Exploring the Processing of Tubular Chromite- and Zirconia-Based Oxygen Transport Membranes

Astri Bjørnetun Haugen*, Lev Martinez Aguilera, Kawai Kwok, Tesfaye Molla, Kjeld Bøhm Andersen, Stéven Pirou, Andreas Kaiser, Peter Vang Hendriksen, Ragnar Kiebach

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

387 Downloads (Pure)


Tubular oxygen transport membranes (OTMs) that can be directly integrated in high temperature processes have a large potential to reduce CO2 emissions. However, the challenging processing of these multilayered tubes, combined with strict material stability requirements, has so far hindered such a direct integration. We have investigated if a porous support based on (Y2O3)0.03(ZrO2)0.97 (3YSZ) with a dense composite oxygen membrane consisting of (Y2O3)0.01(Sc2O3)0.10(ZrO2)0.89 (10Sc1YSZ) as an ionic conductor and LaCr0.85Cu0.10Ni0.05O3−δ (LCCN) as an electronic conductor could be fabricated as a tubular component, since these materials would provide outstanding chemical and mechanical stability. Tubular components were made by extrusion, dip coating, and co-sintering, and their chemical and mechanical integrity was evaluated. Sufficient gas permeability (≥10−14 m2) and mechanical strength (≥50 MPa) were achieved with extruded 3YSZ porous support tubes. The high co-sintering temperature required to densify the 10ScYSZ/LCCN membrane on the porous support, however, causes challenges related to the evaporation of chromium from the membrane. This chemical degradation caused loss of the LCCN electronic conducting phase and the formation of secondary lanthanum zirconate compounds and fractures. LCCN is therefore not suitable as the electronic conductor in a tubular OTM, unless means to lower the sintering temperature and reduce the chromium evaporation are found that are applicable to the large-scale fabrication of tubular components.
Original languageEnglish
Issue number2
Pages (from-to) 229-245
Publication statusPublished - 2018

Bibliographical note

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).


  • Oxygen transport membranes
  • Yttria-stabilized zirconia
  • Extrusion
  • Thermoplastic
  • LaCrO3
  • Dip coating
  • Co-sintering
  • Tubular membranes
  • Porosity


Dive into the research topics of 'Exploring the Processing of Tubular Chromite- and Zirconia-Based Oxygen Transport Membranes'. Together they form a unique fingerprint.

Cite this