Transport of n-paraffins in zeolite T

• Tipo: Artigo em Revista Científica Internacional
• Data: 1996

Autores

Magalhaes, FD (Autor) FEUP; Laurence, RL (Autor) Outra; Conner, WC (Autor) Outra

Revista

Título: AICHE Journal

Vol. 42

Páginas: 68-86

ISSN: 0001-1541

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 18 Citações

ISI Web of Science

Scopus - 24 Citações

COMPENDEX

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

Outras Informações

ID Authenticus: P-008-NTF

DOI: 10.1002/aic.690420108

Abstract (EN): Mass transport of n-heptane, n-nonane, and n-dodecane in zeolite T was studied using a gravimetric uptake technique. The sigmoidal shape of the uptake curves indicated the existence of a nondiffusional resistance in the transport process. To compute the transport parameters, an approach based on the temporal moments of the uptake curves was developed. A model involving an external resistance dependent on the local slope of the sorption isotherm best represented the data. No evidence of the ''window effect'' reported by Gorring was found. The measured diffusivities decrease with chain length, while the activation energies remain essentially constant. Both resistances (diffusional and nondiffusional) depend strongly on lattice loading, and their relative contributions for the transport time change as saturation is approached.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 19