Toward Understanding the Influence of Ethylbenzene in p-Xylene Selectivity of the Porous Titanium Amino Terephthalate MIL-125(Ti): Adsorption Equilibrium and Separation of Xylene Isomers

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

Mariana A. Moreira (Autor) Outra; João C. Santos (Autor) Outra; Alexandre F. P. Ferreira (Autor) FEUP; José M. Loureiro (Autor) FEUP; Florence Ragon (Autor) Outra; Patricia Horcajada (Autor) Outra; Pascal G. Yot (Autor) Outra; Christian Serre (Autor) Outra; Alírio E. Rodrigues (Autor) FEUP

Revista

Título: Langmuir

Vol. 28 Nº 7

Páginas: 3494-3502

ISSN: 0743-7463

Editora: American Chemical Society

Indexação

ISI Web of Knowledge - 32 Citações

Scopus - 42 Citações

Projetos Associados

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

Outras Informações

ID Authenticus: P-002-CZ9

DOI: 10.1021/la204969t

Abstract (EN): The potential of the porous crystalline titanium dicarboxylate MIL-125(Ti) in powder form was studied for the separation in liquid phase of xylene isomers and ethylbenzene (MIL stands for Materials from Institut Lavoisier). We report here a detailed experimental study consisting of binary and multi-component adsorption equilibrium of xylene isomers in MIL-125(TO powder at low (<= 0.8 M) and bulk (>= 0.8 M) concentrations. A series of multi-component breakthrough experiments was first performed using n-heptane as the eluent at 313 K, and the obtained selectivities were compared, followed by binary breakthrough experiments to determine the adsorption isotherms at 313 K, using n-heptane as the eluent. MIL-125(Ti) is a para-selective material suitable at low concentrations to separate p-xylene from the other xylene isomers. Pulse experiments indicate a separation factor of 1.3 for p-xylene over o-xylene and m-xylene, while breakthrough experiments using a diluted ternary mixture lead to selectivity values of 1.5 and 1.6 for p-xylene over m-xylene and o-xylene, respectively. Introduction of ethylbenzene in the mixture results however in a decrease of the selectivity.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9