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1996 Fiscal Year Final Research Report Summary

Upgrading of Low Rank Coals and Development of Coal Slurrification Technology.

Research Project

Project/Area Number 07650898
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 化学工学一般
Research InstitutionYamaguchi University

Principal Investigator

USUI Hiromoto  Yamaguchi Univ., Faculty of Eng., Professor, 工学部, 教授 (20107725)

Co-Investigator(Kenkyū-buntansha) SAEKI Takashi  Yamaguchi Univ., Faculty of Eng., Research Associate, 工学部, 助手 (30253165)
Project Period (FY) 1995 – 1996
KeywordsCoal / Slurry / Low Rank Coal / Upgrading / Energy
Research Abstract

The most representative upgrading process of low rank coals is the hot water drying process, which has been extensively investigated in USA,Australia and Japan. The upgrading effect of this process is remarkable, but the cost of upgrading by the hot water drying process is very high. Thus the object of this research was to reduce the cost of upgrading as possible. After several try and error for the different upgrading process, we found that the combined process of vacuum drying and tar coating was the most effective to reduce the cost of upgrading of low rank coals. The usual hot water drying process employs the following temperature and pressure conditions ; T=350゚C and P=150atm. On the other hand, the temperature and pressure conditions of the combined process developed in this study were T=300゚C and P=5atm, respectively. This means that the cost of upgrading was very much reduced. The slurrification of upgraded coals was successfully done. The apparent viscosity of 60 wt% slurry was less than 1 Pa・s, which means that the coal water slurry prepared by this upgrading process can be used as a feed of coal gasification or direct slurry burning process. The process developed in this study is promising as a coal utilizing process. Feasibility study of this process for the commercial plant is needed to confirm the usefullness of this process.

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] 薄井 洋基 他3名: "Pheology of Low Rank Coal Slurry Prepared by Upgrading Process" Proc.of Engineering Foundation Conference on Rheology in Mineral Industry. Feb.16-21 San Diego. TH-3 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 薄井 洋基 他4名: "Sedimentaition Stability and Rheology of Coal Water Mixture" Proc.of Engineering Foundation Conference on Rheology in Mineral Industry. Feb.16-21 San Diego. TH-7 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Usui, T.Tachikawa and T.Saeki: "Rheology of Low Rank Coal Slurries Prepared by Upgrading Process" Proc.of Eng.Foundation Conf.on Rheology in Mineral Industry. Feb.16-21, San Diego. TH-3 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Usui, K.Hayashi, T.Tamura and T.Saeki: "Sedimentation Stability and Rheology of Coal Water Mixtures" Proc.of Eng.Foundation Conf.on Rheology in Mineral Industry. Feb.16-21, San Diego. TH-7 (1997)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-03-09  

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