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A mass transfer study of a new electrochemical reactor stirred by gases evolved at the counter electrode
Author(s) -
Sedahmed G. H.,
Shemilt L. W.
Publication year - 1982
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450600607
Subject(s) - mass transfer , cylinder , electrolyte , anode , electrochemistry , cathode , analytical chemistry (journal) , electrode , oxygen , copper , chemistry , auxiliary electrode , materials science , mechanics , chromatography , metallurgy , geometry , physics , mathematics , organic chemistry
Mass transfer coefficients were measured for the deposition of copper from acidified copper sulphate solution at a horizontal cylinder cathode stirred by oxygen evolved at a horizontal lead anode placed below the cylinder. Variables studied were: oxygen discharge rate, electrolyte concentration and cylinder diameter. Oxygen discharge was found to increase the rate of mass transfer by a factor ranging from 1.5 to 5 over the natural convection value depending on the rate of oxygen discharge at the lead anode. The data were correlated by the equation: J = 25.0 Re −0.53 Mass transfer coefficients measured at an array of horizontal cylinders agreed with the results for single cylinders. A new electrochemical reactor built of a set of parallel arrays of horizontal cylinders and stirred by the counter electrode gases is proposed as offering an efficient way of stirring with no external stirring power requirement.