the long-term operation of a La0.58Sr0.4Co0.2Fe0.8O3−δ (LSCF) membrane at 800 °C for nearly 3000 h, a stable permeation flux of (0.15 ± 0.01) ml cm−2 min−1 oxygen was achieved. Nevertheless degradation of the membrane surfaces due to kinetic demixing of mobile cations was observed. Different oxide layers were found on the feed and the permeate surfaces of the membrane.
Keywords: Kinetic demixing; Kinetic decomposition; Perovskite; Long-term operation; Permeation measurement; MIEC membrane; Degradation
Article Outline
- 1. Introduction
- 2. Experimental
- 3. Results
- 4. Discussion
- 5. Conclusion
- Acknowledgements
- References
- 2. Experimental
Fig. 6. SEM picture of a cross fracture of the LSCF membrane after 3000 h of operation. (a) Sweep side. (b and c) Feed side.
