Details
| Original language | English |
|---|---|
| Pages (from-to) | 44-52 |
| Number of pages | 9 |
| Journal | Journal of membrane science |
| Volume | 293 |
| Issue number | 1-2 |
| Early online date | 1 Feb 2007 |
| Publication status | Published - 20 Apr 2007 |
Abstract
The influence of CO2 on the oxygen permeation performance of perovskite-type (Ba0.5Sr0.5)(Co0.8Fe0.2)O3-δ (BSCF) membranes under different experimental conditions is presented. First, pure CO2 was applied as the sweep gas at 875 °C yielding an immediate cessation of the oxygen permeation. In order to probe the reversibility of this stagnancy, several cycles of changing the sweep gas between helium and CO2 were conducted. The analysis of the microstructure after permeation experiments were carried out by transmission electron microscopy (TEM), X-ray diffraction (XRD) as well as by scanning electron microscopy (SEM). It was found that both microstructure as well as oxygen permeation are recovered in a helium atmosphere. Additionally, long-time treatment with pure CO2 for 72 h on the permeate side and the concentration effect of CO2 in the sweep gas were accomplished showing that the perovskite structure is impaired only up to a depth of 50 μm. Further on, the impact of CO2 on the feed side was examined by adding certain amounts of CO2 to the feed air. It was found that the impact of CO2 on the oxygen permeation applied in the sweep gas is superior to that applied on the feed gas.
Keywords
- BSCF, Carbonate, CO, Oxygen permeation, Perovskite
ASJC Scopus subject areas
- Biochemistry, Genetics and Molecular Biology(all)
- Biochemistry
- Materials Science(all)
- General Materials Science
- Chemistry(all)
- Physical and Theoretical Chemistry
- Chemical Engineering(all)
- Filtration and Separation
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In: Journal of membrane science, Vol. 293, No. 1-2, 20.04.2007, p. 44-52.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Influence of CO2 on the oxygen permeation performance and the microstructure of perovskite-type (Ba0.5Sr0.5)(Co0.8Fe0.2)O3-δ membranes
AU - Arnold, Mirko
AU - Wang, Haihui
AU - Feldhoff, Armin
N1 - Funding Information: The authors greatly acknowledge the financial support by DFG grant no. FE 928/1-1 and fruitful discussions with Prof. Jürgen Caro.
PY - 2007/4/20
Y1 - 2007/4/20
N2 - The influence of CO2 on the oxygen permeation performance of perovskite-type (Ba0.5Sr0.5)(Co0.8Fe0.2)O3-δ (BSCF) membranes under different experimental conditions is presented. First, pure CO2 was applied as the sweep gas at 875 °C yielding an immediate cessation of the oxygen permeation. In order to probe the reversibility of this stagnancy, several cycles of changing the sweep gas between helium and CO2 were conducted. The analysis of the microstructure after permeation experiments were carried out by transmission electron microscopy (TEM), X-ray diffraction (XRD) as well as by scanning electron microscopy (SEM). It was found that both microstructure as well as oxygen permeation are recovered in a helium atmosphere. Additionally, long-time treatment with pure CO2 for 72 h on the permeate side and the concentration effect of CO2 in the sweep gas were accomplished showing that the perovskite structure is impaired only up to a depth of 50 μm. Further on, the impact of CO2 on the feed side was examined by adding certain amounts of CO2 to the feed air. It was found that the impact of CO2 on the oxygen permeation applied in the sweep gas is superior to that applied on the feed gas.
AB - The influence of CO2 on the oxygen permeation performance of perovskite-type (Ba0.5Sr0.5)(Co0.8Fe0.2)O3-δ (BSCF) membranes under different experimental conditions is presented. First, pure CO2 was applied as the sweep gas at 875 °C yielding an immediate cessation of the oxygen permeation. In order to probe the reversibility of this stagnancy, several cycles of changing the sweep gas between helium and CO2 were conducted. The analysis of the microstructure after permeation experiments were carried out by transmission electron microscopy (TEM), X-ray diffraction (XRD) as well as by scanning electron microscopy (SEM). It was found that both microstructure as well as oxygen permeation are recovered in a helium atmosphere. Additionally, long-time treatment with pure CO2 for 72 h on the permeate side and the concentration effect of CO2 in the sweep gas were accomplished showing that the perovskite structure is impaired only up to a depth of 50 μm. Further on, the impact of CO2 on the feed side was examined by adding certain amounts of CO2 to the feed air. It was found that the impact of CO2 on the oxygen permeation applied in the sweep gas is superior to that applied on the feed gas.
KW - BSCF
KW - Carbonate
KW - CO
KW - Oxygen permeation
KW - Perovskite
UR - http://www.scopus.com/inward/record.url?scp=33947327722&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2007.01.032
DO - 10.1016/j.memsci.2007.01.032
M3 - Article
AN - SCOPUS:33947327722
VL - 293
SP - 44
EP - 52
JO - Journal of membrane science
JF - Journal of membrane science
SN - 0376-7388
IS - 1-2
ER -