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

Volume

26

Issue

2

fYear

1990

Firstpage

366

Lastpage

373

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;

fLanguage

English

Journal_Title

Industry Applications, IEEE Transactions on

Publisher

ieee

ISSN

0093-9994

Type

jour

DOI

10.1109/28.54265

Filename

54265