Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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The Effect of CBB(CaO·BaO·B2O3) Addition on the Physical Properties and Oxygen Transfer Reactivity of NiO-based Oxygen Carriers for Chemical Looping Combustion

CBB를 첨가한 NiO 산소전달입자의 물성 및 반응 특성

  • 백점인 (한국전력공사 전력연구원) ;
  • 조현근 (한국전력공사 전력연구원) ;
  • 엄태형 (한국전력공사 전력연구원) ;
  • 이중범 (한국전력공사 전력연구원) ;
  • 류호정 (한국에너지기술연구원)
  • Received : 2016.01.19
  • Accepted : 2016.02.28
  • Published : 2016.02.29
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Abstract

Spray-dried NiO-based oxygen carriers developed for chemical looping combustion required high calcination temperatures above $1300^{\circ}C$ to obtain high mechanical strength applicable to circulating fluidized-bed process. In this study, the effect of CBB ($CaO{\cdot}BaO{\cdot}B_2O_3$) addition, as a binder, on the physical properties and oxygen transfer reactivity of spray-dried NiO-based oxygen carriers was investigated. CBB addition resulted in several positive effects such as reduction of calcination temperature and increase in oxygen transfer capacity and porosity. However, oxygen transfer rate was considerably decreased. This was more apparent when a higher amount of CBB was added and MgO was added together. From the experimental results, it is concluded that CBB added NiO-based oxygen carriers are not suitable for chemical looping combustion and a new method to reduce calcination temperature while maintaining high oxygen transfer rate of NiO-based oxygen carriers should be found out.

Keywords

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