STUDIES ON IONIC MASS TRANSFER IN AN ELECTROLYTIC CELL IN THE PRESENCE OF SEMICIRCULAR TEETHED PROMOTERS

Limiting current densities were measured at copper microelectrodes fixed flush with the surface of a rectangular Perspex electrode support firmly fixed in an electrolytic cell. Semicircular teethed promoters were inserted at the bottom of the cell. The electrolyte was equimolal potassium ferricyanide, pota ssium ferrocyanide and excess sodium hydroxide. The mass transfer data were obtained using diffusion controlled reaction (reduction of ferricyanide ion). The mass transfer coefficient increased with increased flow rate of the electrolyte and height of the promoter and decreased with increase in spacing between the promoters. And the correlation obtained is J D = 60.1 R e - 0.66 (h/s) 0.13