Absorption and stripping - Principles of Chemical Separations with Environmental Applications - page 158

Figure 6.1 Generalized correlation for flooding and pressure drop. L. McCabe,
Unit Operations of Chemical Engineering . Reproduced with permission of
McGraw-Hill companies.

min), and A is area (ft 2 ),
increasing the diameter for a constant volumetric flowrate results in a lower velocity.
Figure 6.1 is a logarithmic plot of

where Q is volumetric flowrate (ft 3

/ min), v is velocity (ft /

G y F p µ

0 . 1

ρ y
ρ x − ρ y ,

G x
G y

x

vs

g c ( ρ x − ρ y ) ρ y

ft 2 where G x = mass velocity of liquid, lb / · s

ft 2

G y = mass velocity of gas, lb / · s

packing factor, ft − 1 F p =

ft 3 ρ x = density of liquid, lb /

ft 3 ρ y = density of gas, lb /

µ x = viscosity of liquid, cP

s 2

g c = Newton's-Law proportionality factor, 32.174 ft · lb / lb f · .

Foragiven gas with solute and liquid solvent pair, the G x / G ratio can be set

using a comparison of the equilibrium line to the operating line. This concept will be
discussed later in the chapter. These two ratios are equal because the area term cancels

G y or L /