Journal of the Japan Institute of Energy
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ONLINE ISSN: 1882-6121
PRINT ISSN: 0916-8753

Journal of the Japan Institute of Energy Vol. 76 (1997), No. 10

  • Function of Hydrogenated Solvent in the Coal Liquefaction System

    pp. 971-979

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    DOI:10.3775/jie.76.971

    The influence of heavy distillate in the solvent for coal liquefaction was investigated with a 5L batch-autoclave.
    The following conclusions are obtained.
    (1) Heavy distillate in the solvent consumes much hydrogen and prevents hydrogen translation on asphaltene hydrogenating reaction. Consequently, it reduces oil yield in the coal liquefaction system.
    (2) Donatable hydrogen in the heavy solvent equally promotes coal liquefaction reaction to that in the recycle solvent. Severe hydrotreatment of the heavy solvent increases its hydrogen donatability and oil yield in the coal liquefaction system.
  • RDF Combustion Characteristics in Fluidized Bed

    pp. 980-987

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    DOI:10.3775/jie.76.980

    Volatile and Char combustion characteristics of refused derived fuel (RDF) in fluidized bed were discussed. The influence of the bed temperature and inlet O2 concentration on the time for a volatile combustion of RDF were quantitatively analyzed by shrinking core pseudo-steadily heat transfer controlled model. This model is close to the original data of the time for volatile combustion of RDF. Shrinking process of unreacted core in RDF during volatile combustion was directly observed to examine its validity for this model. The time for char combustion of RDF in fluidized bed decreased with increasing bed temperature and inlet O2 concentration, and was explained by the assumption of the gas film diffusion control model.

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