Page 23 - Separation process principles 2

Nomenclature xxvii

partial fugacity coefficient dry-packing resistance coefficient given by
froth density (6-113)
effective relative density of froth defined by fractional entrainment; loading ratio defined by
(6-48) (15- 126); sphericity
particle sphericity acentric factor defined by (2-45); segment frac-
tion in UNIFAC method
segment fraction in UNIQUAC equation; V/F
in flash calculations; E/F in liquid-liquid Subscripts
equilibria calculations for single-stage extrac-
tion; sphericity defined before Example 15.7

A solute

a,ads adsorption LM log mean of two values, A and B = (A - B)/
avg average ln(AB)
LP low pressure
B bottoms
M mass transfer; mixing-point condition; mixture
b bulk conditions; buoyancy
m mixture; maximum
bubble bubble-point condition
max maximum
C condenser; canier; continuous phase
min minimum
c critical; convection; constant-rate period
N stage
cum cumulative
n stage
D distillate, dispersed phase; displacement
0 overall
d drag; desorption
o,O reference condition; initial condition
d,db dry bulb
out leaving
des desorption
OV overhead vapor
dew dew-point condition
P permeate
ds dry solid
R reboiler; rectification section; retentate
E enriching (absorption) section
r reduced; reference component; radiation
e effective; element
res residence time
eff effective
S solid; stripping section; sidestream; solvent;
F feed stage; salt
f flooding; feed; falling-rate period s source or sink; surface condition; solute; satu-
G gas phase ration
GM geometric mean of two values, A and B = T total
square root of A times B t turbulent contribution
g gravity V vapor
gi gas in W batch still
go gas out w wet solid-gas interface
H,h heattransfer w,wb wet bulb
I, I interface condition ws wet solid
i particular species or component X exhausting (stripping) section
in entering x,y,z directions
irr irreversible at the edge of the laminar sublayer
j stage number 0 surroundings; initial
k particular separator; key component infinite dilution; pinch-point zone
L liquid phase; leaching stage Superscripts

E excess; extract phase

F feed o pure species; standard state; reference
ID ideal mixture condition
(k) iteration index p particular phase
R raffinate phase
LF liquid feed