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Adsorption and Thermodynamic Study of Pyrogenic Alumina Properties

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Abstract

Adsorption of n-pentane, triethylamine, diethyl ether, acetonitrile and chloroform has been investigated on pyrogenic alumina (S=140 m2 g−1). The results of our studies have shown the presence of active sites on the surface of pyrogenic alumina with irreversible adsorption of electron-donating molecules and CHCl3 and the dependence of energetic surface properties on electronic structure of adsorbate, quantity of adsorbed substance and hydration degree of the surface. On the hydrated oxide surface the water molecules screen the active sites of the surface, which resulted in changing of interaction energy of adsorbent-adsorbate and decreasing the region of irreversible adsorption of organic bases and CH-acid.

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Authors and Affiliations

  1. Institute of Surface Chemistry, National Academy of Sciences of Ukraine, Prospekt Nauki 31, 03039, Kyiv, Ukraine

    G. R. Yurchenko, A. K. Matkovsky, A. P. Shimansky & A. A. Chuiko

Authors
  1. G. R. Yurchenko
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  2. A. K. Matkovsky
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  3. A. P. Shimansky
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  4. A. A. Chuiko
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Yurchenko, G.R., Matkovsky, A.K., Shimansky, A.P. et al. Adsorption and Thermodynamic Study of Pyrogenic Alumina Properties. Journal of Thermal Analysis and Calorimetry 62, 469–472 (2000). https://doi.org/10.1023/A:1010110819917

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  • DOI: https://doi.org/10.1023/A:1010110819917

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