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.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Dalian Maritime University
  • Ningbo University
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Energiteknik

Nyckelord

Originalspråkengelska
Artikelnummer410
TidskriftEnergies
Volym12
Utgåva nummer3
StatusPublished - 2019 jan 28
PublikationskategoriForskning
Peer review utfördJa