Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 322, Issue 1, Pages 214-217Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2008.05.038
Keywords
perovskite; hollow fiber; gas separation; oxygen; oxygen ion conductor
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Funding
- German BMBF [03C0343A]
- National Natural Science Foundation of China [20706020]
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A dense perovskite hollow fiber made of BaCo(x)Fe(y)Zr(z)O(3-delta) (BCFZ) was evaluated for the oxygen separation at low temperatures (400-500 degrees C). An oxygen permeation flux of 0.45 ml/min cm(2) was obtained at 500 degrees C, which is the first oxygen permeation data reported at such low temperature so far. A degradation of the oxygen permeation at 500 degrees C was observed, but the oxygen fluxes through the hollow fiber membrane can be regenerated by thermal treatment at 925 degrees C for 1 h in air. Energy-dispersive X-ray spectroscopy (EDXS) shows that a strong element segregation occurs in the membrane during operation at low temperature. (c) 2008 Elsevier B.V. All rights reserved.
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