Title :
Several effects of electric fields on liquid extraction
Author :
Yang, Wenrui ; Carleson, Thomas E.
Author_Institution :
Dept. of Chem. Eng., Idaho Univ., Moscow, ID, USA
Abstract :
The effects of electric fields on dispersed liquid-phase flow behavior and mass transfer efficiency have been investigated for several liquid-liquid systems using single/multiple-nozzle extraction columns. Drop size, drop surface charge density, and drop terminal velocity were correlated with the applied field strength by typical models. Drop surface area and velocity were increased significantly by the electric fields. The end effects were separated from the overall mass transfer process by varying the plate gap. The mass transfer coefficients for drop freefall region were calculated. The overall extraction efficiencies increased 51% for heptane-furfural and 24% for the toluene-water-methanol system
Keywords :
drops; electrohydrodynamics; mass transfer; dispersed liquid-phase flow; droplets; electric field effects; end effects; extraction columns; field strength; liquid extraction; mass transfer efficiency; models; size; surface area; surface charge density; terminal velocity; velocity; Chemical industry; Dielectric liquids; Dispersion; Electrostatic processes; Fluid flow; Gravity; Petroleum industry; Solvents; Temperature; Vents;
Journal_Title :
Industry Applications, IEEE Transactions on
