Chlorine evolution in a centrifugal field

Intensification of the electrochemical production of chlorine and sodium hydroxide (i.e., the chlor-alkali process) was demonstrated in a centrifugal acceleration field. This intensification was shown by comparing the cell voltages and the anode potentials for a cell operated with and without a centrifugal field applied using the linear sweep voltammetric, galvanostatic and potentiostatic polarizations. Under industrial chlor-alkali electrolysis conditions, a cell voltage reduction of up to 600 mV and an anode potential reduction of up to 360 mV at 600 mA cm(-2) were achieved by using a relative acceleration rate of 190 g with an acidic saturated NaCl solution at 80 degreesC. The relationships between the cell performance and relative acceleration rate, for different anode materials, temperature and NaCl concentration are reported.