TY - JOUR
AU - F. Cœuret
AU - T.Z. Fahidy
PY - 2020/07/14
Y2 - 2023/02/07
TI - SCALE UP OF AN ELECTROCHEMICAL CELL OF TWO FACING DISKS WITH RADIAL DIVERGENT LAMINAR FLOW
JF - Revista Mexicana de Ingeniería Química
JA - rmiq
VL - 6
IS - 2
SE - Process engineering
DO -
UR - http://www.rmiq.org/ojs311/index.php/rmiq/article/view/1900
AB - The paper deals with theoretical aspects of scaling-up, and concerns an electrochemical cell working under isothermal mass transport control. The cell contains two closely-facing parallel circular disk electrodes [radius R2, separation distance 2a]. The electrolyte enters the cell through a central circular hole [radius R1] in one disk and flows radially between the disks in the laminar flow regime. Specifically, the work deals with the effect of the scale on stationary liquid-to-disk mass transport. Three cells were used, allowing a maximum scale factor of 12.5. Dimensional analysis of the mass transport problem yields the five dimensionless numbers R2/R1, 2a/(R2-R1), Re, Sh and Sc, to be correlated as: where the coefficient and the numerical exponents α, β, γ, follow from experiments. It is shown how scale-up is approached when the objective is to conserve the mass transport characteristics of a cell. The values of the dimensionless numbers calculated from the experimental data allow the establishment of an empirical correlation valid in a given range of the scale factor, and comparison with an approximate theoretical analytical solution. It is shown how scaling-up considerations are handled, what difficulties are and how, in the absence of a rigorous theoretical solution, experimental results can be employed for cell design up to industrial scale.
ER -