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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

BAEK, JEOM-IN;JO, HYUNGEUN;EOM, TAEHYOUNG;LEE, JOONGBEOM;RYU, HO-JUNG
백점인;조현근;엄태형;이중범;류호정

  • Received : 2016.01.19
  • Accepted : 2016.02.28
  • Published : 2016.02.29

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

CLC;Oxygen carrier;CBB;Nickel oxide;Spray drying

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Cited by

  1. Conceptual Design and Feasibility Study on 0.5 MWth Pressurized Chemical Looping Combustor vol.27, pp.2, 2016, https://doi.org/10.7316/KHNES.2016.27.2.201

Acknowledgement

Supported by : 한국에너지기술평가원(KETEP)