Mass transfer in annular electrolytic cells with gas stirring

Cavatorta, O. N.; Böhm, Ursula; Giorgio, A. M. Chiappori De Del

doi:10.1007/bf01103827

Cited by 11 publications

(2 citation statements)

References 2 publications

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“…In the case of dilute solutions, the formation of a diffusion layer near the cathode surface reduces the current ef®ciency and ultimately increases the cost of ®nal disposal. All the methods of reducing the thickness of the diffusion layer involve agitation, that is stirring, 18 hydrocyclone-cell, 19 turbulence promoters, 20 rotating electrodes, 21 3-D electrodes, 22¯u idised bed electrodes 23 and¯uidised bed of inert glass beads. 24,25 Assessment of these methods in terms of capital cost, ease of operation and product quality indicate that ā uidised bed cell has the best performance.…”

Section: Introductionmentioning

confidence: 99%

Removal of tin from dilute solutions

Chaudhary

Dando

Grimes

2001

J. Chem. Technol. Biotechnol.

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The¯uidised bed cell of inert glass beads is an electrolytic reactor which is designed to provide higher ion-transfer conditions during electrolysis, thus enabling metals to be removed ef®ciently from dilute solutions. The effectiveness of the method as a means of removing metals from ef¯uent to meet discharge consent levels is studied for the in situ removal of tin from dilute solution (concentration range 0.25±1.00 gdm À3 ). The results show that the combination of high mass transport conditions and a moderately high electrode surface area per unit electrode volume provides a system for continuous removal of metal from dilute solutions. The effects of acid concentration, tin concentration, current density,¯uidised bed agitation, electrode spacing, type of electrode and lead impurities on the removal of tin are reported and expressed in terms of the percentage removal of tin (a Sn ), the ef®ciency of tin deposition (f Sn ), and the energy consumption (W Sn ) for 1 kg of tin deposited. The results show that tin can, under optimised conditions, be removed from dilute solutions to a residual concentration of 0.001 gdm À3 .

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Section: Introductionmentioning

confidence: 99%

Removal of tin from dilute solutions

Chaudhary

Dando

Grimes

2001

J. Chem. Technol. Biotechnol.

View full text Add to dashboard Cite

show abstract

“…There are other electrochemical reactors where the gas is injected from the outside of the cell providing a simple and economical way of stirring the electrolyte (Cavatorta and Bohm, 1987; Cavatorta et al, 1991)…”

Section: Introductionmentioning

confidence: 99%