Enhancement Of Single Liquid Drop MassTransfer Coefficients In A Perforated PlateColumn

Abstract

Mass transfer coefficients (MTCs) have been measured for single solvent drops rising through non flowing and flowing water in a short section of perforated plate extraction colunin and have been compared with the coefficients measured for free rise conditions in an elnpty column for different systems. Single drop mass tra~isfer coefficients were determined as a function of drop size, mass transfer direction, distance between plates and down flow of the continuous phase. The degree of enha~icement of the dispersed phase film coefficie~it due to the presence of plates has been ascertained. From the data obtained, it is co~icluded that only a moderate enhancement due to the presence of down flow is achieved for single liquid drop with a slightly increase in the drop size with increasing downflow and the coefficients for mass transfer directioii from the dispersed phase into the continuous phase (d + c) are slightly higher than that for the opposite direction. (c+ d).