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Effect of geometrical and operating mixing parameters on copper adsorption on zeolite NaX

The successful design of the batch reactor and conditions in which heterogeneous reaction is carried out must take into account the effect of hydrodynamic conditions but not only through mixing speed. This design requires knowledge of the effect of various types of impeller, their position, size, and energy input. In this work, kinetic experiments were conducted at different impeller position and N/NJS ratio values (impeller speed/minimum impeller speed for complete suspension). The effect of the turbine impeller off-bottom clearance and N/NJS ratio on power consumption was also studied. The Ritchie model, Mixed surface reaction and diffusion-controlled adsorption kinetic model, and Weber–Morris model were used for assessment of model parameters and the slowest step of the process. The results indicate that the impeller position and N/NJS ratio influence kinetic and power consumption. The greatest difference in power consumption at different impeller positions was obtained for N/NJS = 1. Also, it was found that diffusion starts to affect overall kinetic at N/NJS = 0.7.

Zeolite ; Impeller off-bottom clearance ; Power consumption ; Adsorption ; Kinetic

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