Detail publikace

Tubular La0.7Ca0.3Fe0.85Co0.15O3-d Perovskite Membranes, Part II: Performance and Stability

TRUNEC, M. CIHLÁŘ, J. DIETHELM, S. VAN HERLE, J.

Originální název

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

Oxygen permeability through the tubular La0.7Ca0.3Fe0.85Co0.15O3-d perovskite membrane prepared by thermoplastic extrusion was measured in the temperature range from 800 to 1040 degC in air/argon gradient and compared with oxygen permeability of planar membranes prepared by injection molding and cold isostatic pressing. Oxygen flux through the perovskite membranes was controlled by bulk diffusion of oxygen and was not limited by surface exchange reactions. The oxygen flux through perovskite membranes normalized to 1 mm wall thickness at 900 degC was 0.064 micromol cm-2 s-1. The activation energy of oxygen diffusion was 128 kJ mol-1. The tubular membrane was tested in a reactor for partial oxidation of methane for more than 1900 hours. The oxygen flux decreased gradually during the test from 1.5 to 1 micromol cm-2 s-1. The methane conversion could be adjusted to 83-88%, with the CO selectivity in the same range. After the test a degradation of the perovskite structure of the membrane was observed. A possible mechanism for the phase degradation and segregation was proposed.

Klíčová slova

perovskite, membrane, structure, degradation

Autoři

TRUNEC, M.; CIHLÁŘ, J.; DIETHELM, S.; VAN HERLE, J.

Rok RIV

2006

Vydáno

1. 1. 2006

Nakladatel

The American Ceramic Society

ISSN

0002-7820

Periodikum

Journal of the American Ceramic Society

Ročník

Číslo

Stát

Spojené státy americké

Strany od

955

Strany do

959

Strany počet

BibTex

@article{BUT42882,
  author="Martin {Trunec} and Jaroslav {Cihlář} and Stefan {Diethelm} and Jan {Van herle}",
  title="Tubular La0.7Ca0.3Fe0.85Co0.15O3-d Perovskite Membranes, Part II: Performance and Stability",
  journal="Journal of the American Ceramic Society",
  year="2006",
  volume="89",
  number="3",
  pages="955--959",
  issn="0002-7820"
}