Effect of A-/B-site doping on oxygen non-stoichiometry, structure characteristics, and O2 releasing behavior of La1−xCaxCo1−yFeyO3−δ perovskites

Research output: Contribution to journalArticle

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.

Details

Authors
Organisations
External organisations
  • Dalian Maritime University
  • Ningbo University
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Energy Engineering

Keywords

  • CO capture, Crystal structure, Oxygen non-stoichiometry, Oxygen release, Perovskites
Original languageEnglish
Article number410
JournalEnergies
Volume12
Issue number3
Publication statusPublished - 2019 Jan 28
Publication categoryResearch
Peer-reviewedYes