The technique is based on a model of mass-transfer-effective bubble interactions which permits computation of a mass transfer driving force correction factor.
Results are given for the effects of impeller rotational speed or mechanical agitation power, gas superficial velocity and total ionic strength on the mass-transfer-effective bubble coalescence frequency and specific interfacial area.
This paper describes a new technique for concurrently evaluating the mass-transfer-effective bubble coalescence frequency and specific interfacial area of mechanically agitated gas-aqueous electrolyte solution dispersions by the chemical method.
The main cause of deviation is believed to concern uncertainties in mass transfer and effective mass transfer area correlations.
The accuracy of the knowledge of mass transfer parameters (effective moisture diffusivity, mass transfer Biot number and mass transfer coefficient) in the case of frying food, is essential and important for designing, modeling and process optimization.
Then, on this basis, a semi-theoretical model predicting the overall efficiency of the CRB is developed, which involve calculations of mass transfer coefficients, effective interfacial area, number of mass transfer units, Murphree point efficiency, and Murphree stage efficiency.
The agreement between experiment and theory not only shows the reliability of the new equation but evidences the action of a hitherto disregarded mass transfer mechanism effective in a low current density range in absence of forced flow.
Magnetite pellets of different porosities were used as porous packing, also, and, by Fourier analysis of outlet tracer pulse dispersion, external mass transfer and effective diffusion coefficients were obtained, assuming the validity of the Kubin-Kucera model.
The pores left after the removal of the magnesium oxide in the layer was also favorable for the mass transfer and effective for the electrode reaction enhancement unless an excessive amount of magnesium oxide was added to generate disorder in the layer.
Initially biochemical reaction limitations were effective; thereafter, mass transfer resistances became more effective.
