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Mass transfer coefficients of suspended particles were measured in agitated vessels and in bubble columns. Four sizes of agitated vessels (diameter: 9.5, 17.5, 20, 40 cmØ) including both fully baffled and non-bafHed conditions and two sizes of bubble columns (diameter: 10, 20cmØ) were used. Particle sizes ranged from 60 to 1100 μØ including both spherical beads (ion exchange resin) and granules (benzole acid, KMnO4, and β-naphthol). We correlated the mass transfer coefficients using the surface factor as Sh=2+0.4(εdp4/ν3)1/4•Sc1/3•φcwith a standard deviation of 30.8% for the Sherwood number. Sh-: Sherwood number, e cm2/sec3: rate of energy dissipation, dp cm: specific surface diameter, v cm2/sec3: kinematic viscosity, Sc -: Schmidt number and Øc -: surface factor.
Sano et al. (Tue,) studied this question.