Cylinder Pore Geometry (Saito/Foley - Micromeritics ASAP 2460 Operator's Manual

ASAP 2460 Operator's Manual
IP =
K =
L =
P =
Po =
R =
T =
where:
Z
S
Z
A

Cylinder Pore Geometry (Saito/Foley)

When you use the Saito-Foley
value of L is determined when the solved-for relative pressure is within 0.1% of the collected absolute
pressure.
-- - K
P 3
 

------ - ------ -
ln =
 
Po 4 RT
where
32
10 =

=
k

=
k
d =
0
where:
D
A
D
S
IP =
K =
L =
246-42800-01 - Aug 2013
interaction parameter (erg-cm
window
Avogadro's number (6.023 × 10
pore width (nucleus to nucleus) (Å)
equilibrium pressure
saturation pressure
gas constant (8.31441 × 10
analysis bath temperature (K), from an entered or calculated value on the Po
and Temperature Options window
= sample equilibrium diameter at zero interaction energy (Å) from the
Horvath-Kawazoe Physical Properties window
= zero interaction energy diameter from the Horvath-Kawazoe Physical
Properties window
10
method, the following equation is solved for each value of P. The

 32
IP 10 1


----------------------- ----------- - 1
k + 1
4
d
0
k = 0
4
the number of cm that are equal to Å
2
– 1.5 – k
 

------------------- -
,
 
k 1 –
k
2
– 4.5 – k
 

------------------- -
,
 
k 1 –
k
D + D
A S
-------------------- -
2
= molecular diameter (Å) from the Horvath-Kawazoe Physical Proper-
ties window
= diameter of sample atom (Å) from the Horvath-Kawazoe Physical
Properties window
interaction parameter (10
Options window
Avogadro's number (6.023 × 10
pore width (nucleus to nucleus) (Å)
4
) from the Horvath-Kawazoe Report Options
23 -1
mol )
7
erg/mol K)

d 2k d
21
   
0  ----- -  0
---- ----
–

   
k
r 32 r

p p
4
= 1.0
0
= 1.0
0
-43 4
erg-cm ) from the Horvath-Kawazoe Report
23
)
Appendix C

10 d 4
 
 0
----
–

 
k
r

p
C-27