Novel Scaling Parameter for Circulating Fluidized Beds

Ralf Kehlenbeck, John Yates, Renzo Di Felice, Hermann Hofbauer, Reinhard Rauch

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30 Citations (Scopus)


Experimental results of a one-fifth scale cold laboratory model of a circulating fluidized-bed pilot plant for biomass gasification are reported here. Measurements revealed that the solid circulation rate is a function of the superficial gas velocity in the riser and the total mass load in the system. A novel dimensionless scaling parameter introduced describes the dimensionless mass turnover. Experiments were carried out varying both particle diameter, 170 μm ≤ d ≤ 860 μm, and density, 1,480 kg/m3 ≤ ρs ≤ 8,900 kg/m3. An excellent prediction for the mass turnover was obtained for mass loads varying from 1 to 15 kg and throughout the whole particle size and density range using the equations derived. Furthermore, the particle-size distribution is a scaling parameter to be matched between a model and an industrial plant. Correspondence concerning this article should be addressed to J. Yates.

Original languageEnglish
Pages (from-to)582-589
Number of pages8
JournalAIChE Journal
Issue number3
Publication statusPublished - Mar 1 2001


ASJC Scopus subject areas

  • Biotechnology
  • Environmental Engineering
  • Chemical Engineering(all)

Cite this

Kehlenbeck, R., Yates, J., Di Felice, R., Hofbauer, H., & Rauch, R. (2001). Novel Scaling Parameter for Circulating Fluidized Beds. AIChE Journal, 47(3), 582-589.