Page 17 - Pressure Swing Adsorption

I -ii i
xv, GREEK SYMBOLS

{Jc dimensionless adsorption or desorption time (cPDp/R~)(c /q( ) 1* (for
rnacroporc control) or Dct*_lr} for m1cronore control 0 1
A ratio of dead volume to column volume; non-linearity Parameter q /q
µ chemical potential; v1scos1ty; mean residence time in column 0 5
E parameter ((I - ,);,) (MA/RT)
i (I - e)MA/,R Subscripts
p density
2
u variance of pulse response
T dimensionless time vanable, tv u/L (LDF model); tDclrc 2 foore diffu-
0
sion model)
4> parameter •A'" LP LI /3 A RT
cf> surface potential
n parameter defined by Eq. 5.16; integral function used ID determining
recovery for pressurization with feed

A,B components A (more strongly adsofbed) and B (less strongly.
adsorbed)
B blowctown step
C micropore or mtracrystalline
Cl component ! in m1cropart1cle
C column
DV dead volume fl
e, ec1u1valent value (f()r C()mponcnt i) Ill countercurrcnt ow
model
F feed or feed end
G purge-to-feed ratio . , d for
H,OH,iH high-pressure step, at inlet during h1gh-oressure step, an
comoonent ! during high-pressure step
refers to species i (A or B).
· 1 so
lP, lS species I m m1crooart1c e, ecies l at saturat10n
intermediate · step,
L,oL, iL low-pressure (purge) step, at inlet during low-pressure
and for component ! durmg low-pressure step c
· - -
f ence value 10r
0,01 limitmg or reference vaiue, hm1tmg or re er
component i.
0 outlet or effluent
p macropore or macrooarticle
p
produci end or prcssunzatwn step
PU purge step