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Theoretical and experimental study of the displacement of desorbed p-xylene from activated charcoal by superheated steam

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

Conclusions

  1. 1.

    Working at various temperatures, a study has been made of the desorption of p-xylene from activated charcoals with various types of pore structures by superheated steam. This process takes place in two stages, one rapid and the other slow, with the second determinant in fixing the degree of desorption. The degree of desorption is high in systems in which the characteristic adsorption energy, the principal micropore structure parameter, is low.

  2. 2.

    The earlier suggestion that the concentration above the charcoal is close to equilibrium, and independent of the adsorbent micropore structure, in the slow stage desorption has been confirmed experimentally.

  3. 3.

    Working from this hypothesis and the volume micropore filling theory, an expression for the degree of desorption, giving results in good agreement with experimental measurements, has been obtained. A simple approximation version of this relation can be used for calculations on thermal vapor desorption by a carrier gas stream, at various temperatures and on activated charcoals with various micropore structures.

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Authors and Affiliations

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

    M. M. Dubinin, A. I. Subbotin & L. M. Kudakova

  2. Dzerzhinskii Branch, Scientific-Research Institute for Industrial and Sanitary Gas Purification, USSR

    M. M. Dubinin, A. I. Subbotin & L. M. Kudakova

Authors
  1. M. M. Dubinin
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  2. A. I. Subbotin
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  3. L. M. Kudakova
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Additional information

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 754–758, April, 1978.

The authors would like to thank V. A. Galkin and V. N. Golubev who supplied the activated charcoals I–IV used in this work.

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Dubinin, M.M., Subbotin, A.I. & Kudakova, L.M. Theoretical and experimental study of the displacement of desorbed p-xylene from activated charcoal by superheated steam. Russ Chem Bull 27, 650–654 (1978). https://doi.org/10.1007/BF00925276

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  • DOI: https://doi.org/10.1007/BF00925276

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