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Contribution à l'étude du transfert de chaleur à la paroi dans les récteurs à lit fluidisé gaz‐liquide‐solide à faible vitesse de liquide
Author(s) -
SaberianBroudjenni M.,
Wild G.,
Midoux N.,
Charpentier J. C.
Publication year - 1985
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.5450630405
Subject(s) - kerosene , thermodynamics , materials science , heat transfer , liquid phase , cyclohexane , heat transfer coefficient , porosity , chemistry , physics , composite material , organic chemistry
A study has been made of the wall to bed heat transfer in three‐phase fluidized beds with cocurrent upflow of the gas and the liquid, the liquid being the continuous phase. The experiments were done using five different liquids (tetra‐chloroethene, cyclohexane, kerosene, gas oil, water), three different kinds of particles (glass beads, porous alumina spheres and cylinders) at liquid velocities below 30 mm/s and gas velocities from 10 to 150 mm/s. The phenomena observed with a foaming liquid are described. Different literature correlations proved to be non‐applicable at the velocities used in this work; moreover, they are not able to take into account the influence of the nature of the liquid. Therefore, a new correlation which fits well our results is proposed. The areas requiring further investigation before a safe prediction of the wall heat transfer coefficient in three phase fluidized beds can be possible are detailed.