Issue 19, 2005
From the journal:

Journal of Materials Chemistry

La0.8Sr0.2Co0.2Fe0.8O3−δ as a potential oxygen carrier in a chemical looping type reactor, an in-situ powder X-ray diffraction study

Jennifer E. Readman,a   Anja Olafsen,a   Yngve Larringa  and  Richard Blom*a  

* Corresponding authors

a SINTEF Materials and Chemistry, P. B. 124, Blindern, Oslo, Norway
E-mail: richard.blom@sintef.no
Fax: +47 22067350
Tel: +47 90622647

Abstract

Perovskite type materials which can change oxygen content quickly under changing oxygen partial pressures are believed to be suitable materials for chemical looping of natural gas. In order to investigate the oxidation/reduction of these materials in-situ powder X-ray diffraction was used to study the La1−xSrxCo1−yFeyO3−δ system. It was found that for samples with high iron content a hexagonal/orthorhombic to cubic phase transition was observed upon heating in a reductive atmosphere and that the cationic lattice is maintained upon reduction. On the other hand, the samples with high cobalt content were unstable with respect to heating in a reductive atmosphere as they decomposed to form La2O3, Co and at least one additional phase. Once a suitable candidate had been obtained a chemical looping experiment was carried out using H2 as a model fuel, again using in-situ powder X-ray diffraction.

Graphical abstract: La0.8Sr0.2Co0.2Fe0.8O3−δ as a potential oxygen carrier in a chemical looping type reactor, an in-situ powder X-ray diffraction study

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Article information

DOI
https://doi.org/10.1039/B416526H
Article type
Paper
Submitted
27 Oct 2004
Accepted
14 Mar 2005
First published
29 Mar 2005

J. Mater. Chem., 2005,15, 1931-1937

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La0.8Sr0.2Co0.2Fe0.8O3−δ as a potential oxygen carrier in a chemical looping type reactor, an in-situ powder X-ray diffraction study

J. E. Readman, A. Olafsen, Y. Larring and R. Blom, J. Mater. Chem., 2005, 15, 1931 DOI: 10.1039/B416526H

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