INCAPE   05401
INSTITUTO DE INVESTIGACIONES EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Unidad Ejecutora - UE
artículos
Título:
Multi-component transport of hydrocarbons in FCC catalysts
Autor/es:
ADOLFO ÁVILA; CLAUDIA M. BIDABEHERE; ULISES SEDRAN
Revista:
INDUSTRIAL & ENGINEERING CHEMICAL RESEARCH
Editorial:
ACS
Referencias:
Lugar: Washington; Año: 2007 vol. 46 p. 7927 - 7935
ISSN:
0888-5885
Resumen:
Adsorption experiments with up to 10 s contact time in a batch adsorber
with a ternary mixture of hexane, decane and toluene at 250ºC and a binary
mixture of hexane and 1-hexene at 160 ºC were used to assess equilibrium and apparent adsorption
selectivities and diffusion selectivities in an equilibrium commercial FCC
catalyst; and confirm the predictions of a
zeolite diffusion adsorption model based on the Maxwell Stefan formulation
in combination with an isotherm according to the ideal adsorbed solution theory
IAST. Hexane was the reference hydrocarbon, and the decane and toluene apparent
selectivities observed in the mixture were higher than those of the individual
cases. The predictions of the apparent adsorption selectivities were close to
the experimental values and higher than those for diluted conditions. The
stronger adsorption of decane and the interactions between the various species
within the zeolite particles contributed positively to decane overall transport
in comparison to the other hydrocarbons in the mixture. Such interaction
effects can be clearly visualized in the simulation of the transient adsorbate
concentration profiles inside the zeolite particles. A similar behavior was
observed in the case of the olefin in the hexane/hexene mixture.