High-flux CO2-stable oxygen transport hollow fiber membranes through surface engineering

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Autoren

  • F. Buck
  • O. Bunjaku
  • J. Caro
  • T. Schiestel

Externe Organisationen

  • Fraunhofer-Institut für Grenzflächen- und Bioverfahrenstechnik (IGB)
Forschungs-netzwerk anzeigen

Details

OriginalspracheEnglisch
Seiten (von - bis)1537-1547
Seitenumfang11
FachzeitschriftJournal of the European Ceramic Society
Jahrgang42
Ausgabenummer4
Frühes Online-Datum23 Nov. 2021
PublikationsstatusVeröffentlicht - 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.

ASJC Scopus Sachgebiete

Zitieren

High-flux CO2-stable oxygen transport hollow fiber membranes through surface engineering. / Buck, F.; Bunjaku, O.; Caro, J. et al.
in: Journal of the European Ceramic Society, Jahrgang 42, Nr. 4, 04.2022, S. 1537-1547.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Buck F, Bunjaku O, Caro J, Schiestel T. High-flux CO2-stable oxygen transport hollow fiber membranes through surface engineering. Journal of the European Ceramic Society. 2022 Apr;42(4):1537-1547. Epub 2021 Nov 23. doi: 10.1016/j.jeurceramsoc.2021.11.040
Buck, F. ; Bunjaku, O. ; Caro, J. et al. / High-flux CO2-stable oxygen transport hollow fiber membranes through surface engineering. in: Journal of the European Ceramic Society. 2022 ; Jahrgang 42, Nr. 4. S. 1537-1547.
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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”.

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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.

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