TU Darmstadt / ULB / TUbiblio

High flux and CO2-resistance of La0.6Ca0.4Co1–Fe O3− oxygen-transporting membranes

Chen, Guoxing and Liu, Wenmei and Widenmeyer, Marc and Ying, Pingjun and Dou, Maofeng and Xie, Wenjie and Bubeck, Cora and Wang, Ling and Fyta, Maria and Feldhoff, Armin and Weidenkaff, Anke (2019):
High flux and CO2-resistance of La0.6Ca0.4Co1–Fe O3− oxygen-transporting membranes.
In: Journal of Membrane Science, 590. p. 117082, ISSN 03767388,
DOI: 10.1016/j.memsci.2019.05.007,
[Online-Edition: https://doi.org/10.1016/j.memsci.2019.05.007],
[Article]

Abstract

Most of the currently used perovskite-based oxygen-transporting membranes have insufficient resistance towards CO2 and high material costs that potentially limit their commercial applications. In the present work, a highly CO2-tolerant oxygen permeation membrane based on La0.6Ca0.4Co1–xFexO3−δ (x = 0, 0.3, 0.5, 0.7, 1) was designed and prepared by a scalable reverse co-precipitation method. The oxygen permeation flux through the dense membranes was evaluated and found to be highly dependent on the Co/Fe ratio. La0.6Ca0.4Co0.3Fe0.7O3−δ possessed the highest permeation flux among the investigated samples, achieving 0.76 ml min−1 cm−2 under an Air/He gradient and 0.5 ml min−1 cm−2 under an Air/CO2 gradient at 1173 K for a 1 mm thick membrane. A combination study of first principles calculations and experimental measurements was conducted to advance the understanding of Co/Fe ratio effects on the oxygen migration behavior in La0.6Ca0.4Co1–xFexO3−δ. The observed oxygen permeability is three times higher than that reported in literature under similar conditions. The presented results demonstrate that this highly CO2-tolerant membrane is a promising candidate for high temperature oxygen separation applications.

Item Type: Article
Erschienen: 2019
Creators: Chen, Guoxing and Liu, Wenmei and Widenmeyer, Marc and Ying, Pingjun and Dou, Maofeng and Xie, Wenjie and Bubeck, Cora and Wang, Ling and Fyta, Maria and Feldhoff, Armin and Weidenkaff, Anke
Title: High flux and CO2-resistance of La0.6Ca0.4Co1–Fe O3− oxygen-transporting membranes
Language: English
Abstract:

Most of the currently used perovskite-based oxygen-transporting membranes have insufficient resistance towards CO2 and high material costs that potentially limit their commercial applications. In the present work, a highly CO2-tolerant oxygen permeation membrane based on La0.6Ca0.4Co1–xFexO3−δ (x = 0, 0.3, 0.5, 0.7, 1) was designed and prepared by a scalable reverse co-precipitation method. The oxygen permeation flux through the dense membranes was evaluated and found to be highly dependent on the Co/Fe ratio. La0.6Ca0.4Co0.3Fe0.7O3−δ possessed the highest permeation flux among the investigated samples, achieving 0.76 ml min−1 cm−2 under an Air/He gradient and 0.5 ml min−1 cm−2 under an Air/CO2 gradient at 1173 K for a 1 mm thick membrane. A combination study of first principles calculations and experimental measurements was conducted to advance the understanding of Co/Fe ratio effects on the oxygen migration behavior in La0.6Ca0.4Co1–xFexO3−δ. The observed oxygen permeability is three times higher than that reported in literature under similar conditions. The presented results demonstrate that this highly CO2-tolerant membrane is a promising candidate for high temperature oxygen separation applications.

Journal or Publication Title: Journal of Membrane Science
Journal volume: 590
Uncontrolled Keywords: Perovskite, Oxygen permeation membrane, CO2 resistance, DFT, Oxygen vacancy migration energy, Oxygen vacancy formation energy
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Materials and Resources
Date Deposited: 20 May 2020 06:47
DOI: 10.1016/j.memsci.2019.05.007
Official URL: https://doi.org/10.1016/j.memsci.2019.05.007
Export:
Suche nach Titel in: TUfind oder in Google
Send an inquiry Send an inquiry

Options (only for editors)
Show editorial Details Show editorial Details