Abstract: Low-temperature nitrogen adsorption isotherms are widely used for characterization of carbon materials. However, quite complex physical mechanism of interaction of nitrogen with graphite and micropores hinders a reliable pore size distribution (PSD) analysis. This situation is worsening by a strong regularization procedure which effect on the PSD function is basically unknown. In the present paper we propose a new method of the PSD analysis of activated carbons in the micropore range using hydrogen adsorption isotherms at 77K. We relied on the kinetic Monte Carlo simulation and accurately accounted for the McLachlan surface mediation, quantum correction of the H2 – C potential, and the reduced carbon collision diameter (0.26 nm) determined previously (Ustinov E. Carbon 2016; 100: 52). Analysis of PSDs of several samples of activated carbons has shown that the microporous structure of investigated materials consists of discrete number of slit micropores of specified width. We noted that a population of micropores having width of 0.67-0.69 nm is often observed. This suggests that this group of pores can appear due to burn-off of one layer in the graphite lattice. The kernel for the PSD analysis is presented in the form of regression equation which can be used by researches independently.

Cite: Ustinov E.A. , Gavrilov V.Y. , Mel’gunov M.S. , Sokolov V.V. , Berveno V.P. , Berveno A.V.
Characterization of Activated Carbons with Low-Temperature Hydrogen Adsorption
Carbon. 2017. V.121. P.563-573. DOI: 10.1016/j.carbon.2017.06.026 WOS Scopus РИНЦ AN OpenAlex

Dates:

Submitted:	May 15, 2017
Accepted:	Jun 9, 2017
Published online:	Jun 10, 2017
Published print:	Sep 1, 2017

Identifiers:

Web of science:	WOS:000405294400062
Scopus:	2-s2.0-85020536139
Elibrary:	29300356
Chemical Abstracts:	2017:1038909
OpenAlex:	W2623122390

Citing:

DB	Citing
Web of science	11
Scopus	13
Elibrary	12
OpenAlex	12

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