Adsorption Equilibria of Water Vapor on an Alumina/Zeolite 13X Composite and Silica Gel

2017 ◽  
Vol 62 (2) ◽  
pp. 804-811 ◽  
Author(s):  
Hyun-Taek Oh ◽  
Seung-Jun Lim ◽  
Jeong Hoon Kim ◽  
Chang-Ha Lee
Keyword(s):  
Water Vapor ◽  
Silica Gel ◽  
Zeolite 13X ◽  
Adsorption Equilibria

Adsorption Equilibria of Water Vapor on Alumina, Zeolite 13X, and a Zeolite X/Activated Carbon Composite

2003 ◽  
Vol 48 (1) ◽  
pp. 137-141 ◽  
Author(s):  
Jong-Hwa Kim ◽  
Chang-Ha Lee ◽  
Woo-Sik Kim ◽  
Jong-Seok Lee ◽  
Jin-Tae Kim ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Water Vapor ◽  
Carbon Composite ◽  
Zeolite X ◽  
Zeolite 13X ◽  
Adsorption Equilibria

Adsorption Equilibria of Water Vapor on Zeolite 3A, Zeolite 13X, and Dealuminated Y Zeolite

2016 ◽  
Vol 61 (4) ◽  
pp. 1547-1554 ◽  
Author(s):  
Kyung-Min Kim ◽  
Hyun-Taek Oh ◽  
Seung-Jun Lim ◽  
Keon Ho ◽  
Yongha Park ◽  
...  
Keyword(s):  
Water Vapor ◽  
Y Zeolite ◽  
Zeolite 13X ◽  
Adsorption Equilibria

Dynamics of water vapor sorption in a CaCl2/Silica Gel/Binder bed: The effect of the bed pore structure

2006 ◽  
Vol 47 (5) ◽  
pp. 776-781 ◽  
Author(s):  
Yu. I. Aristov ◽  
I. V. Koptyug ◽  
L. G. Gordeeva ◽  
L. Yu. Il’ina ◽  
I. S. Glaznev
Keyword(s):  
Water Vapor ◽  
Pore Structure ◽  
Silica Gel ◽  
Water Vapor Sorption ◽  
Vapor Sorption

scholarly journals Desiccant Films Made of Low-Density Polyethylene with Dispersed Silica Gel—Water Vapor Absorption, Permeability (H2O, N2, O2, CO2), and Mechanical Properties

Materials ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2304 ◽  
Author(s):  
Sängerlaub ◽  
Kucukpinar ◽  
Müller
Keyword(s):  
Water Vapor ◽  
Silica Gel ◽  
Water Vapor Pressure ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Water Vapor Absorption ◽  
Vapor Permeation ◽  
Vapor Absorption ◽  
Effective Water ◽  
Water Vapor Permeation

Silica gel is a well-known desiccant. Through dispersion of silica gel in a polymer, films can be made that absorb and desorb water vapor. The water vapor absorption becomes reversible by exposing such films to a water vapor pressure below that of the water vapor pressure during absorption, or by heating the film. The intention of this study was to achieve a better understanding about the water vapor absorption, permeability (H2O, N2, O2, CO2), and mechanical properties of films with dispersed silica gel. Low-density polyethylene (PE-LD) monolayer films with a nominal silica gel concentration of 0.2, 0.4, and 0.6 g dispersed silica gel per 1 g film (PE-LD) were prepared and they absorbed up to 0.08 g water vapor per 1 g of film. The water vapor absorption as a function of time was described by using effective diffusion coefficients. The steady state (effective) water vapor permeation coefficients of the films with dispersed silica gel were a factor of 2 to 14 (8.4 to 60.2·10−12 mg·cm·(cm²·s·Pa)−1, 23 °C) higher than for pure PE-LD films (4.3·10−12 mg·cm·(cm²·s·Pa)−1, 23 °C). On the other hand, the steady state gas permeabilities for N2, O2, and CO2 were reduced to around one-third of the pure PE-LD films. An important result is that (effective) water vapor permeation coefficients calculated from results of sorption and measured by permeation experiments yielded similar values. It has been found that it is possible to describe the sorption and diffusion behavior of water by knowing the permeability coefficient and the sorption capacity of the film (Peff.≈Seff.·Deff.). The tensile stress changed only slightly (values between 10 and 14 N mm−²), while the tensile strain at break was reduced with higher nominal silica gel concentration from 318 length-% (pure PE-LD film) to 5 length-% (PE-LD with 0.6 g dispersed silica gel per 1 g film).

THE SORPTION OF VAPORS BY ACTIVE SILICA

1935 ◽  
Vol 12 (1) ◽  
pp. 41-56 ◽  
Author(s):  
L. M. Pidgeon
Keyword(s):  
Water Vapor ◽  
Silica Gel ◽  
Dynamic Method ◽  
Activated Alumina ◽  
Simple Method ◽  
Commercial Alumina ◽  
Method Of Production ◽  
Effective Sorbent ◽  
Better Than

The sorptive properties of a new active silica have been examined. This sorbent is prepared by the action of acids on the mineral serpentine. The quartz spiral sorption balance has been employed to obtain isotherms for water, benzene and alcohol. Relative rates of sorption have been measured and compared with those for silica gel.Efficiency measurements have also been made, using the dynamic method, with water vapor as the sorbate. Comparative measurements have been carried out on commercial silica gel, and data are cited from the literature for activated alumina. A comparison of the data indicates that active silica is inferior to silica gel but somewhat better than commercial alumina. Its simple method of production combined with reasonably good sorptive properties should result in a cheap and effective sorbent for technical purposes.The type of isotherm exhibited by active silica is similar to that associated with the "chalky" gels described by Holmes. Certain theoretical aspects of sorption by "chalky" and "vitreous" gels are discussed.

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