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Russian Chemical Bulletin

, Volume 48, Issue 8, pp 1462–1466 | Cite as

The heat of adsorption of water on nonporous hydrophilic carbon adsorbents in the model of two-stage adsorption

  • G. I. Berezin
Physical Chemistry
  • 44 Downloads

Abstract

The behavior of integral and differential heats of adsorption of water in the region of transition from the first stage of adsorption (formation of clusters) to the second stage (formation of a stretched liquid film) was considered. The curve of integral heat of adsorption has an inflection at the transition point, and the differential heat of adsorption changes jumpwise. The values of these effects were estimated by the simplest model of formation of one and two hydrogen bonds between a water molecule and an adsorption center on the surface of the carbon adsorbent. Curves of differential heat of adsorption with transition points for real systems are presented.

Key words

heat of adsorption carbon adsorbents stretched liquid water 

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References

  1. 1.
    G. I. Berezin, G. A. Petukhova, N. S. Polyakov, and M. L. Gubkina,Izv. Akad. Nauk, Ser. Khim., 1997, 464 [Russ. Chem. Bull., 1997,46, 443 (Engl. Transl.)].Google Scholar
  2. 2.
    G. I. Berezin,Zh. Fiz. Khim., 1995,69, 304 [Russ. J. Phys. Chem., 1995,69 (Engl. Transl.)].Google Scholar
  3. 3.
    G. I. Berezin, R. Sh. Vartapetyan, A. M. Voloshchuk, G. A. Petukhova, and N. S. Polyakov,Izv. Akad. Nauk, Ser. Khim., 1998, 1933 [Russ. Chem. Bull., 1998,47, 1879 (Engl. Transl.)].Google Scholar
  4. 4.
    T. Hill,J. Chem. Phys., 1949,17, 520.CrossRefGoogle Scholar
  5. 5.
    G. I. Berezin and A. V. Kiselev,Zh. Fiz. Khim., 1966,40, 1702 [Russ. J. Phys. Chem., 1966,40 (Engl. Transl.)].Google Scholar
  6. 6.
    G. I. Berezin,Dokl. Akad. Nauk SSSR, 1974,217, 843 [Dokl. Chem., 1974,217, 847 (Engl. Transl.)].Google Scholar
  7. 7.
    N. B. Vargaftik,Spravochnik po teplofizicheskim svoistvam gazov i zhidkostei [Reference Book on Thermophysical Properties of Gases and Liquids], Nauka, Moscow, 1972, 720 pp. (in Russian).Google Scholar
  8. 8.
    G. I. Berezin,Zh. Fiz. Khim., 1991,65, 853 [Russ. J. Phys. Chem., 1991,65 (Engl. Transl.)].Google Scholar
  9. 9.
    R. Sh. Vartapetyan and A. M. Voloshchuk,Usp. Khim., 1995,64, 1055 [Russ. Chem. Rev., 1995,64, No. 11 (Engl. Transl.)].Google Scholar
  10. 10.
    S. J. Gregg and K. S. W. Sing,Adsorption, Surface Area and Porosity, 2nd Ed., Academic Press, London.Google Scholar
  11. 11.
    N. N. Avgul and A. V. Kiselev,Chem. and Phys. of Carbon, 1970,6, 1.Google Scholar
  12. 12.
    A. A. Isirikyan and A. V. Kiselev,J. Phys. Chem., 1961,65, 601.Google Scholar
  13. 13.
    G. I. Berezin,Zh. Fiz. Khim., 1998,72, 576 [Russ. J. Phys. Chem., 1998,72 (Engl. Transl.)].Google Scholar

Copyright information

© Kluwer Academic/Plenum Publishers 1999

Authors and Affiliations

  • G. I. Berezin
    • 1
  1. 1.Institute of Physical ChemistryRussian Academy of SciencesMoscowRussian Federation

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