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Effect of A-/B-site Doping on Oxygen Non-Stoichiometry, Structure characteristics, and O 2 Releasing Behavior of La 1−x Ca x Co 1−y Fe y O 3−δ Perovskites

Author

Listed:
  • Qiuwan Shen

    (Marine Engineering College, Dalian Maritime University, Dalian 116026, China)

  • Shian Li

    (Marine Engineering College, Dalian Maritime University, Dalian 116026, China)

  • Guogang Yang

    (Marine Engineering College, Dalian Maritime University, Dalian 116026, China)

  • Bengt Sunden

    (Department of Energy Sciences, Lund University, 22100 Lund, Sweden)

  • Jinliang Yuan

    (Faculty of Maritime and Transportation, Ningbo University, Ningbo 315211, China)

Abstract

Oxy-fuel combustion is one of the proposed technologies with the potential to achieve zero CO 2 emission. La 1−x Ca x Co 1−y Fe y O 3−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 O 2 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.

Suggested Citation

  • Qiuwan Shen & Shian Li & Guogang Yang & Bengt Sunden & Jinliang Yuan, 2019. "Effect of A-/B-site Doping on Oxygen Non-Stoichiometry, Structure characteristics, and O 2 Releasing Behavior of La 1−x Ca x Co 1−y Fe y O 3−δ Perovskites," Energies, MDPI, vol. 12(3), pages 1-11, January.
  • Handle: RePEc:gam:jeners:v:12:y:2019:i:3:p:410-:d:201415
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    References listed on IDEAS

    as
    1. Qiuwan Shen & Yindi Zhang & Haoran Ding & Lijuan Wu & Yongqing Xu & Baocheng Shi & Ying Zheng & Jinliang Yuan, 2017. "Performance and Stability Enhancement of Perovskite-Type Nanomaterials Applied for Carbon Capture Utilizing Oxyfuel Combustion," Energies, MDPI, vol. 10(2), pages 1-11, February.
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