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

Chen, Guoxing; Zhao, Zhijun; Widenmeyer, Marc; Yan, Ruijuan; Wang, Ling; Feldhoff, Armin; Weidenkaff, Anke

doi:10.3390/membranes10080183

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Synthesis and Characterization of 40 wt % Ce_0.9Pr_0.1O_2–δ–60 wt % Nd_xSr_1−xFe_0.9Cu_0.1O_3−δ Dual-Phase Membranes for Efficient Oxygen Separation

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Department of Materials and Earth Sciences, Technische Universität Darmstadt, Alarich-Weiss-Str. 2, 64287 Darmstadt, Germany

Institute of Physical Chemistry and Electrochemistry, Leibniz University Hannover, Callinstr. 3A, 30167 Hannover, Germany

Fraunhofer Research Institution for Materials Recycling and Resource Strategies IWKS, Brentanostraße 2a, 63755 Alzenau, Germany

Authors to whom correspondence should be addressed.

Membranes 2020, 10(8), 183; https://doi.org/10.3390/membranes10080183

Received: 27 July 2020 / Accepted: 10 August 2020 / Published: 12 August 2020

(This article belongs to the Special Issue Oxygen Transport Membranes: Synthesis and Applications)

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Abstract

Dense, H₂- and CO₂-resistant, oxygen-permeable 40 wt % Ce_0.9Pr_0.1O_2–_δ–60 wt % Nd_xSr_1−xFe_0.9Cu_0.1O₃₋_δdual-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_0.9Pr_0.1O₂₋_δ–Nd_0.5Sr_0.5Fe_0.9Cu_0.1O₃₋_δ 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 Ce_0.9Pr_0.1O₂₋_δ–Nd_0.5Sr_0.5Fe_0.9Cu_0.1O₃₋_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/CO₂ gradient at T = 1223 K, respectively. In addition, a Ce_0.9Pr_0.1O_2–_δ–Nd_0.5Sr_0.5Fe_0.9Cu_0.1O_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. View Full-Text

Keywords: oxygen separation; dual-phase membrane; CO₂ tolerance; long-term stability; regenerative ability

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Chen, G.; Zhao, Z.; Widenmeyer, M.; Yan, R.; Wang, L.; Feldhoff, A.; Weidenkaff, A. Synthesis and Characterization of 40 wt % Ce_0.9Pr_0.1O_2–δ–60 wt % Nd_xSr_1−xFe_0.9Cu_0.1O_3−δ Dual-Phase Membranes for Efficient Oxygen Separation. Membranes 2020, 10, 183. https://doi.org/10.3390/membranes10080183

AMA Style

Chen G, Zhao Z, Widenmeyer M, Yan R, Wang L, Feldhoff A, Weidenkaff A. Synthesis and Characterization of 40 wt % Ce_0.9Pr_0.1O_2–δ–60 wt % Nd_xSr_1−xFe_0.9Cu_0.1O_3−δ Dual-Phase Membranes for Efficient Oxygen Separation. Membranes. 2020; 10(8):183. https://doi.org/10.3390/membranes10080183

Chicago/Turabian Style

Chen, Guoxing, Zhijun Zhao, Marc Widenmeyer, Ruijuan Yan, Ling Wang, Armin Feldhoff, and Anke Weidenkaff. 2020. "Synthesis and Characterization of 40 wt % Ce_0.9Pr_0.1O_2–δ–60 wt % Nd_xSr_1−xFe_0.9Cu_0.1O_3−δ Dual-Phase Membranes for Efficient Oxygen Separation" Membranes 10, no. 8: 183. https://doi.org/10.3390/membranes10080183

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Synthesis and Characterization of 40 wt % Ce_0.9Pr_0.1O_2–δ–60 wt % Nd_xSr_1−xFe_0.9Cu_0.1O_3−δ Dual-Phase Membranes for Efficient Oxygen Separation

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