Page 281 - Adsorption Technology & Design, Elsevier (1998)

256 Nomenclature

initial quantity adsorbed at particle periphery
qoi
residual amount adsorbed per unit weight of adsorbent
qo
amount adsorbed in equilibrium with feed concentration
qo*
ql'eS residual amount adsorbed per unit weight of adsorbent
q~
final quantity adsorbed after infinite time
Q
heat of adsorption
r distance between molecule and surface
r
radius variable
re radius of crystal
R radius variable of crystal
R raffinate flowrate per unit cross section of column
R rate of adsorption
R cross--over ratio
radius
R
Rg universal gas constant
Rh rate of heat transfer
rate at which molecules strike unit area of surface
Rm
Re (= pudp/ll) Reynolds number
Rp pellet radius
s average number of molecules adsorbed per zeolite cage
S entropy
S flowrate of adsorbed phase per unit cross section of column
S area of pellet cross section
specific (per unit mass) surface area of adsorbent
Sg
(= ll/pD) Schmidt number
Sc
Sh (= kdp/D) Sherwood number
St (= kL/u) Stanton number
t time
breakthrough time
tb
t~ stoichiometric time
T temperature
Tf fluid phase temperature
To initial temperature
T~ solid phase temperature
Tw wall temperature
u
interstitial velocity
flow rate of solid
Us
U potential energy
v volume adsorbed
v linear flowrate in BDST equation
V volume
v pellet volume