Utilize este identificador para referenciar este registo:
https://hdl.handle.net/10216/106817
Autor(es): | Patrícia A. P. Mendes Alírio E. Rodrigues Patricia Horcajada Jarode Eubank Thomas Devic Christian Serre José A. C. Silva |
Título: | Separation of Hexane Isomers on Rigid Porous Metal Carboxylate-Based Metal-Organic Frameworks |
Data de publicação: | 2014 |
Resumo: | Screening separation studies with equimolar quaternary mixtures of hexane isomers, namely, n-hexane/3-methylpentane/2,3-dimethylbutane/2,2-dimethylbutane (n-HEX/3MP/23DMB/22DMB), in the temperature range of 343-423 K and partial pressures up to 10 kPa have been performed using three rigid porous metal (III/IV) carboxylate-based metal organic frameworks (MOFs) with different composition and topology. These carboxylate-based MOFs are denoted as MIL-100(Cr), MIL-125(Ti)-NH2 and MIL-127(Fe). Adsorption study results revealed that all the isomers were adsorbed on MIL-100(Cr) and MIL-125(Ti)-NH2, with adsorption amounts reaching 24 and 12 wt%, respectively, and the order of adsorption being similar to the normal boiling point of the compounds, that is, n-HEX > 3MP > 23DMB > 22DMB, with selectivity of adsorption never exceeding three (i.e. selectivities between the extreme compounds n-HEX and 22DMB). It is worth noting that adsorption of branched isomers is practically excluded on MIL-127(Fe), which exhibits a strong molecular sieve effect of the adsorbed n-HEX with the loading capacity reaching a maximum of 7 wt%. Finally, an alternative strategy, which involved probing the effect of post-synthetic functionalization on the coordinatively unsaturated metal sites of the MIL-100(Cr) using functional group ethylamine or N-methylethylenediamine showed no significant differences in terms of separation. |
URI: | https://hdl.handle.net/10216/106817 |
Informação Relacionada: | info:eu-repo/grantAgreement/FCT - Fundação para a Ciência e a Tecnologia/Projetos Estratégicos/PEst-C/EQB/LA0020/2013/PROJECTO ESTRATÉGICO - LA 20 - 2013-2014/LA 20 |
Tipo de Documento: | Artigo em Revista Científica Internacional |
Condições de Acesso: | restrictedAccess |
Aparece nas coleções: | FEUP - Artigo em Revista Científica Internacional |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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206104.pdf Restricted Access | 4.08 MB | Adobe PDF | Request a copy from the Author(s) |
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