The use of Neapolitan yellow tuff (NYT), a phillipsite/chabazite-containing volcaniclastic rock, rich in phillipsite, is proposed for an inexpensive dehydration process of ethanol vapours. NYT selective water adsorption kinetics was investigated both in a continuous microbalance apparatus and in laboratory-scale fixed-bed columns. The influence of operational parameters such as tuff grain dimensions, column temperature and pressure, volumetric flow-rate and partial pressure of adsorbates was studied. A preliminary study on the fluid dynamics of the column is also described. Finally, evidence is reported that a partial, but economical bed regeneration can be attained at the column working temperature by simply flushing the system with dry nitrogen.
Selective water adsorption from aqueous ethanol containing vapours by phillipsite rich volcanic tuffs
CANTARELLA, Maria;GALLIFUOCO A.
1994-01-01
Abstract
The use of Neapolitan yellow tuff (NYT), a phillipsite/chabazite-containing volcaniclastic rock, rich in phillipsite, is proposed for an inexpensive dehydration process of ethanol vapours. NYT selective water adsorption kinetics was investigated both in a continuous microbalance apparatus and in laboratory-scale fixed-bed columns. The influence of operational parameters such as tuff grain dimensions, column temperature and pressure, volumetric flow-rate and partial pressure of adsorbates was studied. A preliminary study on the fluid dynamics of the column is also described. Finally, evidence is reported that a partial, but economical bed regeneration can be attained at the column working temperature by simply flushing the system with dry nitrogen.Pubblicazioni consigliate
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