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A CO and CO2 tolerating (La0.9Ca0.1)2(Ni0.75Cu0.25)O4+δ Ruddlesden-Popper membrane for oxygen separation

Chen, Guoxing and Widenmeyer, Marc and Tang, Binjie and Kaeswurm, Louise and Wang, Ling and Feldhoff, Armin and Weidenkaff, Anke (2020):
A CO and CO2 tolerating (La0.9Ca0.1)2(Ni0.75Cu0.25)O4+δ Ruddlesden-Popper membrane for oxygen separation.
In: Frontiers of Chemical Science and Engineering, (3), 14. pp. 405-414, ISSN 2095-0179,
DOI: 10.1007/s11705-019-1886-0,
[Online-Edition: https://doi.org/10.1007/s11705-019-1886-0],
[Article]

Abstract

A series of novel dense mixed conducting ceramic membranes based on K2NiF4-type (La1−xCax)2 (Ni0.75Cu0.25)O4+δ was successfully prepared through a sol-gel route. Their chemical compatibility, oxygen permeability, CO and CO2 tolerance, and long-term CO2 resistance regarding phase composition and crystal structure at different atmospheres were studied. The results show that higher Ca contents in the material lead to the formation of CaCO3. A constant oxygen permeation flux of about 0.63 mL·min−1·cm−2 at 1173 K through a 0.65 mm thick membrane was measured for (La0.9Ca0.1)2 (Ni0.75Cu0.25)O4+δ, using either helium or pure CO2 as sweep gas. Steady oxygen fluxes with no sign of deterioration of this membrane were observed with increasing CO2 concentration. The membrane showed excellent chemical stability towards CO2 for more than 1360 h and phase stability in presence of CO for 4 h at high temperature. In addition, this membrane did not deteriorate in a high-energy CO2 plasma. The present work demonstrates that this (La0.9Ca0.1)2(Ni0.75Cu0.25)O4+δ membrane is a promising chemically robust candidate for oxygen separation applications.

Item Type: Article
Erschienen: 2020
Creators: Chen, Guoxing and Widenmeyer, Marc and Tang, Binjie and Kaeswurm, Louise and Wang, Ling and Feldhoff, Armin and Weidenkaff, Anke
Title: A CO and CO2 tolerating (La0.9Ca0.1)2(Ni0.75Cu0.25)O4+δ Ruddlesden-Popper membrane for oxygen separation
Language: English
Abstract:

A series of novel dense mixed conducting ceramic membranes based on K2NiF4-type (La1−xCax)2 (Ni0.75Cu0.25)O4+δ was successfully prepared through a sol-gel route. Their chemical compatibility, oxygen permeability, CO and CO2 tolerance, and long-term CO2 resistance regarding phase composition and crystal structure at different atmospheres were studied. The results show that higher Ca contents in the material lead to the formation of CaCO3. A constant oxygen permeation flux of about 0.63 mL·min−1·cm−2 at 1173 K through a 0.65 mm thick membrane was measured for (La0.9Ca0.1)2 (Ni0.75Cu0.25)O4+δ, using either helium or pure CO2 as sweep gas. Steady oxygen fluxes with no sign of deterioration of this membrane were observed with increasing CO2 concentration. The membrane showed excellent chemical stability towards CO2 for more than 1360 h and phase stability in presence of CO for 4 h at high temperature. In addition, this membrane did not deteriorate in a high-energy CO2 plasma. The present work demonstrates that this (La0.9Ca0.1)2(Ni0.75Cu0.25)O4+δ membrane is a promising chemically robust candidate for oxygen separation applications.

Journal or Publication Title: Frontiers of Chemical Science and Engineering
Journal volume: 14
Number: 3
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 07:04
DOI: 10.1007/s11705-019-1886-0
Official URL: https://doi.org/10.1007/s11705-019-1886-0
Projects: This work is part of the project “Plasma-induced CO2− conversion” (PiCK, project number: 03SFK2S3B) and financially supported by the German Federal Ministry of Education and Research in the framework of the “Kopernikus projects for the Energiewende”., The authors are thankful to B.Sc. Laura Steinle (University of Stuttgart) for her assistance during the CO stability tests, and Christine Stefani and Prof. Dr. Robert Dinnebier (Max Planck Institute for Solid State Research, Stuttgart) for the in situ PXR, G. C. thanks Frank Hack and Dr. Angelika Veziridis for their kind support during experiments and discussions.
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