Influence of Microstructure and Surface Activation of Dual-Phase Membrane Ce0.8Gd0.2O2-δ-FeCo2O4 on Oxygen Permeation

Madhumidha Ramasamy; Stefan Baumann; Justinas Palisaitis; Falk Schulze-Küppers; Maria Balaguer; Daejin Kim; Wilhelm A. Meulenberg; Jochim Mayer; Ramesh Bhave; Olivier Guillon; Martin Bram

doi:10.1111/jace.13938

Influence of Microstructure and Surface Activation of Dual-Phase Membrane Ce_0.8Gd_0.2O_2-δ-FeCo₂O₄ on Oxygen Permeation

Madhumidha Ramasamy, Stefan Baumann, Justinas Palisaitis, Falk Schulze-Küppers, Maria Balaguer, Daejin Kim, Wilhelm A. Meulenberg, Jochim Mayer, Ramesh Bhave, Olivier Guillon, Martin Bram

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Abstract

Dual-phase oxygen transport membranes are fast-growing research interest for application in oxyfuel combustion process. One such potential candidate is CGO-FCO (60 wt% Ce_0.8Gd_0.2O_2-δ-40 wt% FeCo₂O₄) identified to provide good oxygen permeation flux with substantial stability in harsh atmosphere. Dense CGO-FCO membranes of 1 mm thickness were fabricated by sintering dry pellets pressed from powders synthesized by one-pot method (modified Pechini process) at 1200°C for 10 h. Microstructure analysis indicates presence of a third orthorhombic perovskite phase in the sintered composite. It was also identified that the spinel phase tends to form an oxygen deficient phase at the grain boundary of spinel and CGO phases. Surface exchange limitation of the membranes was overcome by La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ (LSCF) porous layer coating over the composite. The oxygen permeation flux of the CGO-FCO screen printed with a porous layer of 10 μm thick LSCF is 0.11 mL/cm² per minute at 850°C with argon as sweep and air as feed gas at the rates of 50 and 250 mL/min.

Original language	English
Pages (from-to)	349-355
Number of pages	7
Journal	Journal of the American Ceramic Society
Volume	99
Issue number	1
DOIs	https://doi.org/10.1111/jace.13938
State	Published - Jan 1 2016

Funding

This work is supported by the German Federal Ministry of Education and Research (BMBF) and the European Commission via the FP7 project GREENCC (Grant Agreement no. 608524). The authors thank Dr. D. Sebold and Dr. J. Sohn for SEM and XRD analyses, respectively and Mr. S. Heinz for his technical assistance in sample preparation (all Forschungszentrum Juelich GmbH, IEK-1).

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10.1111/jace.13938

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Ramasamy, M., Baumann, S., Palisaitis, J., Schulze-Küppers, F., Balaguer, M., Kim, D., Meulenberg, W. A., Mayer, J., Bhave, R., Guillon, O., & Bram, M. (2016). Influence of Microstructure and Surface Activation of Dual-Phase Membrane Ce_0.8Gd_0.2O_2-δ-FeCo₂O₄ on Oxygen Permeation. Journal of the American Ceramic Society, 99(1), 349-355. https://doi.org/10.1111/jace.13938

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title = "Influence of Microstructure and Surface Activation of Dual-Phase Membrane Ce0.8Gd0.2O2-δ-FeCo2O4 on Oxygen Permeation",

abstract = "Dual-phase oxygen transport membranes are fast-growing research interest for application in oxyfuel combustion process. One such potential candidate is CGO-FCO (60 wt\% Ce0.8Gd0.2O2-δ-40 wt\% FeCo2O4) identified to provide good oxygen permeation flux with substantial stability in harsh atmosphere. Dense CGO-FCO membranes of 1 mm thickness were fabricated by sintering dry pellets pressed from powders synthesized by one-pot method (modified Pechini process) at 1200°C for 10 h. Microstructure analysis indicates presence of a third orthorhombic perovskite phase in the sintered composite. It was also identified that the spinel phase tends to form an oxygen deficient phase at the grain boundary of spinel and CGO phases. Surface exchange limitation of the membranes was overcome by La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) porous layer coating over the composite. The oxygen permeation flux of the CGO-FCO screen printed with a porous layer of 10 μm thick LSCF is 0.11 mL/cm2 per minute at 850°C with argon as sweep and air as feed gas at the rates of 50 and 250 mL/min.",

