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  4. Synthesis and Characterization of 40 wt % Ce0.9Pr0.1O2-d-60 wt % NdxSr1−xFe0.9Cu0.1O3−d Dual-Phase Membranes for Efficient Oxygen Separation
 
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2020
Journal Article
Title

Synthesis and Characterization of 40 wt % Ce0.9Pr0.1O2-d-60 wt % NdxSr1−xFe0.9Cu0.1O3−d Dual-Phase Membranes for Efficient Oxygen Separation

Abstract
Dense, H2- and CO2-resistant, oxygen-permeable 40 wt % Ce0.9Pr0.1O2-d-60 wt % NdxSr1−xFe0.9Cu0.1O3−ddual-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 Ce0.9Pr0.1O2−d-Nd0.5Sr0.5Fe0.9Cu0.1O3−d sample demonstrates outstanding activity and a regenerative ability in the presence of different atmospheres, especially in a reducing atmosphere and pure CO2 atmosphere in comparison with all investigated samples. The oxygen permeation fluxes across a Ce0.9Pr0.1O2−d-Nd0.5Sr0.5Fe0.9Cu0.1O3−d 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/CO2 gradient at T = 1223 K, respectively. In addition, a Ce0.9Pr0.1O2-d-Nd0.5Sr0.5Fe0.9Cu0.1O3-d 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.
Author(s)
Chen, G.
Zhao, Z.
Widenmeyer, M.
Yan, R.
Wang, L.
Feldhoff, A.
Weidenkaff, A.
Journal
Membranes  
Funder
Bundesministerium für Bildung und Forschung BMBF (Deutschland)  
Open Access
DOI
10.3390/membranes10080183
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