Models Included; Kelvin Equation With Halsey Thickness Curve; Kelvin Equation With Harkins And Jura Thickness Curve - Micromeritics ASAP 2020 Confirm Operator's Manual

Appendix F

Models Included

Kelvin Equation with Halsey Thickness Curve

N2 - Halsey Thickness Curve
Geometry:
Substrate:
Category:
Method:
The kernel function is calculated using the Halsey equation with standard parameters:
The nitrogen properties used in the Kelvin equation are:
Surface tension = 8.88 dynes cm
Molar density
N2 - Halsey Thickness Curve
Geometry:
Substrate:
Category:
Method:
The calculation is the same as above except that cylindrical geometry is assumed.
Reference:

Kelvin Equation with Harkins and Jura Thickness Curve

N2 - Harkins and Jura Thickness Curve
Geometry:
Substrate:
Category:
Method:
The kernel function is calculated using the Harkins and Jura equation with standard
parameters:
F-14
Slit
Average
Porosity
Nitrogen at 77 K
1/3
– 5.00
 
----------------------
t = 3.54
 
 
ln P/Po
-1
= 0.02887 g cm -3
Cylinder
Average
Porosity
Nitrogen at 77 K
G. Halsey, J. Chem. Phys 16, 931 (1948)
Slit
Average
Porosity
Nitrogen at 77 K
ASAP 2020 Confirm
202-42811-01 - Mar 2011