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Fluid ‐ particle mass transfer in a packed bed
Author(s) -
Bradshaw R. D.,
Bennett C. O.
Publication year - 1961
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690070114
Subject(s) - mass transfer , pellets , packed bed , chemistry , mass transfer coefficient , reynolds number , diffusion , spheres , particle (ecology) , thermodynamics , pellet , analytical chemistry (journal) , mechanics , materials science , chromatography , physics , turbulence , composite material , oceanography , astronomy , geology
Mass transfer coefficients have been measured for air flowing through a bed of naphthalene pellets. Results were obtained for ⅜‐in. spheres and for ½, ⅜, and ¼‐in. cylinders in a bed 4 in. in diameter and packed to heights varying from 5 to 10 in. Radial concentration profiles were obtained for some conditions, from which the radial variation of the mass transfer coefficient was determined. The point‐values of k g follow an equation of the form k g = a G b . From mixed outlet concentrations, values of k gav and j d , corrected for the effect of axial diffusion, have been obtained for all the pellet sizes as functions of mass velocity and Reynolds number, respectively.