Details
| Original language | English |
|---|---|
| Pages (from-to) | 2255-2259 |
| Number of pages | 5 |
| Journal | SOLID STATE IONICS |
| Volume | 177 |
| Issue number | 26-32 SPEC. ISS. |
| Early online date | 7 Jul 2006 |
| Publication status | Published - 31 Oct 2006 |
Abstract
Phase inversion spinning technique was employed to prepare dense perovskite hollow fiber membranes made from composition BaCoxFeyZrzO3-δ (BCFZ, x + y + z = 1.0). Scanning electron microscope (SEM) shows that such hollow fibers have an asymmetric structure, which is favored to the oxygen permeation. An oxygen permeation flux of 7.6 cm3/min cm2 at 900 °C under an oxygen gradient of 0.209 × 105 Pa/0.065 × 105 Pa was achieved. From the Wagner Theory, the oxygen permeation through the hollow fiber membrane is controlled by both bulk diffusion and surface exchange. The elements composition of fresh fiber and the fiber after long-term experiments were analyzed by energy-dispersive X-ray spectra (EDXS). Compared to the fresh fiber, sulphur was found on the tested hollow fiber membrane surface exposed to the air side and in the bulk, and Ba segregations occur on the tested hollow fiber membrane surface exposed to the air side. A decrease of the oxygen permeation flux was observed, which was probably due to the sulphur poisoning.
Keywords
- Hollow fiber, Mixed conductor, Oxygen separation, Perovskite
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: SOLID STATE IONICS, Vol. 177, No. 26-32 SPEC. ISS., 31.10.2006, p. 2255-2259.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Mixed oxygen ion and electron conducting hollow fiber membranes for oxygen separation
AU - Wang, Haihui
AU - Schiestel, Thomas
AU - Tablet, Cristina
AU - Schroeder, Michael
AU - Caro, Jürgen
PY - 2006/10/31
Y1 - 2006/10/31
N2 - Phase inversion spinning technique was employed to prepare dense perovskite hollow fiber membranes made from composition BaCoxFeyZrzO3-δ (BCFZ, x + y + z = 1.0). Scanning electron microscope (SEM) shows that such hollow fibers have an asymmetric structure, which is favored to the oxygen permeation. An oxygen permeation flux of 7.6 cm3/min cm2 at 900 °C under an oxygen gradient of 0.209 × 105 Pa/0.065 × 105 Pa was achieved. From the Wagner Theory, the oxygen permeation through the hollow fiber membrane is controlled by both bulk diffusion and surface exchange. The elements composition of fresh fiber and the fiber after long-term experiments were analyzed by energy-dispersive X-ray spectra (EDXS). Compared to the fresh fiber, sulphur was found on the tested hollow fiber membrane surface exposed to the air side and in the bulk, and Ba segregations occur on the tested hollow fiber membrane surface exposed to the air side. A decrease of the oxygen permeation flux was observed, which was probably due to the sulphur poisoning.
AB - Phase inversion spinning technique was employed to prepare dense perovskite hollow fiber membranes made from composition BaCoxFeyZrzO3-δ (BCFZ, x + y + z = 1.0). Scanning electron microscope (SEM) shows that such hollow fibers have an asymmetric structure, which is favored to the oxygen permeation. An oxygen permeation flux of 7.6 cm3/min cm2 at 900 °C under an oxygen gradient of 0.209 × 105 Pa/0.065 × 105 Pa was achieved. From the Wagner Theory, the oxygen permeation through the hollow fiber membrane is controlled by both bulk diffusion and surface exchange. The elements composition of fresh fiber and the fiber after long-term experiments were analyzed by energy-dispersive X-ray spectra (EDXS). Compared to the fresh fiber, sulphur was found on the tested hollow fiber membrane surface exposed to the air side and in the bulk, and Ba segregations occur on the tested hollow fiber membrane surface exposed to the air side. A decrease of the oxygen permeation flux was observed, which was probably due to the sulphur poisoning.
KW - Hollow fiber
KW - Mixed conductor
KW - Oxygen separation
KW - Perovskite
UR - http://www.scopus.com/inward/record.url?scp=33750360541&partnerID=8YFLogxK
U2 - 10.1016/j.ssi.2006.05.039
DO - 10.1016/j.ssi.2006.05.039
M3 - Article
AN - SCOPUS:33750360541
VL - 177
SP - 2255
EP - 2259
JO - SOLID STATE IONICS
JF - SOLID STATE IONICS
SN - 0167-2738
IS - 26-32 SPEC. ISS.
ER -