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Present status of the problem of determining the specific surface of adsorbents

  • Physical Chemistry
  • Published:
Bulletin of the Academy of Sciences of the USSR, Division of chemical science Aims and scope

Conclusions

  1. 1.

    Detailed analysis has shown that physically real values of the specific surfaces of nonporous, macroporous, and mesoporous adsorbents can be obtained by two different types of methods, the one based on measurement of the adsorption at monolayer formation, i.e., determination of the so-called monolayer capacity, and the other on comparison of the isotherms for adsorption of a given vapor, first on the adsorbent in question and then on a standard nonporous adsorbent.

  2. 2.

    Although these same methods can be formally applied to microporous adsorbents, they do not lead to values of the monolayer capacity but rather give the adsorption corresponding to complete filling of the micropore volume. The results obtained in such cases are lacking in physical meaning.

  3. 3.

    Two new and independent methods of determining geometrical micropore wall surface areas in model fissure-pore carbon adsorbents are proposed and shown to yield physically real results.

  4. 4.

    Methods for determining micropore volumes and mesopore specific surfaces in adsorbents containing both micropores and mesopores are discussed.

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Authors and Affiliations

  1. Institute of Physical Chemistry, Academy of Sciences of the USSR, Moscow

    M. M. Dubinin

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  1. M. M. Dubinin
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Published by a decision of the editorial board of this journal, dated March 17, 1982.

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 738–750, April, 1983.

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Dubinin, M.M. Present status of the problem of determining the specific surface of adsorbents. Russ Chem Bull 32, 671–681 (1983). https://doi.org/10.1007/BF00953454

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  • DOI: https://doi.org/10.1007/BF00953454

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