| Autor: |
Haihui Wang, Gerd Grubert, Bernd Langanke, Michael Schroeder, Cristina Tablet, Thomas Schiestel, Jürgen Caro |
| Rok vydání: |
2005 |
| Předmět: |
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| Zdroj: |
Catalysis Today. 104:126-130 |
| ISSN: |
0920-5861 |
| DOI: |
10.1016/j.cattod.2005.03.064 |
| Popis: |
The first oxygen permeation data of a dense hollow fiber perovskite membrane based on BaCoxFeyZrzO3 − δ are reported. The hollow fiber was prepared by a phase inversion process. Dense fibers were obtained with the following typical geometries: outer diameter, 800–900 μm; inner diameter, 500–600 μm; length, 30 cm. The O2-permeation through the hollow fiber perovskite membrane was studied in a high-temperature gas permeation cell under different operation conditions. The increase of the helium gas flow rate reduces the oxygen partial pressure ( p O 2 ) on the core side and a higher oxygen permeation flux is observed. High oxygen flux of 0.73 m3 (O2)/(m2 (membrane) h) was achieved at 850 °C under the operation parameters F air (shell side) = 150 ml/min and F He (core side) = 30 ml/min. The oxygen partial pressure dependence of the O2 permeation flux indicated an interplay of both surface reaction and bulk diffusion as rate limiting steps. During 5 days of permeation a high and stable oxygen flux was observed. X-ray diffraction patterns of fresh and spent membranes after the permeation measurements revealed that no degradation after oxygen permeation appears. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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