Details
| Original language | English |
|---|---|
| Pages (from-to) | 4847-4850 |
| Number of pages | 4 |
| Journal | Angewandte Chemie - International Edition |
| Volume | 54 |
| Issue number | 16 |
| Early online date | 23 Feb 2015 |
| Publication status | Published - 13 Apr 2015 |
Abstract
To combine good chemical stability and high oxygen permeability, a mixed ionic-electronic conducting (MIEC) 75 wt % Ce0.85Gd0.1Cu0.05O2−δ-25 wt % La0.6Ca0.4FeO3−δ (CGCO-LCF) dual-phase membrane based on a MIEC–MIEC composite has been developed. Copper doping into Ce0.9Gd0.1O2−δ (CGO) oxide enhances both ionic and electronic conductivity, which then leads to a change from ionic conduction to mixed conduction at elevated temperatures. For the first time we demonstrate that an intergranular film with 2–10 nm thickness containing Ce, Ca, Gd, La, and Fe has been formed between the CGCO grains in the CGCO-LCF one-pot dual-phase membrane. A high oxygen permeation flux of 0.70 mL min−1 cm−2 is obtained by the CGCO-LCF one-pot dual-phase membrane with 0.5 mm thickness at 950 °C using pure CO2 as the sweep gas, and the membrane shows excellent stability in the presence of CO2 even at lower temperatures (800 °C) during long-term operation.
Keywords
- carbon dioxide, electronic conductors, ionic conductors, membranes, oxygen transport
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Chemistry(all)
- General Chemistry
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In: Angewandte Chemie - International Edition, Vol. 54, No. 16, 13.04.2015, p. 4847-4850.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - A Mixed Ionic and Electronic Conducting Dual-Phase Membrane with High Oxygen Permeability
AU - Fang, Wei
AU - Liang, Fangyi
AU - Cao, Zhengwen
AU - Steinbach, Frank
AU - Feldhoff, Armin
N1 - Publisher Copyright: © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2015/4/13
Y1 - 2015/4/13
N2 - To combine good chemical stability and high oxygen permeability, a mixed ionic-electronic conducting (MIEC) 75 wt % Ce0.85Gd0.1Cu0.05O2−δ-25 wt % La0.6Ca0.4FeO3−δ (CGCO-LCF) dual-phase membrane based on a MIEC–MIEC composite has been developed. Copper doping into Ce0.9Gd0.1O2−δ (CGO) oxide enhances both ionic and electronic conductivity, which then leads to a change from ionic conduction to mixed conduction at elevated temperatures. For the first time we demonstrate that an intergranular film with 2–10 nm thickness containing Ce, Ca, Gd, La, and Fe has been formed between the CGCO grains in the CGCO-LCF one-pot dual-phase membrane. A high oxygen permeation flux of 0.70 mL min−1 cm−2 is obtained by the CGCO-LCF one-pot dual-phase membrane with 0.5 mm thickness at 950 °C using pure CO2 as the sweep gas, and the membrane shows excellent stability in the presence of CO2 even at lower temperatures (800 °C) during long-term operation.
AB - To combine good chemical stability and high oxygen permeability, a mixed ionic-electronic conducting (MIEC) 75 wt % Ce0.85Gd0.1Cu0.05O2−δ-25 wt % La0.6Ca0.4FeO3−δ (CGCO-LCF) dual-phase membrane based on a MIEC–MIEC composite has been developed. Copper doping into Ce0.9Gd0.1O2−δ (CGO) oxide enhances both ionic and electronic conductivity, which then leads to a change from ionic conduction to mixed conduction at elevated temperatures. For the first time we demonstrate that an intergranular film with 2–10 nm thickness containing Ce, Ca, Gd, La, and Fe has been formed between the CGCO grains in the CGCO-LCF one-pot dual-phase membrane. A high oxygen permeation flux of 0.70 mL min−1 cm−2 is obtained by the CGCO-LCF one-pot dual-phase membrane with 0.5 mm thickness at 950 °C using pure CO2 as the sweep gas, and the membrane shows excellent stability in the presence of CO2 even at lower temperatures (800 °C) during long-term operation.
KW - carbon dioxide
KW - electronic conductors
KW - ionic conductors
KW - membranes
KW - oxygen transport
UR - http://www.scopus.com/inward/record.url?scp=85027950186&partnerID=8YFLogxK
U2 - 10.1002/anie.201411963
DO - 10.1002/anie.201411963
M3 - Article
AN - SCOPUS:85027950186
VL - 54
SP - 4847
EP - 4850
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
SN - 1433-7851
IS - 16
ER -