Page 42 - Separation process engineering

constant in Langmuir isotherm, same units as q/c, Eq. (18-6c)
a

argument for error function, dimensionless, Eq. (18-70), Table 18-7

a p
surface area of the particles per volume, m –1

A
c
cross-sectional area of column, m 2

A w

wall surface area per volume of column for heat transfer, m –1
b

–1
constant in Langmuir isotherm, (concentration) , Eq. (18-6c)
c
A
3
3
concentration of species A, kg/m , kmol/m , g/L, etc.
c i

3
3
concentration of species i, kg/m , kmol/m , g/L, etc., or
c i

concentration of ion i in solution, typically equivalents/m 3

concentration of species i that would be in equilibrium with , same units as c i

average concentration of solute in pore, same units as c i

c pore

fluid concentration at surface of adsorbent pores, same units as c i

c i,surface

fluid concentration at surface of particles, ε = 0, same units as c
p i
c
Ri
concentration of ion i on the resin, typically equivalents/m 3
c RT

total concentration of ions on the resin, typically equivalents/m 3

c T

total concentration of ions in solution, typically equivalents/m 3
C i

constant relating solute velocity to interstitial velocity, dimensionless, Eq. (18-
15e)

C P,f

heat capacity of the fluid, cal/(g °C), cal/(mol °C), J/(g K), etc.