Detailed Analysis of Heat and Mass Balance for Supercritical Water Gasification

  • Nakamura Akifumi
    Energia Economic and Technical Research Institute, The Chugoku Electric Power Co., Inc.
  • Kiyonaga Eiji
    Energia Economic and Technical Research Institute, The Chugoku Electric Power Co., Inc.
  • Yamamura Yukimasa
    Energia Economic and Technical Research Institute, The Chugoku Electric Power Co., Inc.
  • Shimizu Yoshihisa
    Energia Economic and Technical Research Institute, The Chugoku Electric Power Co., Inc.
  • Minowa Tomoaki
    Biomass Technology Research Center, National Institute of Advanced Industrial Science and Technology
  • Noda Yoji
    Toyo Koatsu Co., Ltd.
  • Matsumura Yukihiko
    Department of Mechanical System Engineering, Hiroshima University

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The process energy efficiency of supercritical water gasification was determined by a detailed calculation of the energy balance. Ten tons (wet) per day of chicken manure, the moisture content of which was adjusted, was employed as the model feedstock. An efficiency ratio of 70% was obtained for chicken manure having a water content of 80%. The key operating parameters for ensuring high process energy efficiency were the heating value of feedstock and heat recovery efficiency. This result, along with the heat exchanger efficiency measured in the pilot plant, clearly indicates the high potential of supercritical water gasification technology as a wet biomass gasification process.

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