Abstract
The influence of impregnation of aluminum oxide desiccants prepared by centrifugal thermal activation of hydrargillite with alkali (KОН and NaOH) and carbonate (Na2CO3 and K2СО3) solutions on the physicochemical properties of the products was studied. Impregnation with alkali solutions increases the dynamic capacity of the desiccants by a factor of 2 and more, whereas impregnation with carbonate solutions decreases the sorption characteristics of the desiccants at similar texture characteristics. Introduction of alkaline modifiers leads to a considerable decrease in the concentration of Lewis acid sites on the surface and to an increase in the concentration of strong base sites. Linear correlation was revealed between the concentration of strong base sites on the surface of the desiccants and their dynamic capacity in drying of humid air. The desiccants modified by impregnation exhibit not only high static and dynamic capacity, allowing improvement of the drying efficiency, but also considerably enhanced mechanical strength.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Dabrowski, A., Adv. Colloid Interface Sci., 2001, vol. 93, nos. 1–3, pp. 135–224.
Sircar, S., Rao, M.B., and Golden, T.C., Stud. Surf. Sci. Catal., 1999, vol. 120, pp. 395–423.
Fleming, H.L., Stud. Surf. Sci. Catal., 1999, vol. 120, pp. 561–585.
Shumyatskii, Yu.I., Promyshlennye adsorbtsionnye protsessy (Industrial Adsorption Processes), Moscow: KolosS, 2009.
Zotov, R.A., Glazyrin, A.A., Danilevich, V.V., et al., Kinet. Catal., 2012, vol. 53, no. 5, pp. 570–576.
Danilevich, V.V., Isupova, L.A., Paukshtis, E.A., and Ushakov, V.A., Kinet. Catal., 2014, vol. 55, no. 3, pp. 372–379.
Danilevich, V.V., Isupova, L.A., Danilova, I.G., et al., Russ. J. Appl. Chem., 2016, vol. 89, no. 3, pp. 341–351.
Ducreux, O., Lavigne, C., and Nedez, C., Air and gas drying with activated aluminas. http://www.axens.net.
Montanari, T., Castoldi, L., Lietti, L., and Busca, G., Appl. Catal. A: General, 2011, vol. 400, pp. 61–69.
Shkrabina, R.A., Vorob’ev, Yu.K., Moroz, E.M., et al., Kinet. Katal., 1981, vol. 22, pp. 1080–1081.
Gregg, S.J. and Sing, K.S.W., Adsorption, Surface Area, and Porosity, London: Academic, 1982, 2nd ed.
Fenelonov, V.B., Vvedenie v fizicheskuyu khimiyu formirovaniya supramolekulyarnoi struktury adsorbentov i katalizatorov (Introduction to Physical Chemistry of the Supramolecular Structure Formation in Adsorbents and Catalysts), Novosibirsk: Sib. Otdel. Ross. Akad. Nauk, 2004.
Paukshtis, E.A., Infrakrasnaya spektroskopiya v geterogennom kislotno-osnovnom katalize (Infrared Spectroscopy in Heterogeneous Acid–Base Catalysis), Novosibirsk: Nauka, 1992.
Paukshtis, E.A., Soltanov, P.I., Yurchenko, E.N., and Jiratova, K., Coll. Czech. Chem. Commun., 1982, vol. 47, p. 2044.
Digne, M., Raybaud, P., Sautet, P., et al., Phys. Chem. Chem. Phys., 2007, vol. 9, pp. 2577–2582.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Isupova, L.A., Danilova, I.G., Danilevich, V.V. et al. Enhancement of the Sorption Ability of Aluminum Oxide Desiccants by Alkaline Modification. Russ J Appl Chem 90, 1810–1818 (2017). https://doi.org/10.1134/S1070427217110131
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1070427217110131