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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

Shen, Qiuwan LU ; Li, Shian LU ; Yang, Guogang LU ; Sunden, Bengt LU and Yuan, Jinliang LU (2019) In Energies 12(3).
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... (More)

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.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
CO capture, Crystal structure, Oxygen non-stoichiometry, Oxygen release, Perovskites
in
Energies
volume
12
issue
3
publisher
MDPI AG
external identifiers
  • scopus:85060925247
ISSN
1996-1073
DOI
10.3390/en12030410
language
English
LU publication?
yes
id
fee80b9e-3e6a-4843-b8cf-fba3e6737a68
date added to LUP
2019-02-12 09:36:02
date last changed
2019-03-05 04:32:33
@article{fee80b9e-3e6a-4843-b8cf-fba3e6737a68,
  abstract     = {<p>Oxy-fuel combustion is one of the proposed technologies with the potential to achieve zero CO<sub>2</sub> emission. La<sub>1−x</sub>Ca<sub>x</sub>Co<sub>1−y</sub>Fe<sub>y</sub>O<sub>3−δ</sub> (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 O<sub>2</sub> 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.</p>},
  articleno    = {410},
  author       = {Shen, Qiuwan and Li, Shian and Yang, Guogang and Sunden, Bengt and Yuan, Jinliang},
  issn         = {1996-1073},
  keyword      = {CO capture,Crystal structure,Oxygen non-stoichiometry,Oxygen release,Perovskites},
  language     = {eng},
  month        = {01},
  number       = {3},
  publisher    = {MDPI AG},
  series       = {Energies},
  title        = {Effect of A-/B-site doping on oxygen non-stoichiometry, structure characteristics, and O<sub>2</sub> releasing behavior of La<sub>1−x</sub>Ca<sub>x</sub>Co<sub>1−y</sub>Fe<sub>y</sub>O<sub>3−δ</sub> perovskites},
  url          = {http://dx.doi.org/10.3390/en12030410},
  volume       = {12},
  year         = {2019},
}