Adsorption Equilibrium of Water Vapor on Selexsorb-CDX Commercial Activated Alumina Adsorbent

2011 ◽  
Vol 56 (5) ◽  
pp. 1762-1769 ◽  
Author(s):  
Atanas Serbezov ◽  
Joshua D. Moore ◽  
Yaqin Wu
Keyword(s):  
Water Vapor ◽  
Adsorption Equilibrium ◽  
Activated Alumina

Binary Adsorption Equilibrium of Carbon Dioxide and Water Vapor on Activated Alumina

Langmuir ◽  
2009 ◽  
Vol 25 (18) ◽  
pp. 10666-10675 ◽  
Author(s):  
Gang Li ◽  
Penny Xiao ◽  
Paul Webley
Keyword(s):  
Carbon Dioxide ◽  
Water Vapor ◽  
Adsorption Equilibrium ◽  
Binary Adsorption ◽  
Activated Alumina

Low-Grade Heat Utilization Through Ultrasound-Enhanced Desorption of Activated Alumina/Water for Thermal Energy Storage

2020 ◽  
Author(s):  
Hooman Daghooghi Mobarakeh ◽  
Keshawa Bandara ◽  
Liping Wang ◽  
Robert Wang ◽  
Patrick E. Phelan ◽  
...  
Keyword(s):  
Water Vapor ◽  
Energy Storage ◽  
Thermal Energy ◽  
Input Power ◽  
Total Power ◽  
Low Grade ◽  
Ultrasonic Power ◽  
Activated Alumina ◽  
Heat Utilization ◽  
Low Grade Heat

Abstract Sorption thermal energy storage (TES) seems to be an auspicious solution to overcome the issues of intermittent energy sources and utilization of low-grade heat. Ultrasound-assisted adsorption/desorption of water vapor on activated alumina is proposed as a means of low-grade heat utilization through TES. The effects of ultrasonic power on the storing stage (desorption of water vapor) were analyzed to optimize the desorption and overall efficiencies. To determine and justify the effectiveness of incorporating ultrasound from an energy-savings point of view, an approach of constant total (heat plus ultrasound) input power of 25 W was adopted. To measure the extent of the effectiveness of using ultrasound, ultrasonic-power-to-total power ratios of 0.2 and 0.4 were investigated and the results compared with those of no-ultrasound (heat only) at the same total power. The regeneration temperature and desorption rate were measured simultaneously to investigate the effects of ultrasonication on regeneration temperature and utilization of low-grade heat. The experimental results showed that using ultrasound facilitates the regeneration of activated alumina at both power ratios without increasing the total input power. With regard to regeneration temperature, incorporating ultrasound decreases the regeneration temperature hence justifying the utilization of low-grade heat for thermal energy purposes. In terms of overall energy recovery of the adsorption thermal storage process, a new metric is proposed to justify incorporating ultrasound and any other auxiliary energy along with low-grade heat.

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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