Fluidized Bed Medium Separation (FBMS) using the particles with different hydrophilic and hydrophobic properties

Mikio Yoshida, Jun Oshitani, Keiichiro Tani, Kuniaki Gotoh

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Three kinds of particles with different hydrophilic and hydrophobic properties were used as fluidized particles of Fluidized Bed Medium Separation (FBMS). A minimum fluidization velocity, an apparent specific gravity of fluidized bed and floating-sinking behaviors of dry and wet coals were measured in the range of relative humidity from 50% to 80%. In a hydrophilic particle, the fluidization became unstable with increasing relative humidity because particle aggregation took place at a high humidity, and hence floating-sinking behaviors depend on changes in a relative humidity. On the other hand, in a highly hydrophobic particle, the fluidization was stable and floating-sinking behaviors based on the specific gravity difference were obtained even for wet coals and at a high relative humidity. Therefore, the FBMS using a highly hydrophobic particle is applicable at a high relative humidity without a control device of relative humidity.

Original languageEnglish
Pages (from-to)108-114
Number of pages7
JournalAdvanced Powder Technology
Volume22
Issue number1
DOIs
Publication statusPublished - Jan 1 2011

Keywords

  • Fluidized bed
  • Gravity separation
  • Hydrophobic particles
  • Relative humidity

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Mechanics of Materials

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