Micromeritics Gemini VII 2390a, Operator'S Manual, Page: 361 / 426

t
13.99
0.034
P
/
Po
 
log –
---------------------------------------------
 
 
1/2
=
Gemini VII Appendix F
239-42828-01 - Dec 2012 F-15
Kelvin Equation with Harkins and Jura Thickness Curve
N2 - Harkins and Jura Thickness Curve
The kernel function is calculated using the Harkins and Jura equation with standard parameters:
The nitrogen properties used in the Kelvin equation are:
N2 - Harkins and Jura Thickness Curve
The calculation is the same as above except that cylindrical geometry is assumed.
Geometry
Slit
Substrate
Average
Category:
Porosity
Method:
Nitrogen at 77 K
Surface tension =
8.88 dynes cm
-1
Molar density =
0.02887 g cm
-3
Geometry
Cylinder
Substrate
Average
Category:
Porosity
Method:
Nitrogen at 77 K
Reference
: W. D. Harkins and G. Jura, J.A.C.S. 66, 1366 (1944).
J. H. DeBoer et al., J. Colloid and Interface Sci. 21, 405 (1966).