Articles
  • Effects of various catalytic promoters on the fast redox reaction of MgFe2O4 oxygen carrier materials for chemical looping combustion

  • Jae-Woo Parka and Ki-Tae Leea,b,c,d,*

  • aDivision of Advanced Materials Engineering, Jeonbuk National University, Jeonbuk 54896, Republic of Korea
    bHydrogen and Fuel Cell Research Center, Jeonbuk National University, Jeonbuk 54896, Republic of Korea
    cDepartment of Energy Storage/Conversion Engineering of Graduate School (BK21 FOUR), Jeonbuk National University, Jeonbuk 54896, Republic of Korea
    dDepartment of JBNU-KIST Industry-Academia Convergence Research, Jeonbuk National University, Jeonbuk 54896, Republic of Korea

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This study focuses on improving the oxygen transfer properties of a MgFe₂O₄ oxygen carrier in chemical looping combustion by introducing the catalytic promoters gadolinium-doped ceria, palladium, and platinum. MgFe₂O₄ synthesized by solid-state reactions exhibited reversible redox behavior but suffered from agglomeration and a slow reaction rate. The introduction of palladium and platinum significantly enhanced the oxygen transfer rate in the oxidation and reduction reactions, and the palladium-incorporated composite achieved an oxygen-transfer capacity of 23.40 wt.%, which was similar to that of pure MgFe₂O₄ (23.96 wt.%). This improvement can be explained by the participation of PdO as an additional oxygen source. Gadolinium-doped ceria provided microstructural stability and suppressed agglomeration, but the oxygen-transfer rate and capacity were lower due to its oxygen storage property. The palladium-incorporated composite maintained its microstructure after redox cycling, showing excellent redox stability and oxygen transfer properties. These results demonstrate that catalytic promoters such as palladium and platinum not only accelerate the reaction rate, but also improve long-term structural stability, providing important insights into optimizing oxygen carrier materials in chemical looping combustion.


Keywords: Chemical looping combustion, Oxygen carrier material, Redox reaction, Oxygen transfer capacity, Oxygen transfer rate.

This Article

  • 2025; 26(1): 102-108

    Published on Feb 28, 2025

  • 10.36410/jcpr.2025.26.1.102
  • Received on Oct 15, 2024
  • Revised on Nov 26, 2024
  • Accepted on Jan 10, 2025

Correspondence to

  • Ki-Tae Lee

  • aDivision of Advanced Materials Engineering, Jeonbuk National University, Jeonbuk 54896, Republic of Korea
    bHydrogen and Fuel Cell Research Center, Jeonbuk National University, Jeonbuk 54896, Republic of Korea
    cDepartment of Energy Storage/Conversion Engineering of Graduate School (BK21 FOUR), Jeonbuk National University, Jeonbuk 54896, Republic of Korea
    dDepartment of JBNU-KIST Industry-Academia Convergence Research, Jeonbuk National University, Jeonbuk 54896, Republic of Korea
    Tel : +82-63-270-2290 Fax: +82-63-270-2386

  • E-mail: ktlee71@jbnu.ac.kr