Selective adsorption of CO2 in TAMOF-1 for the separation of CO2/CH4 gas mixtures

Santiago Capelo-Avilés, Mabel Fez-Febré, Salvador R. G. Balestra, Juanjo Cabezas-Giménez, Raiana Tomazini de Oliveira, Irene I. Gallo Stampino, Anton Vidal-Ferran, Jesús González-Cobos, Vanesa Lillo, Oscar Fabelo, Eduardo C. Escudero-Adán, Larry R. Falvello, José B. Parra, Paolo Rumori, Gemma Turnes Palomino, Carlos Palomino Cabello, Stefano Giancola (), Sofia Calero () and José Ramón Galán-Mascarós ()
Additional contact information
Santiago Capelo-Avilés: The Barcelona Institut of Science and Technology (BIST)
Mabel Fez-Febré: The Barcelona Institut of Science and Technology (BIST)
Salvador R. G. Balestra: Universidad de Sevilla
Juanjo Cabezas-Giménez: The Barcelona Institut of Science and Technology (BIST)
Raiana Tomazini de Oliveira: The Barcelona Institut of Science and Technology (BIST)
Irene I. Gallo Stampino: The Barcelona Institut of Science and Technology (BIST)
Anton Vidal-Ferran: 23
Jesús González-Cobos: The Barcelona Institut of Science and Technology (BIST)
Vanesa Lillo: The Barcelona Institut of Science and Technology (BIST)
Oscar Fabelo: 71 Avenue des Martyrs
Eduardo C. Escudero-Adán: The Barcelona Institut of Science and Technology (BIST)
Larry R. Falvello: CSIC-Universidad de Zaragoza
José B. Parra: Francisco Pintado Fe 26
Paolo Rumori: Cra. de Valldemossa km 7.5
Gemma Turnes Palomino: Cra. de Valldemossa km 7.5
Carlos Palomino Cabello: Cra. de Valldemossa km 7.5
Stefano Giancola: Orchestra Scientific S.L. Av. Països Catalans 16
Sofia Calero: Eindhoven University of Technology
José Ramón Galán-Mascarós: The Barcelona Institut of Science and Technology (BIST)

Nature Communications, 2025, vol. 16, issue 1, 1-15

Abstract: Abstract TAMOF-1 is a robust, highly porous metal–organic framework built from Cu2+ centers linked by a L-histidine derivative. Thanks to its high porosity and homochirality, TAMOF-1 has shown interesting molecular recognition properties, being able to resolve racemic mixtures of small organic molecules in gas and liquid phases. Now, we have discovered that TAMOF-1 also offers a competitive performance as solid adsorbent for CO2 physisorption, offering promising CO2 adsorption capacity ( > 3.8 mmol g–1) and CO2/CH4 Ideal Adsorbed Solution Theory (IAST) selectivity ( > 40) at ambient conditions. Moreover, the material exhibits favorable adsorption kinetics under dynamic conditions, demonstrating good stability in high-humidity environments and minimal degradation in strongly acidic media. We have identified the key interactions of CO2 within the TAMOF-1 framework by a combination of structural (neutron diffraction), spectroscopic and theoretical analyses which conclude a dual-site adsorption mechanism with the majority of adsorbed CO2 molecules occupying the empty voids in the TAMOF-1 channels without strong, directional supramolecular interactions. This very weak dominant binding opens the possibility of a low energy regeneration process for convenient CO2 purification. These features identify TAMOF-1 as a viable solid-state adsorbent for the realization of affordable biogas upgrading.

Date: 2025
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DOI: 10.1038/s41467-025-58426-w

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