467595 CO2, N2 and CH4 Adsorption into Novel MOF/Graphene-like Composites

Tuesday, November 15, 2016
Grand Ballroom B (Hilton San Francisco Union Square)
Matteo Minelli, Department of Civil, Chemical, Environmental and Materials Engineering, University of Bologna, Bologna, Italy, Michela Alfè, Istituto di Ricerche sulla Combustione-, CNR, Napoli, Italy, Valentina Gargiulo, Istituto di Ricerche sulla Combustione, CNR, Napoli, Italy and Maria Grazia De Angelis, DICAM, University of Bologna, Bologna, Italy; Consorzio interuniversitario nazionale per la scienza e tecnologia dei materiali, INSTM, Firenze, Italy

In this work we measured, with a pressure decay technique, the adsorption in static conditions of different gases (N2, CH4, CO2) in novel types of metal organic frameworks (MOFs) selective to CO2, modified with different strategies, for CO2 capture processes in post and precombustion as well as natural gas upgrading.

The starting MOF material is HKUST-1 or Cu3(BTC)2, which shows high adsorption and selectivity for CO2. Starting from this structure, we evaluated the effect of intercalation, in the assembling stage, of carbonaceous graphene-like layers (GL) that induce modifications to the structure and porosity distribution, generating the so-called hybrid MOF-GL materials (MGLs).[1] We also investigated the effect of the partial replacement of Copper centers with Zinc centers (ZnMOFs), and of the simultaneous presence of Zinc centers and of graphene like layers (ZnMGLs). The different materials show rather different gas adsoprtion properties, that depend on the chemical structure and on the material porosity. In particular, the samples with the highest adsorption capacity in comparison to HKUST-1 are the MGL ones, while the samples ZnMOF and ZnMGL have a lower CO2 uptake. The majority of adsorption isotherms shows a type I behaviour.


[1] M. Alfè, V. Gargiulo, L. Lisi, R. Di Capua, Synthesis and characterization of conductive copper metal-organic framework/graphene-like composites, Materials Chemistry and Physics 147 (2014) 744-750

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