NDLI: Critical discussion of simple adsorption methods used to evaluate the micropore size distribution

Content Provider	Springer Nature Link
Author	Kruk, Michal Jaroniec, Mietek Choma, Jerzy
Copyright Year	1997
Abstract	The well-known simple adsorption methods used to evaluate the micropore size distribution from low pressure adsorption isotherms were examined by employing model isotherms for slit-like graphite micropores obtained from nonlocal density functional theory. It was shown that in the range of pore sizes from about 0.4 to 0.9 nm, the Horvath Kawazoe (HK) method satisfactorily reproduces the shape of the micropore size distribution, but the pore sizes are underestimated. In the case of micropores wider than 0.9 nm, the method fails as the formation of the monolayer on the pore walls produces a peak corresponding to 0.6 nm micropores on the HK pore size distribution. Therefore, the HK method indicates the presence of microporosity even for nonporous samples. The Dubinin-Astakhov adsorption isotherms were also examined and it was shown that their application to represent local adsorption isotherms for homogeneous pores is questionable. However, the adsorption potential distributions seem to be promising for micropore analysis.
Starting Page	209
Ending Page	219
Page Count	11
File Format	PDF
ISSN	09295607
Journal	Adsorption
Volume Number	3
Issue Number	3
e-ISSN	15728757
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	1997-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	carbons porous structure Horvath-Kawazoe method Dubinin-Astakhov equation gas adsorption Industrial Chemistry/Chemical Engineering Engineering Thermodynamics, Transport Phenomena
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering Surfaces and Interfaces

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