Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 2911-2919 |
| Seitenumfang | 9 |
| Fachzeitschrift | Chemistry of materials |
| Jahrgang | 27 |
| Ausgabenummer | 8 |
| Frühes Online-Datum | 31 März 2015 |
| Publikationsstatus | Veröffentlicht - 28 Apr. 2015 |
Abstract
Dense single-phase perovskite-type Pr0.6Sr0.4CoxFe1-xO3-δ (0.0 ≤ x ≤ 1.0) membranes (0.6 mm thick) were synthesized via EDTA-citric acid complexing route. Subsequently, the effect of various B-site Co/Fe compositions on oxygen permeability, temperature-dependent CO2 stability, microstructure, and electrical properties of the membranes were studied. The crystal structures and the high-temperature phase stability of the perovskite structure in a CO2-containing atmosphere were analyzed using X-ray diffraction. The highest oxygen permeation flux was observed for Pr0.6Sr0.4CoO3-δ with 1.57 cm3(STP) min-1 cm-2 and 1.37 cm3(STP) min-1 cm-2 at 1000 °C under air/He and air/CO2 gradients, respectively. Furthermore, the effect of CO2 as the sweep gas on the temperature-dependent oxygen permeability and stability of the membranes was studied. Basically, the membranes with lower Co contents were found to be less susceptible to CO2 exposure and their microstructures were less affected by CO2. The partial oxidation of methane (POM) to syngas was successfully performed for more than 80 h at 950 °C using a PSCF membrane with a Co content of x = 0.2. The POM reaction shows an average CH4 conversion rate of >98% and a CO selectivity of >95%.
ASJC Scopus Sachgebiete
- Chemie (insg.)
- Allgemeine Chemie
- Chemische Verfahrenstechnik (insg.)
- Allgemeine chemische Verfahrenstechnik
- Werkstoffwissenschaften (insg.)
- Werkstoffchemie
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in: Chemistry of materials, Jahrgang 27, Nr. 8, 28.04.2015, S. 2911-2919.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Effect of the B-site composition on the oxygen permeability and the CO2 stability of Pr0.6Sr0.4CoxFe1-xO3-δ (0.0 ≤ x ≤ 1.0) membranes
AU - Partovi, Kaveh
AU - Geppert, Benjamin
AU - Liang, Fangyi
AU - Rüscher, Claus H.
AU - Caro, Jürgen
PY - 2015/4/28
Y1 - 2015/4/28
N2 - Dense single-phase perovskite-type Pr0.6Sr0.4CoxFe1-xO3-δ (0.0 ≤ x ≤ 1.0) membranes (0.6 mm thick) were synthesized via EDTA-citric acid complexing route. Subsequently, the effect of various B-site Co/Fe compositions on oxygen permeability, temperature-dependent CO2 stability, microstructure, and electrical properties of the membranes were studied. The crystal structures and the high-temperature phase stability of the perovskite structure in a CO2-containing atmosphere were analyzed using X-ray diffraction. The highest oxygen permeation flux was observed for Pr0.6Sr0.4CoO3-δ with 1.57 cm3(STP) min-1 cm-2 and 1.37 cm3(STP) min-1 cm-2 at 1000 °C under air/He and air/CO2 gradients, respectively. Furthermore, the effect of CO2 as the sweep gas on the temperature-dependent oxygen permeability and stability of the membranes was studied. Basically, the membranes with lower Co contents were found to be less susceptible to CO2 exposure and their microstructures were less affected by CO2. The partial oxidation of methane (POM) to syngas was successfully performed for more than 80 h at 950 °C using a PSCF membrane with a Co content of x = 0.2. The POM reaction shows an average CH4 conversion rate of >98% and a CO selectivity of >95%.
AB - Dense single-phase perovskite-type Pr0.6Sr0.4CoxFe1-xO3-δ (0.0 ≤ x ≤ 1.0) membranes (0.6 mm thick) were synthesized via EDTA-citric acid complexing route. Subsequently, the effect of various B-site Co/Fe compositions on oxygen permeability, temperature-dependent CO2 stability, microstructure, and electrical properties of the membranes were studied. The crystal structures and the high-temperature phase stability of the perovskite structure in a CO2-containing atmosphere were analyzed using X-ray diffraction. The highest oxygen permeation flux was observed for Pr0.6Sr0.4CoO3-δ with 1.57 cm3(STP) min-1 cm-2 and 1.37 cm3(STP) min-1 cm-2 at 1000 °C under air/He and air/CO2 gradients, respectively. Furthermore, the effect of CO2 as the sweep gas on the temperature-dependent oxygen permeability and stability of the membranes was studied. Basically, the membranes with lower Co contents were found to be less susceptible to CO2 exposure and their microstructures were less affected by CO2. The partial oxidation of methane (POM) to syngas was successfully performed for more than 80 h at 950 °C using a PSCF membrane with a Co content of x = 0.2. The POM reaction shows an average CH4 conversion rate of >98% and a CO selectivity of >95%.
UR - http://www.scopus.com/inward/record.url?scp=84928657967&partnerID=8YFLogxK
U2 - 10.1021/acs.chemmater.5b00166
DO - 10.1021/acs.chemmater.5b00166
M3 - Article
AN - SCOPUS:84928657967
VL - 27
SP - 2911
EP - 2919
JO - Chemistry of materials
JF - Chemistry of materials
SN - 0897-4756
IS - 8
ER -