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Solid particle mixing in a continously operated fluidized bed reactor

✍ Scribed by K. Wittmann; D. Wippern; H. Schlingmann; H. Helmrich; K. Schügerl

Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
434 KB
Volume
38
Category
Article
ISSN
0009-2509

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✦ Synopsis

In a bench-scale fluidized bed reactor, 20cm in dia., residence time distribution of solid particles (d, = 137 pm) were measured by the radionuclide technique (24NazCO%) in the absence and in the presence of the chemical reaction 2NaHC03+ NazC03 + CO2 + HZO. The residence time distributions were evaluated by a backflow cascade model by nonlinear optimization. The radial and logitudinal concentration profiles of NaHC03 in the emulsion phase of the reactor were measured during steady-state operation. The solid is well-mixed.

The connection of the measured bubble properties with the longitudinal solid dispersion coefficient and the use of the Haines-King-Woodburn model allows to calculate the solid dispersion coefficient in the bubble-free emulsion phase.

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