Distinctive effects of CaO additive on atmospheric gasification of biomass at different temperatures

  • Xu G
  • Murakami T
  • Suda T
 et al. 
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Calcium oxide has long been recognized as an effective in-bed catalyst for reforming or cracking tars generated in thermally decomposing hydrocarbon fuels such as biomass. Under pressures as high as 20 atm, the oxide was also widely tested as a good CO2 acceptor to capture CO2 on-site to produce high-caloric pipeline gas from gasifying coal and coalcoke. By using CaO as an additive of the fuel and bed material, the research detailed in this research note demonstrated that CaO could also be a substantially good CO2 acceptor for the atmospheric gasification of biomass, provided the reaction temperature is appropriately low, such as not much over 973 K. At temperatures >1073 K, the additive exhibited basically the catalytic effect only, which led the H2 content of the product gas to increase and the tar release with the gas to decrease.

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  • Takahiro Murakami

  • Toshiyuki Suda

  • Shigeru Kusama

  • Toshiro Fujimori

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