Adsorption Equilibrium of Water Vapor on F-200 Activated Alumina

Abstract

Adsorption isotherm data for water vapor on F-200 7 × 14 Tyler mesh activated alumina are obtained at (5, 15, 25, and 35) °C in the range 0% to approximately 95% relative humidity using a static gravimetric technique. F-200 is a commercially available adsorbent that has become very popular in industry for drying compressed air via pressure or temperature swing adsorption. The equilibrium isotherms are presented in tabular as well as in graphical form. The equilibrium data are measured in both directions: adsorption and desorption. A pronounced hysteresis between the adsorption and the desorption legs is present at all temperatures. When plotted versus the relative humidity, the equilibrium data are essentially independent of temperature. The complete removal of the adsorbed water requires regeneration at elevated temperature (290 °C) under vacuum. The data reported in this study can be used in industrial design as well as in the theoretical studies on the adsorption/desorption mechanisms of water vapor on activated alumina.

Correlation of Adsorption Equilibrium Data for Water Vapor on F-200 Activated Alumina

“…The design of PSA units is often facilitated by the use of dynamic adsorber models (Serbezov andSotirchos, 1997, 1999). These models require information for the adsorption equilibrium in the form of an adsorption isotherm equation that calculates the equilibrium loading at given temperature and pressure.…”

A comprehensive description of water vapor equilibriums on alumina F-200: Adsorption, desorption, and H2O/CO2 binary adsorption

“…The experimental desorption data obtained by Serbezov [19] indicates that irreversible chemical adsorption occurs because some amount of the adsorbed water remains at the end of desorption (Fig. 3).…”

“…The F-G equation is used to fit the water adsorption data on the alumina F-200 measured by Serbezov [19]. The experimental data of water vapor adsorption and desorption on alumina F-200 at four different temperatures are obtained by using the static gravimetric technique.…”

“…H 2 O/CO 2 binary adsorption isotherm equations are obtained by combining the F-G equation for water vapor and the Freundlich equation for CO 2 . The experimental data of Serbezov [19] for water vapor adsorption and desorption based on alumina F-200 are used to verify the proposed equations. The prediction results show that the F-G equation and derived equations properly describe water vapor equilibriums on alumina F-200.…”

The role of water on postcombustion CO2 capture by vacuum swing adsorption: Bed layering and purge to feed ratio

“…Owning to the large enthalpy changes of the heavy components, one can readily use thermal profiles to infer H 2 O and CO 2 mass transfer fronts. Herein, we chose activated alumina CDX and F200, respectively, as the prelayers because of their wide application in adsorption based driers …”