Multicomponent sorption of hexane isomers in zeolite BETA

• Tipo: Artigo em Revista Científica Internacional
• Data: 2007

Autores

Barcia, PS (Autor) Outra; Silva, JAC (Autor) Outra; Alírio Rodrigues (Autor) FEUP

Revista

Título: AICHE Journal

Vol. 53 Nº 8

Páginas: 1970-1981

ISSN: 0001-1541

Editora: Wiley-Blackwell

Indexação

ISI Web of Knowledge - 12 Citações

Scopus - 13 Citações

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 12