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Issue 13, 2019, Issue in Progress
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Investigating the effect of alumina shaping on the sorption properties of promising metal–organic frameworks

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Abstract

Three promising MOF candidates, UiO-66(Zr), MIL-100(Fe) and MIL-127(Fe) are shaped through granulation with a ρ-alumina binder. Subsequently, changes in the surface characteristics and adsorption performance are evaluated through adsorption microcalorimetry at 303 K with several common probes (N2, CO2, CO, CH4, C2H6, C3H8, C3H6 and C4H10), generating a detailed picture of adsorbate–adsorbent interactions. Vapour adsorption experiments with water and methanol were further used to gauge changes in hydrophobicity caused by the addition of the alumina binder. Upon shaping, a decrease in gravimetric capacity and specific surface area is observed, accompanied by an increased capacity on a volumetric basis, attributed to densification induced by the shaping process, as well as a surprising lack of pore environment changes. However, the magnitude of these effects depends on the MOF, suggesting a high dependence on material structure. Out of the three materials, MIL-127(Fe) shows the least changes in adsorption performance and is highlighted as a promising candidate for further study.

Graphical abstract: Investigating the effect of alumina shaping on the sorption properties of promising metal–organic frameworks

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Supplementary files

Article information


Submitted
21 Jan 2019
Accepted
12 Feb 2019
First published
01 Mar 2019

This article is Open Access

RSC Adv., 2019,9, 7128-7135
Article type
Paper

Investigating the effect of alumina shaping on the sorption properties of promising metal–organic frameworks

P. Iacomi, U. Lee, A. H. Valekar, J. Chang and P. L. Llewellyn, RSC Adv., 2019, 9, 7128
DOI: 10.1039/C9RA00534J

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