Abstract
A theoretical analysis is presented for the current-time, voltage-time and power-time relationships and for the energy requirement and process time for the cathodic extraction of copper in a porous flow-through electrode operated as a batch recirculation system under galvanostatic conditions. The anode reaction considered is O2 evolution and the secondary cathode reaction is H2 evolution. The copper extraction is under diffusion control, plug flow is assumed in the reactor and perfect mixing in the reservoir. Comparison is made with the case of operation at the limiting current throughout the process duration.
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