Page 22 - Separation process engineering

water heat capacity
C
s
capacity factor at flood, Eq. (10-48)

C sb

capacity factor, Eq. (10-8)
d

dampening factor, Eq. (2-57)
D

2
2
diffusivity, Fickan m /s or ft /h
D
distillate flow rate, kmol/h or kg/h
D, Dia

diameter of column, ft or m

D′ col
column diameter, see Table 16-1, ft

d hydraulic

hydraulic diameter of drop, Eq. (13-62), m
d i

impeller diameter, m

d , d d
p
drop diameter, m

characteristic drop diameter, Eq. (16-97b), m
d tube

tube diameter, m

d , D
settler s
diameter of horizontal settler, m
D large , D pilot

diameters of Karr columns for scale-up, Eq. (13-66), m

D°
2
infinite dilution Fickian diffusivity, m /s
D
2
Maxwell-Stefan diffusivity, m /s
D eddy

eddy diffusivity, Eq. (16-111a, b), m/s

D total
total amount of distillate (Chapter 9), moles or kg