Synthesis and characterization of 40 wt % ce 0.9 pr 0.1 o 2–δ –60 wt % nd x sr 1−x fe 0.9 cu 0.1 o 3dual-phase membranes for efficient oxygen separation
- verfasst von
- Guoxing Chen, Zhijun Zhao, Marc Widenmeyer, Ruijuan Yan, Ling Wang, Armin Feldhoff, Anke Weidenkaff
- Abstract
Dense, H
2-and CO
2-resistant, oxygen-permeable 40 wt % Ce
0.9 Pr
0.1 O
2–δ –60 wt % Nd
x Sr
1−x Fe
0.9 Cu
0.1 O
3−δ dual-phase membranes were prepared in a one-pot process. These Nd-containing dual-phase membranes have up to 60% lower material costs than many classically used dual-phase materials. The Ce
0.9 Pr
0.1 O
2−δ –Nd
0.5 Sr
0.5 Fe
0.9 Cu
0.1 O
3−δ sample demonstrates outstanding activity and a regenerative ability in the presence of different atmospheres, especially in a reducing atmosphere and pure CO
2 atmosphere in comparison with all investigated samples. The oxygen permeation fluxes across a Ce
0.9 Pr
0.1 O
2−δ –Nd
0.5 Sr
0.5 Fe
0.9 Cu
0.1 O
3−δ membrane reached up to 1.02 mL min
−1 cm
−2 and 0.63 mL min
−1 cm
−2 under an air/He and air/CO
2 gradient at T = 1223 K, respectively. In addition, a Ce
0.9 Pr
0.1 O
2–δ –Nd
0.5 Sr
0.5 Fe
0.9 Cu
0.1 O
3–δ membrane (0.65 mm thickness) shows excellent long-term self-healing stability for 125 h. The repeated membrane fabrication delivered oxygen permeation fluxes had a deviation of less than 5%. These results indicate that this highly renewable dual-phase membrane is a potential candidate for long lifetime, high temperature gas separation applications and coupled reaction–separation processes.
- Organisationseinheit(en)
-
Institut für Physikalische Chemie und Elektrochemie
- Externe Organisation(en)
-
Technische Universität Darmstadt
Fraunhofer-Einrichtung für Wertstoffkreisläufe und Ressourcenstrategie (IWKS)
- Typ
- Artikel
- Journal
- Membranes
- Band
- 10
- Seiten
- 1-19
- Anzahl der Seiten
- 19
- Publikationsdatum
- 12.08.2020
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Chemische Verfahrenstechnik (sonstige), Prozesschemie und -technologie, Filtration und Separation
- Ziele für nachhaltige Entwicklung
- SDG 7 – Erschwingliche und saubere Energie
- Elektronische Version(en)
-
https://doi.org/10.3390/membranes10080183 (Zugang:
Offen)
