Kinetic Aspects of the Adsorption on Aluminum Oxide Drying Agents Doped with Alkali Metal Ions


Citar

Texto integral

Acesso aberto Acesso aberto
Acesso é fechado Acesso está concedido
Acesso é fechado Somente assinantes

Resumo

Fundamental dynamic (kinetic) aspects of the process in which water vapor interacts with the surface of drying agents that are synthesized on the basis of low-temperature modification of aluminum oxide produced from a pseudoboehmite-containing hydroxide and are modified (doped) with alkali atoms (K, Na). It is shown that the kinetics of adsorption on the samples under study, formed from the fine fraction (0.5–1.0 mm) of aluminum oxide adsorbents, can be described with the Glueckauf equation, which rather well describes the dynamics of water vapor absorption in the course of time. The equation parameters were determined: adsorption rate constants and the equilibrium adsorption capacities (a*). It was found that the alkaline modification of the surface of aluminum oxide adsorbents results in that a* increases (by ~40%) as compared with the unmodified drying agent. A correlation is observed between the equilibrium adsorption capacity of the samples under study and the acid-base properties of the surface.

Sobre autores

S. Reshetnikov

Tomsk State University

Autor responsável pela correspondência
Email: reshet@catalysis.ru
Rússia, pr. Lenina 36, Tomsk, 634050

A. Livanova

Tomsk State University

Email: reshet@catalysis.ru
Rússia, pr. Lenina 36, Tomsk, 634050

E. Meshcheryakov

Tomsk State University

Email: reshet@catalysis.ru
Rússia, pr. Lenina 36, Tomsk, 634050

I. Kurzina

Tomsk State University

Email: reshet@catalysis.ru
Rússia, pr. Lenina 36, Tomsk, 634050

L. Isupova

Boreskov Institute of Catalysis

Email: reshet@catalysis.ru
Rússia, pr. Akademika Lavrent’eva 5, Novosibirsk, 630090

Arquivos suplementares

Arquivos suplementares
Ação
1. JATS XML

Declaração de direitos autorais © Pleiades Publishing, Ltd., 2017