Page 43 - Separation process engineering

C P,p

heat capacity of particle including pore fluid, same units C P,f

C P,s
heat capacity of the solid, same units as C
P,f
C
P,w
heat capacity of the wall, same units as C
P,f
d p

particle diameter, cm or m

D
desorbent rate in SMB, same units as F

D/F
desorbent to feed ratio in SMB, dimensionless

D col

column diameter, m or cm
D
2
2
diffusivity including both molecular and Knudsen diffusivities, m /s or cm /s
D effective

2
2
effective diffusivity, m /s or cm /s, Eq. (18-4)
D K

2
2
Knudsen diffusivity, m /s or cm /s, Eq. (18-51)
D molecular
2
2
molecular diffusivity in free solution, m /s or cm /s
D s

2
2
surface diffusivity, m /s or cm /s, Eq. (18-53)
erf
error function, Eq. (18-70) and Table 18-7

E D
2
axial dispersion coefficient due to both eddy and molecular effects, m /s or
2
cm /s
E DT

2
2
thermal axial dispersion coefficient, m /s or cm /s
E
eff
effective axial dispersion coefficient, same units E , Eq. (18-68)
D
F
3
3
volumetric feed rate, e.g., m /h, cm /min, liter/h
h p