Granular Lipari pumice has been transformed into a mixed-phase product with a layered structure of zeolites by treatment in hot alkaline solution. The phase distribution (hydroxysodalite, faujasite and zeolite pc) is a function of the Na+/SiO2/Al2O3 ratio and of the diffusion rate of caustic so da into the macropores of the rhyolitic volcanic glass. Phase transformation proceeds in the order pumice → hydroxysodalite → faujasite → zeolite Pc. The granular products can eventually be used as adsorber or industrial catalyst in fixed bed reactors.
Liquid-solid interaction in granular Lipari pumice
CAVALLARO, Stefano;OTTANA', Rosaria;BART, Joannes Christian
1983-01-01
Abstract
Granular Lipari pumice has been transformed into a mixed-phase product with a layered structure of zeolites by treatment in hot alkaline solution. The phase distribution (hydroxysodalite, faujasite and zeolite pc) is a function of the Na+/SiO2/Al2O3 ratio and of the diffusion rate of caustic so da into the macropores of the rhyolitic volcanic glass. Phase transformation proceeds in the order pumice → hydroxysodalite → faujasite → zeolite Pc. The granular products can eventually be used as adsorber or industrial catalyst in fixed bed reactors.File in questo prodotto:
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