Micromeritics Gemini VII 2390a, Operator'S Manual

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Appendix F Gemini VII
F-12 239-42828-01 - Dec 2012
This model is particularly useful for characterizing carbon single-wall nanotubes. The reported pore
size range is from 3.5 to 1000 Å.
N2 - Carbon Cylinder, multi-wall nanotube by NLDFT

Ar - Argon Cylinder, multi-wall nanotube by NLDFT
Model isotherms were calculated using the prescriptions of Tarazona for density dependent weighting
functions and cylindrical pore geometry. The pore wall potential is described by the Lennard-Jones
potential of interaction between a gas molecule and multiple concentric graphitic surfaces of infinitely
long cylinders.
This model is particularly useful for characterizing carbon multi-wall nanotubes. The reported pore
size range is from 3.5 to 1000 Å.
Ar - Zeolites H-Form by NLDFT
Model isotherms were calculated using the prescriptions of Tarazona for density dependent weighting
functions and cylindrical pore geometry. The pore wall potential is described by the Lennard-Jones
potential of interaction between a gas molecule and the oxide surface of an infinitely long cylinder.
This model is particularly useful for characterizing oxides and H
+
and (NH
4
)
+
exchanged zeolites. The
reported pore size range is from 3.5 to 300 Å.
Reference
: P. Tarazona, Phys. Rev. A 31: 2672 (1985).

Idem, Phys. Rev. A 32: 3148 (1985).

P. Tarazona, U. M. B. Marconi, and R. Evans, Mol. Phys. 60: 573
(1987).
Geometry
Cylinder
Substrate
Carbon
Category:
Porosity
Method:
Nitrogen at 77 K; Argon at 87 K
Reference
: See above reference.
Geometry
Cylinder
Substrate
Zeolite
Category:
Porosity
Method:
Argon at 77 K