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
- authored by
- 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.
- Organisation(s)
-
Institute of Physical Chemistry and Electrochemistry
- External Organisation(s)
-
Technische Universität Darmstadt
Fraunhofer Research Institution for Materials Recycling and Resource Strategies (IWKS)
- Type
- Article
- Journal
- Membranes
- Volume
- 10
- Pages
- 1-19
- No. of pages
- 19
- Publication date
- 12.08.2020
- Publication status
- Published
- Peer reviewed
- Yes
- ASJC Scopus subject areas
- Chemical Engineering (miscellaneous), Process Chemistry and Technology, Filtration and Separation
- Sustainable Development Goals
- SDG 7 - Affordable and Clean Energy
- Electronic version(s)
-
https://doi.org/10.3390/membranes10080183 (Access:
Open)