author = "Madhumidha Ramasamy and Stefan Baumann and Justinas Palisaitis and Falk Schulze-K{\"u}ppers and Maria Balaguer and Daejin Kim and Meulenberg, \{Wilhelm A.\} and Jochim Mayer and Ramesh Bhave and Olivier Guillon and Martin Bram",

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Ramasamy, M, Baumann, S, Palisaitis, J, Schulze-Küppers, F, Balaguer, M, Kim, D, Meulenberg, WA, Mayer, J, Bhave, R, Guillon, O & Bram, M 2016, 'Influence of Microstructure and Surface Activation of Dual-Phase Membrane Ce_0.8Gd_0.2O_2-δ-FeCo₂O₄ on Oxygen Permeation', Journal of the American Ceramic Society, vol. 99, no. 1, pp. 349-355. https://doi.org/10.1111/jace.13938

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T1 - Influence of Microstructure and Surface Activation of Dual-Phase Membrane Ce0.8Gd0.2O2-δ-FeCo2O4 on Oxygen Permeation

AU - Ramasamy, Madhumidha

AU - Baumann, Stefan

AU - Palisaitis, Justinas

AU - Schulze-Küppers, Falk

AU - Balaguer, Maria

AU - Kim, Daejin

AU - Meulenberg, Wilhelm A.

AU - Mayer, Jochim

AU - Bhave, Ramesh

AU - Guillon, Olivier

AU - Bram, Martin

PY - 2016/1/1

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N2 - Dual-phase oxygen transport membranes are fast-growing research interest for application in oxyfuel combustion process. One such potential candidate is CGO-FCO (60 wt% Ce0.8Gd0.2O2-δ-40 wt% FeCo2O4) identified to provide good oxygen permeation flux with substantial stability in harsh atmosphere. Dense CGO-FCO membranes of 1 mm thickness were fabricated by sintering dry pellets pressed from powders synthesized by one-pot method (modified Pechini process) at 1200°C for 10 h. Microstructure analysis indicates presence of a third orthorhombic perovskite phase in the sintered composite. It was also identified that the spinel phase tends to form an oxygen deficient phase at the grain boundary of spinel and CGO phases. Surface exchange limitation of the membranes was overcome by La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) porous layer coating over the composite. The oxygen permeation flux of the CGO-FCO screen printed with a porous layer of 10 μm thick LSCF is 0.11 mL/cm2 per minute at 850°C with argon as sweep and air as feed gas at the rates of 50 and 250 mL/min.

AB - Dual-phase oxygen transport membranes are fast-growing research interest for application in oxyfuel combustion process. One such potential candidate is CGO-FCO (60 wt% Ce0.8Gd0.2O2-δ-40 wt% FeCo2O4) identified to provide good oxygen permeation flux with substantial stability in harsh atmosphere. Dense CGO-FCO membranes of 1 mm thickness were fabricated by sintering dry pellets pressed from powders synthesized by one-pot method (modified Pechini process) at 1200°C for 10 h. Microstructure analysis indicates presence of a third orthorhombic perovskite phase in the sintered composite. It was also identified that the spinel phase tends to form an oxygen deficient phase at the grain boundary of spinel and CGO phases. Surface exchange limitation of the membranes was overcome by La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) porous layer coating over the composite. The oxygen permeation flux of the CGO-FCO screen printed with a porous layer of 10 μm thick LSCF is 0.11 mL/cm2 per minute at 850°C with argon as sweep and air as feed gas at the rates of 50 and 250 mL/min.

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IS - 1

ER -

Influence of Microstructure and Surface Activation of Dual-Phase Membrane Ce_0.8Gd_0.2O_2-δ-FeCo₂O₄ on Oxygen Permeation

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