Abstract
Adsorption-induced deformation of AR-V and AUK carbon adsorbents and NaX zeolite has been studied upon adsorption of n-С5Н12, n-С6Н18, n-С7Н16, and CO2 at temperatures of 193−423 K. It has been shown that adsorption-induced deformation is positive upon the physical adsorption of gases and vapors on the surface of a nonporous (macroporous) solid when the excess adsorption is positive. When calculating the adsorption-induced deformation in the region of the capillary-condensation filling of mesopores, the additional pressure in capillaries, which is negative (contraction of an adsorbent), must be taken into account in the case of wetting a solid surface with a liquid adsorbate. The compressibility of AUK microporous carbon adsorbent as a porous solid is almost independent of the temperature and the properties of an adsorbate, and, for adsorption of n-C5H10 and n-C7H16 hydrocarbons and CO2, it is γа = (5.6 ± 0.6) × 10−6 bar−1. The compressibility of AUK adsorbent appears to be 87% higher than that of nonporous graphite.
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Original Russian Text © A.A. Fomkin, A.V. Shkolin, A.L. Pulin, I.E. Men’shchikov, E.V. Khozina, 2018, published in Kolloidnyi Zhurnal, 2018, Vol. 80, No. 5, pp. 610–619.
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Fomkin, A.A., Shkolin, A.V., Pulin, A.L. et al. Adsorption-Induced Deformation of Adsorbents. Colloid J 80, 578–586 (2018). https://doi.org/10.1134/S1061933X18050083
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DOI: https://doi.org/10.1134/S1061933X18050083