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Evaluation of Inaccessible Pore Structures in Random Porous Solids

Published online by Cambridge University Press:  10 February 2011

N. Yoshizawa ,
Y. Yamada ,
M. Shiraishi ,
K. Kaneko  and
N. Setoyama
N. Yoshizawa
Affiliation:
Carbon Materials laboratory, National Institute for Resources and Environment, Tsukuba, 305 Japan
Y. Yamada
Affiliation:
Carbon Materials laboratory, National Institute for Resources and Environment, Tsukuba, 305 Japan
M. Shiraishi
Affiliation:
Carbon Materials laboratory, National Institute for Resources and Environment, Tsukuba, 305 Japan
K. Kaneko
Affiliation:
Department of Chemistry, Chiba University, Chiba 263, Japan
N. Setoyama
Affiliation:
Department of Chemistry, Chiba University, Chiba 263, Japan
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Abstract

A fine pore characterization method is investigated for a disordered solid including inaccessible pores. Here inaccessible pores denote ones into which N2 molecule cannot access at 77 K. Activated carbons prepared differently are examined. The basic idea of the method is as follows: (1) Pores are classified into effective micropores (further devided into smaller and larger micropores distinguished from DR (Dubinin-Radushkevich) analysis and inaccessible pores. (2) Volume fraction is determined for each type of pore considering densities. (3) Debye-Bueche plot derived from SAXS analysis is used to estimate the average transversal length of solid part and pore, respectively, convinedwith their volume fractions obtained from (1) and (2). (4) In case of a porous systemwith a symmetrical shape of pores, relative number and size of inaccessible pore to effective micropore are calculated.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 407: Symposium M – Disordered Materials and Interfaces-Fractals, structure and Dynamics , 1995 , 51
Copyright
Copyright © Materials Research Society 1996

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References

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