Principles of Mass Transfer and Separation Processes by DUTTA BINAY K

Author:DUTTA, BINAY K. [DUTTA, BINAY K.]
Language: eng
Format: epub
Publisher: PHI Learning Private Limited
Published: 2013-06-26T00:00:00+00:00

Vi = Hm ND K FGr I12//13 L¥ -4 OP F 730 I12 Fd32 J13F I

F I

di i c J Gd32J= M()(.)(.)

s 0 0135 QH HI13

= 0 0631GD

L F I13d32 = 0.053(1 + 4.42Vi)0.6(We)–0.6 =(. )Di K

K

GDi KHrdK HDi 1030

K N Fd32 J

Hi K O(73850)–0.6

D

i

M

1+ ( . )(.0 0631)Gd32 J

H P

N Q

d32 = 6.5 ¥ 10–5fiDi

fi d32 = 7.15 ¥ 10–5 m = 0.0715 mm

The second correlation gives a much smaller value of the Sauter mean drop diameter.

6j = ()( .0 1616) = 194 ¥103 23fi Interfacial area of contact: a = d32 510-4 m/m Correlations for mass transfer coefficients

The dispersed phase mass transfer coefficient can be approximately calculated from the following relation (Treybal, 1963) assuming the drops to be rigid. A drop can generally be considered ‘rigid’ if it is smaller than about 1mm and the interfacial tension is more than 15 dyne/cm.

(Sh

d) =

kd

d 32 = 6.6 (8.26)Dd where (Shd) is the dispersed phase Sherwood number, kd is the dispersed phase mass transfer coefficient, and Dd is the diffusivity of the solute in the dispersed liquid. More correlations for the dispersed phase mass transfer coefficient in an agitated liquid–liquid dispersion have been suggested by Skelland and Xien (1990).

The continuous phase mass transfer coefficient can be calculated from the Skelland and Moeti (1990) correlation.

Download

Copyright Disclaimer:
This site does not store any files on its server. We only index and link to content provided by other sites. Please contact the content providers to delete copyright contents if any and email us, we'll remove relevant links or contents immediately.