Details
| Original language | English |
|---|---|
| Pages (from-to) | 1537-1547 |
| Number of pages | 11 |
| Journal | Journal of the European Ceramic Society |
| Volume | 42 |
| Issue number | 4 |
| Early online date | 23 Nov 2021 |
| Publication status | Published - Apr 2022 |
Abstract
The influences of bulk diffusion and surface exchange on oxygen transport of (La0.6Ca0.4)(Co0.8Fe0.2)O3-δ (LCCF) hollow fiber membranes were investigated. As an outcome, two strategies for increasing the oxygen permeation were pursued. First, porous LCCF hollow fibers as support were coated with a 22 μm dense LCCF separation layer through dip coating and co-sintering. The oxygen permeation of the porous fiber with dense layer reached up to 5.10 mL min−1 cm-2 at 1000 °C in a 50 % CO2 atmosphere. Second, surface etching of dense LCCF hollow fibers with H2SO4 was applied. The surface etching of both inner and outer surfaces leads to a permeation improvement up to 86.0 %. This finding implies that the surface exchange reaction plays a key role in oxygen transport through LCCF hollow fibers. A good long-term (>250 h) stability of the asymmetric hollow fiber in a 50 % CO2 atmosphere was found at 900 °C.
Keywords
- Asymmetric hollow fiber membrane, Mixed ionic electronic conductor, Oxygen separation, Surface modification
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
- Materials Science(all)
- Materials Chemistry
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In: Journal of the European Ceramic Society, Vol. 42, No. 4, 04.2022, p. 1537-1547.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - High-flux CO2-stable oxygen transport hollow fiber membranes through surface engineering
AU - Buck, F.
AU - Bunjaku, O.
AU - Caro, J.
AU - Schiestel, T.
N1 - Funding Information: This work is part of the project “Plasma-induced CO 2 -conversion” (PiCK, project number: 03SFK2S3) and of the project “Next Generation Plasma Conversion” (NexPlas, project number: 03SF0618C) and financially supported by the German Federal Ministry of Education and Research in the framework of the “Kopernikus projects for the Energiewende”.
PY - 2022/4
Y1 - 2022/4
N2 - The influences of bulk diffusion and surface exchange on oxygen transport of (La0.6Ca0.4)(Co0.8Fe0.2)O3-δ (LCCF) hollow fiber membranes were investigated. As an outcome, two strategies for increasing the oxygen permeation were pursued. First, porous LCCF hollow fibers as support were coated with a 22 μm dense LCCF separation layer through dip coating and co-sintering. The oxygen permeation of the porous fiber with dense layer reached up to 5.10 mL min−1 cm-2 at 1000 °C in a 50 % CO2 atmosphere. Second, surface etching of dense LCCF hollow fibers with H2SO4 was applied. The surface etching of both inner and outer surfaces leads to a permeation improvement up to 86.0 %. This finding implies that the surface exchange reaction plays a key role in oxygen transport through LCCF hollow fibers. A good long-term (>250 h) stability of the asymmetric hollow fiber in a 50 % CO2 atmosphere was found at 900 °C.
AB - The influences of bulk diffusion and surface exchange on oxygen transport of (La0.6Ca0.4)(Co0.8Fe0.2)O3-δ (LCCF) hollow fiber membranes were investigated. As an outcome, two strategies for increasing the oxygen permeation were pursued. First, porous LCCF hollow fibers as support were coated with a 22 μm dense LCCF separation layer through dip coating and co-sintering. The oxygen permeation of the porous fiber with dense layer reached up to 5.10 mL min−1 cm-2 at 1000 °C in a 50 % CO2 atmosphere. Second, surface etching of dense LCCF hollow fibers with H2SO4 was applied. The surface etching of both inner and outer surfaces leads to a permeation improvement up to 86.0 %. This finding implies that the surface exchange reaction plays a key role in oxygen transport through LCCF hollow fibers. A good long-term (>250 h) stability of the asymmetric hollow fiber in a 50 % CO2 atmosphere was found at 900 °C.
KW - Asymmetric hollow fiber membrane
KW - Mixed ionic electronic conductor
KW - Oxygen separation
KW - Surface modification
UR - http://www.scopus.com/inward/record.url?scp=85120057110&partnerID=8YFLogxK
U2 - 10.1016/j.jeurceramsoc.2021.11.040
DO - 10.1016/j.jeurceramsoc.2021.11.040
M3 - Article
AN - SCOPUS:85120057110
VL - 42
SP - 1537
EP - 1547
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
SN - 0955-2219
IS - 4
ER -