Abstract:
The present work has been carried out in order to study rate of
mass transfer by different modes of convection in a vertical
parallel plate electrochemical reactor using copper electrodes.
The modes of convection used were: (1) sparging of gas thorough
stationary solution and (2) simultaneous gas and liquid f"low.
Current distributions and mass transfer rates under different
hydrodynamic conditions within the cell were obtained by
measuring currents at different sections of the cathode by
employing the copper deposition reaction from acidified copper
sulphate solution. Mass transfer data were generated by using the
limiting current technique.
Correlations obtained for gas sparging through stationary
electrolyte and simultaneous gas-liquid flow were KgcC ugO.4 and
Ktp = 2.08X10-s(UgO.4/U10.2) respectively. The results were also
correlated with the average bubble diameter (Sherwood number and
Reynolds number based on bubble diameter). These results have
been compared with relevent previous works. Average mass transfer
correlation was obtained for gas sparging through stationary
solution.
An extensive literature survey of industrial electrochemical
processes and electrochemical mass transfer in different forced
convective systems has been included.
