Influence of the eluent in the MIL-53(Al) selectivity for xylene isomers separation

• Tipo: Artigo em Revista Científica Internacional
• Data: 2011

Autores

Mariana A. Moreira (Autor) Outra; João Carlos Santos (Autor) Outra; Alexandre F. P. Ferreira (Autor) FEUP; José Miguel Loureiro (Autor) FEUP; Alírio Egídio Rodrigues (Autor) FEUP

Revista

Título: Industrial & Engineering Chemistry Research

Vol. 50 Nº 12

Páginas: 7688-7695

ISSN: 0888-5885

Editora: American Chemical Society

Indexação

ISI Web of Knowledge - 28 Citações

ISI Web of Science

Scopus - 31 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Engenharia química

CORDIS: Ciências Tecnológicas > Engenharia > Engenharia química

Projetos Associados

LA 20 - Projeto Estratégico-LA 20 - 2011-2012

Outras Informações

ID Authenticus: P-002-QFG

DOI: 10.1021/ie200206n

Abstract (EN): Metal-organic framework MIL-53 (Al) pellets were tested for selective adsorption and separation of xylene isomers with the aim of studying the influence of the solvent used at bulk concentrations. In this way, a set of single and multicomponent pulse experiments to measure selectivities was conducted, with iso-octane, n-hexane, and n-heptane as eluents, at 313 K. In order to complete this study, multicomponent breakthrough experiments were also performed, under the same conditions, in the presence of these three eluents, and the obtained selectivities were compared. MIL-53(Al) presented a preference for o-xylene over m-xylene and p-xylene in all experiments. The selectivity was higher when n-heptane was the eluent. For the breakthrough experiments that used n-heptane as the eluent, selectivities of 2.1 were obtained for o-xylene over m-xylene and over p-xylene. It was possible to conclude that the choice of eluent influences the adsorption selectivity and capacity of the adsorbent. This could result, among other factors, from the adsorbent adsorbate interactions. These interactions may also occur with the eluent molecules (as an adsorbate), which influences the adsorption capacity.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8