Abstract
In a bench-scale fluidized bed reactor, 20cm in dia., residence time distribution of solid particles ( d p , = 137μm) were measured by the radionuclide technique ( 24Na 2C0 3) in the absence and in the presence of the chemical reaction 2NaHCO 3→Na 2C0 3+C0 2+H 2O. The residence time distributions were evaluated by a backflow cascade model by nonlinear optimization. The radial and logitudinal concentration profile of NaHCO 3 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 allow
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