Permeation improvement of LCCF hollow fiber membranes by spinning and sintering optimization

Frederic Buck; Armin Feldhoff; Jürgen Caro; Thomas Schiestel

doi:10.1016/j.seppur.2020.118023

Permeation improvement of LCCF hollow fiber membranes by spinning and sintering optimization

Frederic Buck
, Armin Feldhoff
, Jürgen Caro
, Thomas Schiestel^*

^*Corresponding author for this work

Institute of Physical Chemistry and Electrochemistry

Fraunhofer Institute for Interfacial Engineering and Biotechnology (IGB)

Research output: Contribution to journal › Article › Research › peer review

Abstract

The effects of grain size and wall thickness on the oxygen transport mechanism of (La_0.6Ca_0.4)(Co_0.8Fe_0.2)O_3-δ hollow fiber membranes were investigated. For this purpose, hollow fiber membranes of different geometry were prepared with different spinnerets via phase inversion spinning and subsequently sintered at different temperatures. The influence of the manufacturing conditions on the LCCF microstructure were analysed by SEM, XRD and TEM. With increasing sintering temperature, the grain size increased from 0.4 µm² at 1070 °C to 19.5 µm² at 1245 °C. With bigger grain sizes and lower wall thickness, the oxygen flux shows an increase up to 6.2 ml min⁻¹ cm⁻² (at 1000 °C) in a 50% CO₂ atmosphere. This finding implies that the grain boundaries act as oxygen diffusion barriers.

Original language	English
Article number	118023
Journal	Separation and Purification Technology
Volume	259
E-pub ahead of print	12 Nov 2020
DOIs	https://doi.org/10.1016/j.seppur.2020.118023
Publication status	Published - 15 Mar 2021

Keywords

Ceramic hollow fiber membrane
CO resistance
Mixed ionic electronic conductor
Oxygen separation
Oxygen transport

ASJC Scopus subject areas

Analytical Chemistry
Filtration and Separation

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10.1016/j.seppur.2020.118023

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@article{c3c1e65d8cd74250a0fbabeec7facd13,

title = "Permeation improvement of LCCF hollow fiber membranes by spinning and sintering optimization",

abstract = "The effects of grain size and wall thickness on the oxygen transport mechanism of (La0.6Ca0.4)(Co0.8Fe0.2)O3-δ hollow fiber membranes were investigated. For this purpose, hollow fiber membranes of different geometry were prepared with different spinnerets via phase inversion spinning and subsequently sintered at different temperatures. The influence of the manufacturing conditions on the LCCF microstructure were analysed by SEM, XRD and TEM. With increasing sintering temperature, the grain size increased from 0.4 µm2 at 1070 °C to 19.5 µm2 at 1245 °C. With bigger grain sizes and lower wall thickness, the oxygen flux shows an increase up to 6.2 ml min−1 cm−2 (at 1000 °C) in a 50\% CO2 atmosphere. This finding implies that the grain boundaries act as oxygen diffusion barriers.",

keywords = "Ceramic hollow fiber membrane, CO resistance, Mixed ionic electronic conductor, Oxygen separation, Oxygen transport",

author = "Frederic Buck and Armin Feldhoff and J{\"u}rgen Caro and Thomas Schiestel",

note = "Funding Information: This work is part of the project “Plasma-induced CO 2 -conversion” (PiCK, project number: 03SFK2S3) and financially supported by the German Federal Ministry of Education and Research in the framework of the “Kopernikus projects for the Energiewende”.",

year = "2021",

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day = "15",

doi = "10.1016/j.seppur.2020.118023",

language = "English",

volume = "259",

journal = "Separation and Purification Technology",

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T1 - Permeation improvement of LCCF hollow fiber membranes by spinning and sintering optimization

AU - Buck, Frederic

AU - Feldhoff, Armin

AU - Caro, Jürgen

AU - Schiestel, Thomas

N1 - Funding Information: This work is part of the project “Plasma-induced CO 2 -conversion” (PiCK, project number: 03SFK2S3) and financially supported by the German Federal Ministry of Education and Research in the framework of the “Kopernikus projects for the Energiewende”.

PY - 2021/3/15

Y1 - 2021/3/15

N2 - The effects of grain size and wall thickness on the oxygen transport mechanism of (La0.6Ca0.4)(Co0.8Fe0.2)O3-δ hollow fiber membranes were investigated. For this purpose, hollow fiber membranes of different geometry were prepared with different spinnerets via phase inversion spinning and subsequently sintered at different temperatures. The influence of the manufacturing conditions on the LCCF microstructure were analysed by SEM, XRD and TEM. With increasing sintering temperature, the grain size increased from 0.4 µm2 at 1070 °C to 19.5 µm2 at 1245 °C. With bigger grain sizes and lower wall thickness, the oxygen flux shows an increase up to 6.2 ml min−1 cm−2 (at 1000 °C) in a 50% CO2 atmosphere. This finding implies that the grain boundaries act as oxygen diffusion barriers.

AB - The effects of grain size and wall thickness on the oxygen transport mechanism of (La0.6Ca0.4)(Co0.8Fe0.2)O3-δ hollow fiber membranes were investigated. For this purpose, hollow fiber membranes of different geometry were prepared with different spinnerets via phase inversion spinning and subsequently sintered at different temperatures. The influence of the manufacturing conditions on the LCCF microstructure were analysed by SEM, XRD and TEM. With increasing sintering temperature, the grain size increased from 0.4 µm2 at 1070 °C to 19.5 µm2 at 1245 °C. With bigger grain sizes and lower wall thickness, the oxygen flux shows an increase up to 6.2 ml min−1 cm−2 (at 1000 °C) in a 50% CO2 atmosphere. This finding implies that the grain boundaries act as oxygen diffusion barriers.

KW - Ceramic hollow fiber membrane

KW - CO resistance

KW - Mixed ionic electronic conductor

KW - Oxygen separation

KW - Oxygen transport

UR - https://www.scopus.com/pages/publications/85097741253

U2 - 10.1016/j.seppur.2020.118023

DO - 10.1016/j.seppur.2020.118023

M3 - Article

AN - SCOPUS:85097741253

SN - 1383-5866

VL - 259

JO - Separation and Purification Technology

JF - Separation and Purification Technology

M1 - 118023

ER -

Permeation improvement of LCCF hollow fiber membranes by spinning and sintering optimization

Abstract

Keywords

ASJC Scopus subject areas

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