1976 Volume 49 Issue 12 Pages 3372-3375
The packed-bed electrode has been investigated in order to scale up the cell capacity by introducing three-dimensional electrode. The reactions of aniline formation by cathodic reduction of nitrobenzene and Fe(II) ion formation by cathodic reduction of Fe(III) ion were studied. When bed particles with high electric conductivity were used, the effective depth of the packed-bed where the electrode reaction took place was very small. However, when particles with moderate resistance were used, the effective depth increased. This is because the potential distribution in the bed material is the same as that in the electrolyte in the bed, the potential difference between particles and electrolyte thus being maintained constant at any position in the bed. From the standpoint of scaling up the cell capacity, this type of electrode can be effectively applied.
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