Axial segregation of multicomponent solid particles suspended in bubble columns

Ultrasonic technique to determine particle size and concentration in slurry systems

“…This is also in agreement with observations made in the literature (Smith et al, 1986;Matsumoto et al, 1991Matsumoto et al, , 1992 at similar location in the column. The procedure could be extended to systems of unknown particle size using multi-frequency measurements and appropriate calibration curves.…”

Transient discharge of solid particles from upper outlet of vertical bubble columns

“…Solid particles in the effluent were collected, dried, and weighed. Local values of gas and solid holdups were measured by stopping the flows and closing the shutters simultaneously (Al-Dibouni and Garside, 1979;Matsumoto et al, 1992;Hidaka et al, 1992). The solid holdup was defined as the volume fraction of particles suspended in a unit volume of slurry.…”

“…Unsteady-state solid holdup and discharged mass were thus obtained for i-component particles. The parameters used in the model calculation have been correlated by Matsumoto et al (1992) as follows. for D , = 0.07 m, k = 0.311 + 4U,/(1-5)l; for D , = 0.15 m,…”

“…Three-phase fluidization is an important technique for contacting gas, liquid, and solid particles and is widely used in petroleum and biochemical processes. Many works (Imafuku et al, 1968;Kato et al, 1972Kato et al, , 1985Smith and Ruether, 1985;Morooka et al, 1986;Smith et al, 1986;Murray and Fan, 1989;Matsumoto et al, 1989Matsumoto et al, , 1991Matsumoto et al, , 1992Hidaka et al, 1992) have been published on the behavior of solid particles in columns. Fan (1989) summarized results on fundamentals and applications of three-phase fluidization up to 1989.…”

Estimation of particle concentration profiles in a three-phase fluidized bed from experimental data and using the wake model

“…In general, these studies have been carried out with particle systems composed of one or two particle classes. Matsumoto et al (1992) employed spherical particles distributed in 10 size classes, showing that particle concentrations can assume either constant values up to a given height or a maximum concentration at some point in the bed. Using binary mixtures of silica and glass spheres, Matsumoto et al (1997) observed that the concentration of glass spheres decreases with bed height, while the less dense silica particles show a maximum concentration at different bed heights.…”