High-Performance Microchanneled Asymmetric Gd0.1Ce0.9O1.95-δ-La0.6Sr0.4FeO3-δ-Based Membranes for Oxygen Separation

Shiyang Cheng; Hua Huang; Simona Ovtar; Søren Bredmose Simonsen; Ming Chen; Wei Zhang; Martin Søgaard; Andreas Kaiser; Peter Vang Hendriksen; Chusheng Chen

doi:10.1021/acsami.5b10714

High-Performance Microchanneled Asymmetric Gd_0.1Ce_0.9O_1.95-δ-La_0.6Sr0.4FeO_3-δ-Based Membranes for Oxygen Separation

Shiyang Cheng, Hua Huang, Simona Ovtar, Søren Bredmose Simonsen, Ming Chen, Wei Zhang, Martin Søgaard, Andreas Kaiser, Peter Vang Hendriksen, Chusheng Chen

Department of Energy Conversion and Storage

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Abstract

A microchanneled asymmetric dual phase composite membrane of 70 vol % Gd0.1Ce0.9O1.95-delta-30 vol % La0.6Sr0.4FeO3-delta (CGO-LSF) was fabricated by a "one step" phase-inversion tape casting. The sample consists of a thin dense membrane (100 mu m) and a porous substrate including "finger-like" microchannels. The oxygen permeation flux through the membrane with and without catalytic surface layers was investigated under a variety of oxygen partial pressure gradients. At 900 degrees C, the oxygen permeation flux of the bare membrane was 1.6 (STP) ml cm(-2) min(-1) for the air/He-case and 10.10 (STP) ml cm(-2) min(-1) for the air/CO-case. Oxygen, flux measurements as well as electrical conductivity relaxation show that the oxygen flux through the bare membrane without catalyst is limited by the oxygen surface exchange. The surface exchange can be enhanced by introduction of catalyst on the membrane surface. An increase of the 50 150 oxygen flux of-4.49 (STP) mL cm(-2) min(-1) at 900 degrees C was observed when catalyst is added for the air/He-case. Mass transfer polarization through the finger-like support was confirmed to be negligible, which benefits the overall performance. A stable flux of 7.00 (STP) ml cm(-2) min(-1) was observed between air/CO/CO2 over 200 h at 850 degrees C. Partial surface decomposition was observed on the permeate side exposed to CO, in line with predictions from thermodynamic calculations. In a mixture of CO, CO2, H-2, and H2O at similar oxygen activity the material will according to the calculation not decompose. The microchanneled asymmetric CGO-LSF membranes show high oxygen permeability and chemical stability under a range of technologically relevant oxygen potential gradients.

Original language	English
Journal	A C S Applied Materials and Interfaces
Volume	8
Issue number	7
Pages (from-to)	4548-4560
Number of pages	13
ISSN	1944-8244
DOIs	https://doi.org/10.1021/acsami.5b10714
Publication status	Published - 2016

Keywords

Phase inversion
Dual-phase composite membranes
Electrical conductivity relaxation
Surface exchange
Mass transfer polarization
Thermodynamic calculation

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10.1021/acsami.5b10714

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Poulsen, H. F. (Project Manager), Gundlach, C. (Project Manager), Dahl, A. B. (Project Participant), Oddershede, J. (Project Participant), Trinderup, C. H. (Project Participant), Simonsen, S. B. (Project Participant), Zheng, Y. (Project Participant), Brink, B. (Project Participant), Lauridsen, T. (Project Participant), Thydén, K. T. S. (Project Participant), Sanna, S. (Project Participant), Baier-Stegmaier, S. M. (Project Participant), Bentzen, J. J. (Project Participant), Christensen, A. N. (Project Participant), Sørensen, H. O. (Project Participant), Mikkelsen, L. P. (Project Participant), Fæster, S. (Project Participant), Johansen, N.F.-J. (PI), Mokso, R. (PI), Kjer, H. M. (PI), Christensen, A. N. (PI), Quagliotti, D. (PI), Zhang, Y. (PI), Rasmussen, P. W. (PI) & Dahl, V. A. (PI)
01/01/2016 → 31/12/2029
Project: Research

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title = "High-Performance Microchanneled Asymmetric Gd0.1Ce0.9O1.95-δ-La0.6Sr0.4FeO3-δ-Based Membranes for Oxygen Separation",

abstract = "A microchanneled asymmetric dual phase composite membrane of 70 vol % Gd0.1Ce0.9O1.95-delta-30 vol % La0.6Sr0.4FeO3-delta (CGO-LSF) was fabricated by a {"}one step{"} phase-inversion tape casting. The sample consists of a thin dense membrane (100 mu m) and a porous substrate including {"}finger-like{"} microchannels. The oxygen permeation flux through the membrane with and without catalytic surface layers was investigated under a variety of oxygen partial pressure gradients. At 900 degrees C, the oxygen permeation flux of the bare membrane was 1.6 (STP) ml cm(-2) min(-1) for the air/He-case and 10.10 (STP) ml cm(-2) min(-1) for the air/CO-case. Oxygen, flux measurements as well as electrical conductivity relaxation show that the oxygen flux through the bare membrane without catalyst is limited by the oxygen surface exchange. The surface exchange can be enhanced by introduction of catalyst on the membrane surface. An increase of the 50 150 oxygen flux of-4.49 (STP) mL cm(-2) min(-1) at 900 degrees C was observed when catalyst is added for the air/He-case. Mass transfer polarization through the finger-like support was confirmed to be negligible, which benefits the overall performance. A stable flux of 7.00 (STP) ml cm(-2) min(-1) was observed between air/CO/CO2 over 200 h at 850 degrees C. Partial surface decomposition was observed on the permeate side exposed to CO, in line with predictions from thermodynamic calculations. In a mixture of CO, CO2, H-2, and H2O at similar oxygen activity the material will according to the calculation not decompose. The microchanneled asymmetric CGO-LSF membranes show high oxygen permeability and chemical stability under a range of technologically relevant oxygen potential gradients.",

