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Energy of the adsorption of gases and vapors on microporous adsorbents

Communication 3. Differential heats of adsorption of water on crystalline synthetic NaA zeolite

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Bulletin of the Academy of Sciences of the USSR, Division of chemical science Aims and scope

Conclusions

  1. 1.

    The differential heats of adsorption of water vapors on crystalline NaA zeolite were measured with a Tian-Calvet calorimeter, and a reconstructed adsorption apparatus with mercury seals in place of the stopcocks with grease. The results obtained are in satisfactory agreement with analogous measurements performed earlier for molded NaA zeolite.

  2. 2.

    The time of establishment of adsorption equilibrium, obtained from the thermokinetic curve, varies depending on the degree of filling of the zeolite with water. At 2.3 mmoles/g it passes through a maximum and corresponds to blockage of all of the eight-membered oxygen apertures of the zeolite, entering the large cavities, by adsorbed water molecules.

  3. 3.

    A minimum and a second maximum were detected on the thermokinetic curves. Their appearance is associated with a process of nonequilibrium adsorption and the specifics of the energy processes that occur in this case.

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Authors and Affiliations

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

    M. M. Dubinin, A. A. Isirikyan, G. U. Rakhmatkariev & V. V. Serpinskii

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  1. M. M. Dubinin
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  2. A. A. Isirikyan
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  3. G. U. Rakhmatkariev
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  4. V. V. Serpinskii
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Additional information

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1269–1276, June, 1972.

The authors would like to thank S. P. Zhdanov for providing the sample of NaA zeolite.

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Dubinin, M.M., Isirikyan, A.A., Rakhmatkariev, G.U. et al. Energy of the adsorption of gases and vapors on microporous adsorbents. Russ Chem Bull 21, 1227–1232 (1972). https://doi.org/10.1007/BF00854532

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  • DOI: https://doi.org/10.1007/BF00854532

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