Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 31-38 |
| Seitenumfang | 8 |
| Fachzeitschrift | Journal of membrane science |
| Jahrgang | 480 |
| Frühes Online-Datum | 2 Feb. 2015 |
| Publikationsstatus | Veröffentlicht - 5 Apr. 2015 |
Abstract
The performance of perovskite-type oxygen-transporting membranes during CO2 sweeping has been investigated. The series of La1-xSr xCo0.8Fe0.2O3-δ (LSCF) materials with x=1, 0.8, 0.6 and 0.4 (SCF, LSCF2882, LSCF4682, LSCF6482) were synthesized by the sol-gel method and characterized by X-ray diffraction (XRD). To investigate the poisoning effect of CO2 on the phase composition and microstructure of the membranes after long-term oxygen permeation experiments (more than 200h) at 1173K under a CO2 atmosphere, transmission electron microscopy (TEM) investigations were carried out. Electron-energy loss spectroscopy (EELS) and energy-dispersive X-ray spectroscopy (EDXS) revealed the formation of carbonate at the outer surface of the LSCF materials with low lanthanum content, which correlates with a decrease in oxygen permeation flux. Nevertheless, the LSCF 6482 material is tolerant to CO2 gas. No carbonate layer was found after 200h of operation, and the oxygen flux remained stable.
ASJC Scopus Sachgebiete
- Biochemie, Genetik und Molekularbiologie (insg.)
- Biochemie
- Werkstoffwissenschaften (insg.)
- Chemie (insg.)
- Physikalische und Theoretische Chemie
- Chemische Verfahrenstechnik (insg.)
- Filtration und Separation
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in: Journal of membrane science, Jahrgang 480, 05.04.2015, S. 31-38.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Investigation of carbonates in oxygen-transporting membrane ceramics
AU - Ravkina, Olga
AU - Klande, Tobias
AU - Feldhoff, Armin
N1 - Funding Information: The authors sincerely acknowledge financial support from the Chinese-German Center for Science ( GZ676 ) and the Deutsche Forschungsgemeinschaft ( FE 928/4-1 ) as well as fruitful discussions with Prof. Jürgen Caro. Publisher Copyright: © 2015 Elsevier B.V.
PY - 2015/4/5
Y1 - 2015/4/5
N2 - The performance of perovskite-type oxygen-transporting membranes during CO2 sweeping has been investigated. The series of La1-xSr xCo0.8Fe0.2O3-δ (LSCF) materials with x=1, 0.8, 0.6 and 0.4 (SCF, LSCF2882, LSCF4682, LSCF6482) were synthesized by the sol-gel method and characterized by X-ray diffraction (XRD). To investigate the poisoning effect of CO2 on the phase composition and microstructure of the membranes after long-term oxygen permeation experiments (more than 200h) at 1173K under a CO2 atmosphere, transmission electron microscopy (TEM) investigations were carried out. Electron-energy loss spectroscopy (EELS) and energy-dispersive X-ray spectroscopy (EDXS) revealed the formation of carbonate at the outer surface of the LSCF materials with low lanthanum content, which correlates with a decrease in oxygen permeation flux. Nevertheless, the LSCF 6482 material is tolerant to CO2 gas. No carbonate layer was found after 200h of operation, and the oxygen flux remained stable.
AB - The performance of perovskite-type oxygen-transporting membranes during CO2 sweeping has been investigated. The series of La1-xSr xCo0.8Fe0.2O3-δ (LSCF) materials with x=1, 0.8, 0.6 and 0.4 (SCF, LSCF2882, LSCF4682, LSCF6482) were synthesized by the sol-gel method and characterized by X-ray diffraction (XRD). To investigate the poisoning effect of CO2 on the phase composition and microstructure of the membranes after long-term oxygen permeation experiments (more than 200h) at 1173K under a CO2 atmosphere, transmission electron microscopy (TEM) investigations were carried out. Electron-energy loss spectroscopy (EELS) and energy-dispersive X-ray spectroscopy (EDXS) revealed the formation of carbonate at the outer surface of the LSCF materials with low lanthanum content, which correlates with a decrease in oxygen permeation flux. Nevertheless, the LSCF 6482 material is tolerant to CO2 gas. No carbonate layer was found after 200h of operation, and the oxygen flux remained stable.
KW - Carbonate formation
KW - Electron-energy loss spectroscopy
KW - Long-term oxygen permeation
KW - Oxygen-transporting membrane
KW - Transmission electron microscopy
UR - http://www.scopus.com/inward/record.url?scp=84922737379&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2015.01.042
DO - 10.1016/j.memsci.2015.01.042
M3 - Article
AN - SCOPUS:84922737379
VL - 480
SP - 31
EP - 38
JO - Journal of membrane science
JF - Journal of membrane science
SN - 0376-7388
ER -