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Author(s): Mariana A. Moreira
João C. Santos
Alexandre F. P. Ferreira
José M. Loureiro
Florence Ragon
Patricia Horcajada
Kyu-E. Shim
Young-K. Hwang
U.-Hwang Lee
Jong-S. Chang
Christian Serre
Alírio E. Rodrigues
Title: Reverse shape selectivity in the liquid-phase adsorption of xylene isomers in zirconium terephthalate MOF UiO-66
Issue Date: 2012
Abstract: Powder, agglomerates, and tablets of the microporouszirconium(IV) terephthalate metalorganic frameworkUiO-66 were evaluated for the selective adsorption andseparation of xylene isomers in the liquid phase using n-heptaneas the eluent. Pulse experiments, performed at 313 K in thepresence of n-heptane, revealed the o-xylene preference of thismaterial, which was further confirmed by binary and multicomponentbreakthrough experiments in the presence of m- andp-xylene, resulting in selectivities at 313 K of 1.8 and 2.4 withregards to m-xylene and p-xylene, respectively. Additionally,because p-xylene is the less retained isomer, UiO-66 presents aselectivity pattern that is reverse of that of the xylenes' moleculardimension with respect to shape selectivity. The shaping of the material as tablets did not significantly change its selectivity toward theo-xylene isomer or toward p-xylene, which was the less retained isomer, despite a loss in capacity. Finally, the selectivity behavior ofUiO-66 in the liquid n-heptane phase makes it a suitable material for o-xylene separation in the extract (heavy product) or p-xyleneseparation in the raffinate (light product) by simulated moving bed technology.
Subject: Engenharia química
Chemical engineering
Scientific areas: Ciências da engenharia e tecnologias::Engenharia química
Engineering and technology::Chemical engineering
Related Information: info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e Tecnologia/Programa de Financiamento Plurianual de Unidades de I&D/PEst-C/EQB/LA0020/2011/Projeto Estratégico-LA 20 - 2011-2012/LA 20
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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