CO2 Decomposition Characteristics of Zn-ferrite Powder Prepared by Hydrothermal and Solid State Reaction

수열합성법과 고상법을 이용해 제조된 Zn-ferrite 분말의 이산화탄소 분해 특성

  • Nam, Sung Chan (Greenhouse Gas Research Center, Korea Institute of Energy Research) ;
  • Park, Sung Youl (Greenhouse Gas Research Center, Korea Institute of Energy Research) ;
  • Yoon, Yeo Il (Greenhouse Gas Research Center, Korea Institute of Energy Research) ;
  • Jeong, Soon Kwan (Greenhouse Gas Research Center, Korea Institute of Energy Research)
  • 남성찬 (한국에너지기술연구원 온실가스센터) ;
  • 박성열 (한국에너지기술연구원 온실가스센터) ;
  • 윤여일 (한국에너지기술연구원 온실가스센터) ;
  • 정순관 (한국에너지기술연구원 온실가스센터)
  • Received : 2011.08.16
  • Accepted : 2011.09.21
  • Published : 2011.10.10

Abstract

The objective of this study is the development of carbon recycle technology which converts $CO_2$ captured from flue gas to CO or carbon and reuse in industrial fields. Since $CO_2$ is very stable and difficult to decompose, metal oxide was used as an activation agent for the decomposition of $CO_2$ at low temperature. Metal oxides which convert $CO_2$ to CO or carbon at $500^{\circ}C$ were prepared using Zn-ferrite by the solid state reaction and hydrothermal synthesis. The behaviors of $CO_2$ decomposition were studied using temperature programmed reduction/oxidation (TPR/TPO) and thermogravimetric analyzer (TGA). Zn-ferrite containing 5 wt% ZnO showed the largest reduction and oxidation. Reduction by $H_2$ was 26.53 wt%, oxidation by $CO_2$ was 25.73 wt% and 96.98% of adsorbed $CO_2$ was decomposed to $CO_2$ and carbon with excellent oxidation-reduction behaviors.

Keywords

carbon dioxide;decomposition;reduction;ferrite;zinc

Acknowledgement

Supported by : 지식경제부

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