(338f) Experimental Measurement On Binary Chlorinated Hydrocarbon Component to FAU Type High Silica Zeolite
AIChE Annual Meeting
2009
2009 Annual Meeting
Separations Division
Poster Session On Fundamentals and Applications of Adsorption and Ion Exchange
Tuesday, November 10, 2009 - 6:00pm to 8:00pm
Abstract
Keyword: azeotropic adsorption, breakthrough curves, gravimetric method
In recent years, instead of the chlorofluorocarbon specified as the ozone-depleting substance, a chlorinated organic compound, hydrocarbon, alcohol, etc. are used as an alternative washing solvent, and they are used as a mixed solvent in many cases. Therefore, adsorption operation of binary systems is needed. Furthermore, since azeotropic may happen, in the case of the design of a solvent recovery system and operation, those adsorption equilibrium are required as basic data. This study considered the adsorption equilibrium relation used as basic data required in order to adsorb various binary mixture solvent vapor by high silica zeolite (HSZ).
The adsorbate used was ethanol and trichloroethylene which are the system of azeotropic mixture. The Experiments were carried out using a flow method, changing the total concentration of ethanol and trichloroethylene and composition. By this system, one azeotropic point appeared and three kinds of breakthrough curves were obtained by the difference in composition.
Moreover, it experimented by the gravimetric method. The adsorbate used also was ethanol and trichloroethylene. In the gravimetric method, the adsorption isotherm of binary systems was obtained. The result of the single element experiment was able to reproduce the result of the flow method. By this system, azeotropic phenomenon was obtained all concentration by adsorption isotherms.
Binary adsorption equilibria for the system of EtOH-TCE of several total concentration are shown in Fig.1 and Fig.2 in form of X-Y diagram (X and Y are the mole fractions of gas phase concentration and the amount adsorbed at equilibrium, respectively).
Fig.1 Comparison of adsorption equilibrium for experimental concentration
(Fixed-bed adsorption experiment)
Fig.2 Comparison of adsorption equilibrium for experimental concentration
(Gravimetric method)
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