Transport of n-paraffins in zeolite T

• Type: Article in International Scientific Journal
• Date: 1996

Authors

Magalhaes, FD (Author) FEUP; Laurence, RL (Author) Other; Conner, WC (Author) Other

Journal

Title: AICHE Journal

Vol. 42

Pages: 68-86

ISSN: 0001-1541

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 18 Citations

ISI Web of Science

Scopus - 24 Citations

COMPENDEX

Scientific classification

FOS: Engineering and technology > Chemical engineering

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 19