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Adsorption equilibria of water and ethanol vapors on a zeolitized tuff from Campania (Southern Italy), containing both phillipsite and chabazite, were studied. The adsorption isotherms of both compounds on a tuff sample with a grain size ranging from 120 to 60mesh and having a total zeolite content of 40% were determined at temperatures of 20, 40, 60 and 80°C and furthermore the same isotherms were...
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,...
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