The sedimentation-dispersion model for slurry bubble columns with a conical distributor

F. A. Da Silva, F. F. Pironti, A. E. Saez

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

In this work we present a mathematical model to simulate the distribution of solid phase in slurry bubble columns with a conical entrance section. The model is based on the sedimentation—dispersion model that is commonly used to simulate solids distribution in cylindrical columns. The model equations are obtained from a mass balance of solids expressed in terms of a cross-sectional average of the solids concentration. The resulting differential equations are integrated numerically. We have used the model to analyze the effect of the taper angle of a conical distributor on the suspension of solids in a cylindrical spouted bed with pilot scale dimensions. The effects of gas and slurry flow rates, and average and feed solids concentration are also studied. The results show that there is a range of operating conditions for which the solids concentration profile exhibits a maximum within the conical region. For sufficiently high solids concentration, the vicinity of this maximum would be the place where sedimentation of the solid phase starts.

Original languageEnglish (US)
Pages (from-to)157-170
Number of pages14
JournalChemical Engineering Communications
Volume138
Issue number1
DOIs
StatePublished - Jun 20 1995
Externally publishedYes

Keywords

  • Sedimentation-dispersion model
  • Slurry bubble column
  • Spouted bed
  • Tapered column

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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