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Étude hydrodynamique des lits fluidisés sous vide et sous haute température
Author(s) -
Ruvalcaba J. Ramiro Rodriguez,
Caussat Brigitte,
Hemati Merhdji,
Couderc JeanPierre
Publication year - 1999
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450770107
Subject(s) - fluidization , atmospheric pressure , geology , environmental science , thermodynamics , physics , fluidized bed , meteorology
Abstract After having analyzed the few literature results concerning fluidized beds hydrodynamics under reduced pressure, new theoretical elements are proposed which provide an estimation of the beginning and finishing fluidization velocities. Numerous experimental results(U mfapp , U mb , U mp , ϵ mf , ϵ mb , ϵ mp ), obtained at 20 and 500°C, are then presented for several sub‐atmospheric pressures. Finally, f& the first time, at leastto our knowledge, by high frequency recording pressure drops through the bed, the influence of pressure decreases on the hydrodynamics is accurately analyzed.