Separations: Materials, Devices, and Processes

Oxygen permeation of various archetypes of oxygen membranes based on BSCF

  1. Matthias Schulz*,
  2. Ute Pippardt,
  3. Lutz Kiesel,
  4. Katrin Ritter,
  5. Ralf Kriegel

Article first published online: 31 MAY 2012

DOI: 10.1002/aic.13843

Issue

AIChE Journal

AIChE Journal

Volume 58, Issue 10, pages 3195–3202, October 2012

Additional Information

How to Cite

Schulz, M., Pippardt, U., Kiesel, L., Ritter, K. and Kriegel, R. (2012), Oxygen permeation of various archetypes of oxygen membranes based on BSCF. AIChE J., 58: 3195–3202. doi: 10.1002/aic.13843

Author Information

  1. Dept. of Environmental Engineering and Bioenergy, Fraunhofer Institute for Ceramic Technologies and Systems, Michael Faraday Straße 1, Hermsdorf 07629, Germany

*Dept. of Environmental Engineering and Bioenergy, Fraunhofer Institute for Ceramic Technologies and Systems, Michael Faraday Straße 1, Hermsdorf 07629, Germany

Publication History

  1. Issue published online: 10 SEP 2012
  2. Article first published online: 31 MAY 2012
  3. Accepted manuscript online: 14 MAY 2012 10:51AM EST
  4. Manuscript Revised: 24 APR 2012
  5. Manuscript Received: 7 MAR 2012

Funded by

  • Helmholtz Association of German Research Centres (Initiative and Networking Fund)
  • Helmholtz Alliance MEM-BRAIN. Grant Number: HA-104
  • Federal Ministry of Economy and Infrastructure. Grant Number: MF090096

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Keywords:

  • oxygen membrane;
  • mixed conductor;
  • capillaries;
  • asymmetric membrane

Abstract

Ba0.5Sr0.5Co0.8Fe0.2O3-δ tubes, capillaries, capillary modules, and asymmetric membranes were prepared and tested for oxygen permeation in a dead-end vacuum operation mode at temperatures up to 850°C. The capillary module was built up by reactive air brazing using seven capillaries and a supply tube. Two machined discs were used as an end cap and as a connector plate. The oxygen permeation behaves according to Wagner at small driving forces, but significant negative deviations were observed for asymmetric membranes and single capillaries at higher ones. This is caused by pressure drops at the vacuum side for single capillaries. The highest oxygen flux was revealed for the capillary module with 175.5 mL(STP)/min at a low-vacuum pressure of 0.042 bar at 850°C, but the asymmetric membrane showing a little bit higher flux at moderate vacuum pressures above 0.07 bar. © 2012 American Institute of Chemical Engineers AIChE J, 58: 3195–3202, 2012

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