화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.33, No.11, 3162-3168, November, 2016
DOI10.1007/s11814-016-0192-5  Export Citation
CO2 decomposition using metal ferrites prepared by co-precipitation method
Shen Jiaowen, Dong Woo Kim, Sang Bum Kim1, and Young Min Jo†
  • Department of Environmental Engineering, Kyung Hee University, Yongin-si, Gyeonggi 17104, Korea
  • 1Green Process and Material R&D Group, KITECH, Chungcheongnam-do 31056, Korea
E-mail:
To catalytically decompose the greenhouse gas, CO2, spinel structure M-ferrites (M=Co, Ni, Cu, Zn) were synthesized by chemical co-precipitation using metal salts and sodium hydroxide as starting materials. The crystallite size of the newly-prepared M-ferrites increased and the BET surface area decreased with increasing calcination temperature. A thermal analysis of the reduction and reoxidation of M-ferrites indicated that substitution of divalent transition metals (i.e., Cu, Ni and Co) into Fe3O4 improved the reduction kinetics in the order of Cu>Ni>Co. ZnFe2O4 was the most difficult compound to completely reduce due to its stable structure. Commercial samples of the reduced Fe3O4, CoFe2O4 and ZnFe2O4 showed an increase in mass through the reoxidation process, but it was much more difficult for oxygen atoms to enter the structure of the reduced samples of NiFe2O4 and CuFe2O4. The M-ferrites in a batch type reactor showed better efficiency than the commercial Fe3O4. Also found was that CoFe2O4 showed a high regeneration potential, although it required a higher critical reaction temperature. NiFe2O4 and CuFe2O4 were excellent candidate materials for CO2 decomposition at lower temperatures.
Keywords:Carbon Dioxide;Metal Ferrite;Co-precipitation;Catalytic Reduction
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