Solid hold up in gas fluidised beds

N. Hilal, D. J. Gunn

Research output: Contribution to journalArticlepeer-review


The hold-up of particles has been studied in two gas fluidised beds of 89 and 290 mm diameter. Particles of different materials, density from 1228 to 11 400 kg/m3 and size from 50 μm to 1 mm were fluidised. Four distributors were examined in the larger diameter bed. Power law and exponential correlation of the expansion were examined. All of the experimental data for open beds and for bed with tubular inserts with different distributors were correlated within experimental error by the equation, ρb/ρmf=exp [- λ U*(U/Umf- 1)]. The dimensionless group U* is defined as Ut(ρ/μg)1/3 where Ut is the particle terminal velocity. The constant λ has a value of 0.0052 for open beds and 0.0036 for fluidised bed with tubular inserts.

Original languageEnglish (US)
Pages (from-to)373-379
Number of pages7
JournalChemical Engineering and Processing
Issue number4
StatePublished - Apr 2001


  • Distributor
  • Fluidisation
  • Hold-up
  • Particles

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering


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