Tuning porosity in macroscopic monolithic metal-organic frameworks for exceptional natural gas storage

Connolly, B.M., Aragones-Anglad, M., Gandara-Loe, J. , Danaf, N.A., Lamb, D.C., Mehta, J.P., Vulpe, D., Wuttke, S., Silvestre-Albero, J., Moghadam, P.Z., Wheatleya, A.E.H. and Fairen-Jimenezb, D. Tuning porosity in macroscopic monolithic metal-organic frameworks for exceptional natural gas storage. Nature Communications, 10 (2345). ISSN 2041-1723

Full content URL: https://doi.org/10.1038/s41467-019-10185-1

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Widespread access to greener energy is required in order to mitigate the effects of climate change. A significant barrier to cleaner natural gas usage lies in the safety/efficiency limitations of storage technology. Despite highly porous metal-organic frameworks (MOFs) demonstrating record-breaking gas-storage capacities, their conventionally powdered morphology renders them non-viable. Traditional powder shaping utilising high pressure or chemical binders collapses porosity or creates low-density structures with reduced volumetric adsorption capacity. Here, we report the engineering of one of the most stable MOFs, Zr-UiO-66, without applying pressure or binders. The process yields centimetre-sized monoliths, displaying high microporosity and bulk density. We report the inclusion of variable, narrow mesopore volumes to the monoliths’ macrostructure and use this to optimise the pore-size distribution for gas uptake. The optimised mixed meso/microporous monoliths demonstrate Type II adsorption isotherms to achieve benchmark volumetric working capacities for methane and carbon dioxide. This represents a critical advance in the design of air-stable, conformed MOFs for commercial gas storage.

Subjects:F Physical Sciences > F100 Chemistry
Divisions:College of Science > School of Chemistry
ID Code:40055
Deposited On:04 Feb 2020 11:21

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