Multicomponent sorption of hexane isomers in zeolite BETA

• Type: Article in International Scientific Journal
• Date: 2007

Authors

Barcia, PS (Author) Other; Silva, JAC (Author) Other; Alírio Rodrigues (Author) FEUP

Journal

Title: AICHE Journal

Vol. 53 No. 8

Pages: 1970-1981

ISSN: 0001-1541

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 12 Citations

Scopus - 13 Citations

Other information

Authenticus ID: P-004-88T

DOI: 10.1002/aic.11233

Abstract (EN): Breakthrough curves of single, binary, ternary, and quaternary mixtures of hexane (C-6) isomers n-hexane (nHEX), 3-methylpentane (3MP), 2,3-dimethylbutane (23DMB), and 2,2-dimethylbutane (22DMB) were performed in commercial pellets of zeolite BETA (BEA structure), covering the temperature range between 423 and 523 K and partial pressures up to 30 kPa. From these data, single and multicomponent adsorption equilibrium isotherms were collected. A tri-site Langmuir model (TSL) was developed to interpret the equilibrium data based on considerations about zeolite structure, and a dynamic adsorption model was tested predicting with a good accuracy the behavior of multicomponent fixed-bed experiments. At the partial pressures studied, the sorption hierarchy in the zeolite BETA is nHEX >>> 3MP > 23DMB >> 22DMB. BEA structure demonstrates a significant selectivity between C-6 isomers, especially at low coverage, giving a good perspective regarding their separation by adsorption processes. (c) 2007 American Institute of Chemical Engineers.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12