Conference paper

A Study of the Mechanism of Micropore Filling. I. Molecular Sieve Effects

Albert C. Zettlemoyer ; Center for Surface and Coatings Research, Lehigh University, Bethlehem, PA 18015, USA
Phillip Pendleton ; Center for Surface and Coatings Research, Lehigh University, Bethlehem, PA 18015, USA
Fortunato J. Micale ; Center for Surface and Coatings Research, Lehigh University, Bethlehem, PA 18015, USA

Abstract

The adsorptive properties of two microporous carbons and a
microporous silica have been investigated and compared using
argon and benzene. The micropore volumes determined using the
Theory for Volume filling of Micropores (TVFM) agreed to within
40/o of the total micropore volumes determined from the a8 method
of pore analysis. Adsorption data of argon at 77 °K and benzene
at 298 °K on the microporous carbons were interpreted in terms
of the Dubinin-Astakhov and Dubinin-Radushkevich equations,
and Weibull and Gaussian distributions of the adsorption free
energy with pore volume, respectively. The Weibull distribution
was found to apply better than the Gaussian distribution, although
variations from linear D-A plots occurred. The adsorption data on
the silica sample were best interpreted as a two-term D-R equation.
Plots of the distribution of adsorption energy with pore volume of
the silica sample for each term of the D-R equation and their
effective contribution to the cumulative distribution curve gave
conclusive evidence of the ordering of the adsorption process
within micropores of varying dimensions.

Keywords

Hrčak ID:

194187

URI

https://hrcak.srce.hr/194187

Publication date:

9.11.1983.

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