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Effect of A-/B-site Doping on Oxygen Non-Stoichiometry, Structure characteristics, and O2 Releasing Behavior of La1−xCaxCo1−yFeyO3−δ Perovskites

descriptionPublicationkeyboard_double_arrow_right Article , Journal , Other literature type 28 Jan 2019Publisher:MDPI AGJournal:Energies, volume 12, page 410 (eissn: 1996-1073,

Authors: Qiuwan Shen; Shian Li; Guogang Yang; Bengt Sunden; Jinliang Yuan;

doi: 10.3390/en12030410

Effect of A-/B-site Doping on Oxygen Non-Stoichiometry, Structure characteristics, and O2 Releasing Behavior of La1−xCaxCo1−yFeyO3−δ Perovskites

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Abstract

Oxy-fuel combustion is one of the proposed technologies with the potential to achieve zero CO2 emission. La1−xCaxCo1−yFeyO3−δ (LCCF) perovskites are promising materials with high selectively for oxygen. In this study, the oxygen non-stoichiometry of perovskites LCCF was investigated by means of iodometric titration. LCCF was prepared using the liquid citrate method, and the phase structures were identified by X-ray diffraction. Fixed-bed experiments were performed to study the oxygen desorption performance of LCCF. The oxygen deficiency of LCCF increased with increasing Ca molar content of A site, but the value of δ of LCCF with increasing Fe molar content in B site is nearly constant. Experimental observation demonstrated that the O2 release amount of LCCF does not depend on oxygen non-stoichiometry δ generated from A-site doping. At the same time, doping Fe in B site has an obvious impact on the oxygen desorption amount.

Related Organizations

Ningbo University
China (People's Republic of)
Dalian Maritime University
China (People's Republic of)
Ningbo University
China (People's Republic of)
Lund University
Sweden
Dalian Maritime University
China (People's Republic of)

Keywords

CO<sub>2</sub> capture, crystal structure, Technology, T, perovskites, oxygen release, oxygen non-stoichiometry

5on3

6co1

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