화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.76, 355-365, August, 2019
DOI10.1016/j.jiec.2019.03.060  Export Citation
Improvement of oxygen transfer capacity by migration of oxygen defects formed in CuxMg1?xFeyTi2?yOz particles
Namgyu Son, Jeong Yeon Do†, No-Kuk Park1, Si Ok Ryu1, Ui Sik Kim2, Jeom-In Baek2, Doyeon Lee3, Ho-Jung Ryu3, and Misook Kang†
  • Department of Chemistry, College of Natural Sciences, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Republic of Korea
  • 1School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Republic of Korea
  • 2Korea Electric Power Corporation Research Institute, 105 Munji-ro, Yuseong-gu, Daejeon 34056, Republic of Korea
  • 3Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea
E-mail:,
This study focuses on the improvement of oxygen transfer capacity of CuxMg1-xFeyTi2-yOz particle which simultaneously inserted with Cu2+ and Fe3+ ions into the Mg1.0Ti2.0O5.0 Karroite. The prepared Cu0.5Mg0.5Fe1.0Ti1.0O4.5 particle was composed of a co-mixture of a cubic Mg2TiO4 inverse spinel and an orthorhombic Fe2TiO5 Karroite. The CH4 and CO gases were selectively adsorbed on the surfaces of Cu and Fe ions, respectively, suggested that during the CLC, the Cu2+ and Fe3+ components had more effect to the methane combustion reaction and carbon monoxide oxidation. The oxygen transfer capacities of the Cu0.5Mg0.5Fe1.0Ti1.0O4.5 in the H2/air and CH4-CO2/air redox systems exhibited 9.59 % and 6.37 %, respectively. The difference of 3.22% in two systems corresponded to the affection of Fe2+. This work eventually revealed that when the Cu2+ and Fe3+ ions were simultaneously inserted for the Mg1.0Ti2.0O5.0 Karroite, their coexistence can improve the oxygen carrier capacity by a rapid oxygen migration through oxygen vacancies formed in lattice.
Keywords:CuxMg1-xFeyTi2-yOz;Oxygen migration;Oxygen transfer capacity;Oxygen vacancy
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