Open AccessComparative assessment of characteristics of industrial and laboratory highly-efficient samples of adsorbents-desiccants
Author(s) -
A. V. Livanova,
Mariya P. Sandu,
Ж. Б. Будаев,
E. P. Meshcheryakov
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/696/1/012007
Subject(s) - desiccant , adsorption , aluminum oxide , chemistry , oxide , chemical engineering , mass transfer , aluminium , materials science , chromatography , organic chemistry , engineering
The research results of the physicochemical characteristics, adsorption kinetics and the value of adsorptive capacity, with reference to water vapors, of industrial adsorbents-desiccants Alumac 2-5H, Alusorb 675 and experimental samples based on aluminum oxide, obtained by centrifugal thermal activation of hydrargillite with its subsequent hydration in mild conditions, are presented. It is demonstrated that modification by sodium cations during synthesis at the hydration stage or impregnation with hygroscopic salt (CaCl 2 ) of the granules of synthesized aluminum oxide adsorbent allows obtaining desiccants with a higher value of dynamic capacity with respect to water vapors as compared to industrial adsorbents. The most balanced set of characteristics belongs to the aluminum oxide sample containing 0.6 % mass. of sodium, for which static capacity by water is higher than 20 g/100 g; the dynamic capacity value is at a level of 6.9 g/100 cm 3 , and the mechanical strength is 8.4 MPa.