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Adsorption of a liquid on a microporous adsorbent along the liquid-vapor equilibrium line. Communication 2. Average density of adsorbed substances in a microporous adsorbent

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

Conclusions

  1. 1.

    The average densities of adsorbates at p=ps in the pores of zeolites and the temperature dependences of the adsorption values were determined for the previously studied argon, krypton, xenon-NaX zeolite, CO2-NaX, and trifluorochloromethane-NaX systems and for the newly studied H2O-NaA zeolite and ethanol-NaX zeolite systems.

  2. 2.

    The values of the average densities and their temperature coefficients were compared with the values calculated with the Dubinin-Nikolaev and Basmadjian-Cook methods. It was shown that there are significant differences between the measured and calculated values.

  3. 3.

    It was shown that the value of the average densities of the adsorbates and their thermal expansion coefficients differ significantly from the corresponding values for normal bulk liquid phases.

  4. 4.

    It was found that for all nonpolar adsorbates, there is a temperature at which the densities of the ads.orbate and the corresponding liquid are equal. This point, expressed in a reduced temperature scale (τ=T/Tcr), is equal to 0.88 ± 0.04.

  5. 5.

    The average density of water adsorbed by zeolite at all temperatures is greater than the density of liquid water.

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Authors and Affiliations

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

    I. I. Seliverstova, A. A. Fomkin & V. V. Serpinskii

Authors
  1. I. I. Seliverstova
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  2. A. A. Fomkin
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  3. V. V. Serpinskii
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Additional information

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1231–1236, June, 1986.

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Seliverstova, I.I., Fomkin, A.A. & Serpinskii, V.V. Adsorption of a liquid on a microporous adsorbent along the liquid-vapor equilibrium line. Communication 2. Average density of adsorbed substances in a microporous adsorbent. Russ Chem Bull 35, 1116–1120 (1986). https://doi.org/10.1007/BF00956577

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  • DOI: https://doi.org/10.1007/BF00956577

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