Electrochimica Acta, Vol.41, No.4, 543-548, 1996
Mass-Transfer Rates in a dem Electrochemical-Cell
The mass transfer characteristics of a DEM electrochemical cell were studied in both the presence and absence of a Netlon plastic mesh turbulence promotor. Two different modes of operation were used, one with a divided and the other with an undivided cell. Mass transfer coefficients were determined using the limiting current technique, with the cathodic reduction of potassium ferricyanide ion in excess of potassium carbonate as the indicator electrode reaction. Measurements were carried out over a range of Reynolds number from 550-4000 at a constant temperature of 20 degrees C and a constant Schmidt number of 1465.4. Results have shown that the introduction of Netlon plastic mesh increases mass transfer rates by 50-100% compared to those achieved in its absence, and produces a more uniform distribution of mass transfer over the electrode surface.