Abstract
Copper deposition from acidic aqueous solutions containing copper ion was studied in rectangular fluidized bed electrodes for liquid-solid and gas-liquid-solid systems. The effective specific resistance of particle phase, ρm, was determined by comparison of the experimental potential profile with the theoretical one.
The value of ρm decreased with increase in gas velocity, and the gas flow increased the total cell current by 10-30% at a given cell voltage in the range of 15 to 30% bed expansion. No explicit effects of fluidized bed height and particle diameter on ρm were observed.
The overall effective specific resistance of bed, ρb, was measured with an alternating current bridge circuit, and the relationship between ρm and ρb is discussed. The charge transfer in the particle phase was analysed by the parallel effective resistance model based on the charge conductive mechanism and the collision mechanism.
