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Temperature dependence of adsorption

1. General rules for the adsorption of individual substances

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

Conclusions

  1. 1.

    A thermodynatnic analysis of the temperature dependence of adsorption of individual substances has been carried out.

  2. 2.

    The idea of isoergs, i.e., lines of constant value of free enthalpy of adsorption, has been introduced.

  3. 3.

    The ratio of the differential entropy of adsorption, reckoned from the level of entropy of the liquid, to the thermal coefficient of adsorption is greater than zero along any isoerg.

  4. 4.

    In In p vsa coordinates, the abscissa of the inflection point αi of an absorption isotherm is independent of temperature, and the ordinate of the inflection point, In pi, is a linear function of reciprocal temperature. One isotherm is sufficient for finding the parameters of this function.

  5. 5.

    A thermal adsorption equation is proposed, all parameters of which can be determined from one adsorption isotherm. The equation describes adsorption equilibria well in a very wide interval of pressures, temperatures, and surface converages.

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Literature cited

  1. A. A. Fomkin, V. V. Serpinskii, and B. P. Bering, Izv. Akad. Nauk SSSR, Ser. Khim.,1975, 1244.

  2. I. I. Seliverstova, A. A. Fomkin, and V. V. Serpinskii, Izv. Akad. Nauk SSSR, Ser. Khim.,1978, 201.

  3. M. Kh. Karapet'yants, Chemical Thermodynamics [in Russian], Khimiya, 3rd ed. (1975) p. 188.

  4. T. S. Yakubov, Dissertation, Moscow (1979).

  5. T. L. Hill, J. Chem. Phys.,14, 441 (1946); T. L. Hill, Advances Catal.,4, 211 (1952); J. H. de Boer, The Dynamical Character of Adsorption, Oxford Univ. Press (1953).

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  6. R. H. Fowler and E. A. Guggenheim, Statistical Thermodynamics, Cambridge Univ. Press (1949).

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Authors and Affiliations

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

    O. N. Kabanova, V. V. Serpinskii & T. S. Yakubov

Authors
  1. O. N. Kabanova
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  2. V. V. Serpinskii
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  3. T. S. Yakubov
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Additional information

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 759–765, April, 1980.

The authors express their deep gratitude to A. A. Fomkin for submitting tables of experimental data for the calculations.

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Kabanova, O.N., Serpinskii, V.V. & Yakubov, T.S. Temperature dependence of adsorption. Russ Chem Bull 29, 514–520 (1980). https://doi.org/10.1007/BF00961593

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  • DOI: https://doi.org/10.1007/BF00961593

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