Influence of pressure on the minimum fluidization velocity

The influence of pressure on minimum fluidization velocity has been measured in a pressurized fluidized bed. Three different bed materials, corresponding to Geldart's group B or group D particles, were investigated at pressures between 0.1 and 1.6 MPa. The onset of fluidization was determined b...

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Bibliographic Details
Published inChemical engineering science Vol. 46; no. 2; pp. 637 - 640
Main Authors Olowson, P.A., Almstedt, A.E.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 1991
Elsevier
Subjects
Applied sciences
Chemical engineering
Exact sciences and technology
Fluidization
Fluidization
Minimum velocity
Experimental study
Medium effect
Pressure
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Summary:The influence of pressure on minimum fluidization velocity has been measured in a pressurized fluidized bed. Three different bed materials, corresponding to Geldart's group B or group D particles, were investigated at pressures between 0.1 and 1.6 MPa. The onset of fluidization was determined both visually and by pressure drop measurements. The results show a clear decrease in the minimum fluidization velocity with increasing pressure. The experimental results are in good accord with results obtained using the Ergun equation. A number of simplified correlations derived from the Ergun equation were also investigated. While many of these give a good description of the pressure effect, their accuracy varies significantly for different bed materials.
ISSN:0009-2509
1873-4405
DOI:10.1016/0009-2509(91)80023-R