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In situ simultaneous synchrotron powder diffraction and mass spectrometry study of methane anaerobic combustion on iron-oxide-based oxygen carrier

In situ simultaneous synchrotron powder diffraction and mass spectrometry study of methane... Reduction of iron oxide/CeO2 solid due to methane anaerobic combustion has been studied using in situ time-resolved synchrotron X-ray powder diffraction and mass spectrometry measurements. All the chemical reactions involved in the process have been mapped. Rietveld profile fitting analysis has given a quantitative estimation of the different phases at every step of the reaction. The reaction temperature has been estimated using thermal expansion of both Fe2O3 and CeO2. From the structural parameters of CeO2 it has been possible to claim that CeO2 participates in the reduction process by transforming into a reduced CeOx form. The number, x, of O atoms per formula unit has been estimated by measuring the percentage variation of the unit-cell parameters. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Applied Crystallography International Union of Crystallography

In situ simultaneous synchrotron powder diffraction and mass spectrometry study of methane anaerobic combustion on iron-oxide-based oxygen carrier

In situ simultaneous synchrotron powder diffraction and mass spectrometry study of methane anaerobic combustion on iron-oxide-based oxygen carrier

Journal of Applied Crystallography , Volume 38 (2): 353 – Mar 11, 2005

Abstract

Reduction of iron oxide/CeO2 solid due to methane anaerobic combustion has been studied using in situ time-resolved synchrotron X-ray powder diffraction and mass spectrometry measurements. All the chemical reactions involved in the process have been mapped. Rietveld profile fitting analysis has given a quantitative estimation of the different phases at every step of the reaction. The reaction temperature has been estimated using thermal expansion of both Fe2O3 and CeO2. From the structural parameters of CeO2 it has been possible to claim that CeO2 participates in the reduction process by transforming into a reduced CeOx form. The number, x, of O atoms per formula unit has been estimated by measuring the percentage variation of the unit-cell parameters.

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References (14)

Publisher
International Union of Crystallography
Copyright
Copyright (c) 2005 International Union of Crystallography
Subject
Rietveld method, synchrotron radiation, ceria, methane combustion, powder diffraction
ISSN
0021-8898
eISSN
1600-5767
DOI
10.1107/S0021889805004784
Publisher site
See Article on Publisher Site

Abstract

Reduction of iron oxide/CeO2 solid due to methane anaerobic combustion has been studied using in situ time-resolved synchrotron X-ray powder diffraction and mass spectrometry measurements. All the chemical reactions involved in the process have been mapped. Rietveld profile fitting analysis has given a quantitative estimation of the different phases at every step of the reaction. The reaction temperature has been estimated using thermal expansion of both Fe2O3 and CeO2. From the structural parameters of CeO2 it has been possible to claim that CeO2 participates in the reduction process by transforming into a reduced CeOx form. The number, x, of O atoms per formula unit has been estimated by measuring the percentage variation of the unit-cell parameters.

Journal

Journal of Applied CrystallographyInternational Union of Crystallography

Published: Mar 11, 2005

Keywords: Rietveld method ; synchrotron radiation ; ceria ; methane combustion ; powder diffraction .

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