Abstract
The isotherms of excess adsorption of argon, nitrogen, and carbon dioxide on adsorbents with various porous structures (active carbon AU-71, polymeric sorbent MN-200, and synthetic zeolite NaA) were measured on the precision volumetric-gravimetric device in the pressure range of 0.1—150 MPa and at temperatures 300—400 K. The results of determination of the adsorption volumes of the studied adsorbents were compared using two methods. The first method is based on the Dubinin-Radushkevich equation, whereas the second one involves a conditional division of the weight of the substance in an ampule into the adsorbed portion and the part existing in the gas phase. The behavior of the adsorbed substance is described by the equation of adsorption of complete content corresponding to the physics of the adsorption process. The relation of the parameters of the empirical Dubinin—Radushkevich equation to the energy characteristics of the system was established.
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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 707-712, April, 2009.
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Pribylov, A.A., Larionov, O.G., Shekhovtsova, L.G. et al. Adsorption of gases on adsorbents of various nature and porous structure at high pressures. Russ Chem Bull 58, 722–728 (2009). https://doi.org/10.1007/s11172-009-0084-5
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DOI: https://doi.org/10.1007/s11172-009-0084-5