Using the sedimentation-diffusion model for catalyst dispersion the steady-state performance of semi-batch bubble column reactors has been studied over a wide range of mass transfer and reaction groups for reactions that are described by power law and Langmuir-Hinshelwood (L-H) type of kinetics. The effect of catalyst dispersion on conversion is found to be a complex function of mass-transfer and reaction parameters. Nonuniform catalyst distribution has a detrimental effect on the values of conversion for systems following nth-order kinetics. However, the use of a L-H rate form predicts improved conversions for some values of model parameters in the presence of solid dispersion. Also the reactor model accounts exactly for volume change effects during reaction. It is found that volume contraction enhances conversion for reactions following the nth-order kinetics, but that the opposite is possible with the L-H kinetics.
ASJC Scopus subject areas
- Chemical Engineering(all)