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Heats of adsorption and mass transfer coefficients of alkanes in zeolites Y and ZSM-20

1989; Elsevier BV; Volume: 53; Issue: 2-3 Linguagem: Inglês

10.1016/s0166-9834(00)80026-3

1873-3867

João Pires, M. Brotas de Carvalho, F. Ramôa Ribeiro, Éric G. Derouane,

Chemical and Physical Properties in Aqueous Solutions

Abstract Heats of adsorption and mass transfer coefficients of n-hexane and 3-methylpentane in Y and ZSM-20 zeolites were estimated by combined thermogravimetric and differential scanning calorimetric measurements. The heats of adsorption (at low uptake) are higher on Y zeolite than on ZSM-20, reflecting structural differences between these zeolites. The mass transfer coefficients are also higher for Y zeolite and a cation effect seems to be detected for the 3-methylpentane molecule on the Na+ form of this zeolite.