Abstract
The binary adsorption of water and ethanol from their gaseous mixture was studied at atmospheric pressure and two different temperatures, viz. 348 K and 423 K, in a flow-type fixed-bed adsorber. The adsorbents were NaX, NaY, and NaY progressively dealuminated by the SiCl4 method of Beyer and Belenykaja. A Si/Al ratio from 1.5 to 21 was covered. Both an increasing Si/Al ratio and increasing adsorption temperature make a faujasite adsorbent more hydrophobic. With increasing Si/Al ratio, the equilibrium loading of water decreases monotonously, while that of ethanol passes through a maximum. Its position shifts to lower Si/Al ratios as the temperature is raised
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