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Influence of the temperature of calcination of bayerite-containing aluminum hydroxide pellets on the water vapor adsorption capacity and acid-base properties of alumina

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The paper considers the influence of the temperature of calcination (350–550°C) of alumina-based water adsorbents prepared from bayerite-containing aluminum hydroxide on the static water sorption capacity at high and low relative air humidities and on the acid-base properties of the surface. The acid-base properties of aluminas have been determined by means of IR spectroscopy of adsorbed CO probe molecule (Lewis sites) and by the spin probe method, which was used to determine the concentrations of electron acceptor and electron donor sites. It has been demonstrated that, at a high relative air humidity (60%), there is no correlation between the static capacity of the drier and its acid-base properties, while at low relative humidities (1–1.5%), an increase in the concentration of electron donor sites and a decrease in the concentration of electron donor and Lewis acid sites enhance the water sorption capacity of alumina.

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Correspondence to L. A. Isupova.

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Original Russian Text © R.A. Zotov, A.A. Glazyrin, V.V. Danilevich, I.V. Kharina, D.A. Zyuzin, A.M. Volodin, L.A. Isupova, 2012, published in Kinetika i Kataliz, 2012, Vol. 53, No. 5, pp. 599–606.

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Zotov, R.A., Glazyrin, A.A., Danilevich, V.V. et al. Influence of the temperature of calcination of bayerite-containing aluminum hydroxide pellets on the water vapor adsorption capacity and acid-base properties of alumina. Kinet Catal 53, 570–576 (2012). https://doi.org/10.1134/S0023158412050187

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  • DOI: https://doi.org/10.1134/S0023158412050187

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