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Influence of the Composition, Structure, and Physical and Chemical Properties of Aluminium-Oxide-Based Sorbents on Water Adsorption Ability

1
Salavat Catalyst Plant, Salavat 453256, Republic of Bashkortostan, Russia
2
Faculty of Chemistry, National Research Tomsk State University, Tomsk 634050, Russia
3
Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090, Russia
*
Author to whom correspondence should be addressed.
Materials 2018, 11(1), 132; https://doi.org/10.3390/ma11010132
Received: 29 November 2017 / Revised: 24 December 2017 / Accepted: 9 January 2018 / Published: 14 January 2018
Interaction between the water adsorption ability of aluminium-oxide-based sorbents and their chemical composition, acid-base properties of the surface, and textural characteristics has been analysed. Alumina desiccants were synthesized with the centrifugal–thermal activation of gibbsite followed by the hydration of the gibbsite under mild conditions. It was demonstrated that the multicyclic adsorption regeneration of samples under realistic conditions results in structural transformations and changes in the acidity of their surfaces and water adsorption ability. The modification of pseudoboehmite with alkali ions increases surface basicity and the dynamic capacity of adsorbents relating to water vapours. Equations have been presented that describe the adsorption and desorption processes taking place during water vapour adsorption with the materials studied. View Full-Text
Keywords: aluminium oxide; acid-base properties; kinetics; water adsorption aluminium oxide; acid-base properties; kinetics; water adsorption
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Zotov, R.; Meshcheryakov, E.; Livanova, A.; Minakova, T.; Magaev, O.; Isupova, L.; Kurzina, I. Influence of the Composition, Structure, and Physical and Chemical Properties of Aluminium-Oxide-Based Sorbents on Water Adsorption Ability. Materials 2018, 11, 132.

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