keywords = "Phase inversion, Dual-phase composite membranes, Electrical conductivity relaxation, Surface exchange, Mass transfer polarization, Thermodynamic calculation",

author = "Shiyang Cheng and Hua Huang and Simona Ovtar and Simonsen, {S{\o}ren Bredmose} and Ming Chen and Wei Zhang and Martin S{\o}gaard and Andreas Kaiser and Hendriksen, {Peter Vang} and Chusheng Chen",

year = "2016",

doi = "10.1021/acsami.5b10714",

language = "English",

volume = "8",

pages = "4548--4560",

journal = "A C S Applied Materials and Interfaces",

issn = "1944-8244",

publisher = "American Chemical Society",

number = "7",

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TY - JOUR

T1 - High-Performance Microchanneled Asymmetric Gd0.1Ce0.9O1.95-δ-La0.6Sr0.4FeO3-δ-Based Membranes for Oxygen Separation

AU - Cheng, Shiyang

AU - Huang, Hua

AU - Ovtar, Simona

AU - Simonsen, Søren Bredmose

AU - Chen, Ming

AU - Zhang, Wei

AU - Søgaard, Martin

AU - Kaiser, Andreas

AU - Hendriksen, Peter Vang

AU - Chen, Chusheng

PY - 2016

Y1 - 2016

N2 - A microchanneled asymmetric dual phase composite membrane of 70 vol % Gd0.1Ce0.9O1.95-delta-30 vol % La0.6Sr0.4FeO3-delta (CGO-LSF) was fabricated by a "one step" phase-inversion tape casting. The sample consists of a thin dense membrane (100 mu m) and a porous substrate including "finger-like" microchannels. The oxygen permeation flux through the membrane with and without catalytic surface layers was investigated under a variety of oxygen partial pressure gradients. At 900 degrees C, the oxygen permeation flux of the bare membrane was 1.6 (STP) ml cm(-2) min(-1) for the air/He-case and 10.10 (STP) ml cm(-2) min(-1) for the air/CO-case. Oxygen, flux measurements as well as electrical conductivity relaxation show that the oxygen flux through the bare membrane without catalyst is limited by the oxygen surface exchange. The surface exchange can be enhanced by introduction of catalyst on the membrane surface. An increase of the 50 150 oxygen flux of-4.49 (STP) mL cm(-2) min(-1) at 900 degrees C was observed when catalyst is added for the air/He-case. Mass transfer polarization through the finger-like support was confirmed to be negligible, which benefits the overall performance. A stable flux of 7.00 (STP) ml cm(-2) min(-1) was observed between air/CO/CO2 over 200 h at 850 degrees C. Partial surface decomposition was observed on the permeate side exposed to CO, in line with predictions from thermodynamic calculations. In a mixture of CO, CO2, H-2, and H2O at similar oxygen activity the material will according to the calculation not decompose. The microchanneled asymmetric CGO-LSF membranes show high oxygen permeability and chemical stability under a range of technologically relevant oxygen potential gradients.

AB - A microchanneled asymmetric dual phase composite membrane of 70 vol % Gd0.1Ce0.9O1.95-delta-30 vol % La0.6Sr0.4FeO3-delta (CGO-LSF) was fabricated by a "one step" phase-inversion tape casting. The sample consists of a thin dense membrane (100 mu m) and a porous substrate including "finger-like" microchannels. The oxygen permeation flux through the membrane with and without catalytic surface layers was investigated under a variety of oxygen partial pressure gradients. At 900 degrees C, the oxygen permeation flux of the bare membrane was 1.6 (STP) ml cm(-2) min(-1) for the air/He-case and 10.10 (STP) ml cm(-2) min(-1) for the air/CO-case. Oxygen, flux measurements as well as electrical conductivity relaxation show that the oxygen flux through the bare membrane without catalyst is limited by the oxygen surface exchange. The surface exchange can be enhanced by introduction of catalyst on the membrane surface. An increase of the 50 150 oxygen flux of-4.49 (STP) mL cm(-2) min(-1) at 900 degrees C was observed when catalyst is added for the air/He-case. Mass transfer polarization through the finger-like support was confirmed to be negligible, which benefits the overall performance. A stable flux of 7.00 (STP) ml cm(-2) min(-1) was observed between air/CO/CO2 over 200 h at 850 degrees C. Partial surface decomposition was observed on the permeate side exposed to CO, in line with predictions from thermodynamic calculations. In a mixture of CO, CO2, H-2, and H2O at similar oxygen activity the material will according to the calculation not decompose. The microchanneled asymmetric CGO-LSF membranes show high oxygen permeability and chemical stability under a range of technologically relevant oxygen potential gradients.

KW - Phase inversion

KW - Dual-phase composite membranes

KW - Electrical conductivity relaxation

KW - Surface exchange

KW - Mass transfer polarization

KW - Thermodynamic calculation

U2 - 10.1021/acsami.5b10714

DO - 10.1021/acsami.5b10714

M3 - Journal article

C2 - 26829707

SN - 1944-8244

VL - 8

SP - 4548

EP - 4560

JO - A C S Applied Materials and Interfaces

JF - A C S Applied Materials and Interfaces

IS - 7

ER -