INCAPE   05401
INSTITUTO DE INVESTIGACIONES EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Unidad Ejecutora - UE
artículos
Título:
Separation of ternary hydrocarbon mixtures on Y zeolite membranes
Autor/es:
ADOLFO ÁVILA; ULISES SEDRAN
Revista:
CHEMICAL ENGINEERING JOURNAL
Editorial:
Elsevier
Referencias:
Lugar: Amsterdam; Año: 2008 vol. 146 p. 338 - 344
ISSN:
1385-8947
Resumen:
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The permeation of a mixture
of n-hexane, n-decane and toluene through a 40 μm Y zeolite tubular membrane on
a support with negligible resistance to the mass transfer at 250ºC, was modelled based on
the Maxwell-Stefan formulation and the ideal adsorbed solution theory (IAST). Individual
adsorption parameters were obtained with a batch fluidized bed reactor and
diffusion parameters were taken from the literature. The model allowed to
predict the transient fluxes and surface coverages through the membrane,
showing that the responses of the components diffusing faster (n-hexane and
n-decane) overshoot their steady-state values. The permeance predictions (10-8
mol / s m2 Pa) ranged from 1.2 to 20 for n-decane, from 0.4 to 4.2
for n-hexane and from 0.8 to 4.0 for toluene, according to the feed pressure
and composition. The permeance selectivities, defined with n-hexane as the
reference, ranged between 3 and 6 for n-decane, and between 1 and 1.8 for
toluene. It was also possible to define the association between hydrocarbon
coverage profiles in the membrane and the corresponding resulting fluxes.