147843 20250108101618.0 doi 10.1016/j.seppur.2024.129825 sideral 141405 ART-2025-141405 eng Yahia, Mohamed Enhancing CO2/CH4 separation performance in PIM-1 based MXene nanosheets mixed matrix membranes 2025 This study presents an approach by integrating MXene nanosheets (Ti2C3Tx) into polymer of intrinsic microporosity (PIM-1) matrix to develop mixed matrix membranes (MMMs) for biogas upgrading. Different concentrations (1–5 wt%) of MXene were incorporated into PIM-1, and the resulting materials were characterized to 1H NMR, FTIR, XRD, TGA, nitrogen adsorption, SEM and EDS to assess their physicochemical properties. The research focused on evaluating the gas separation performance, particularly CO2/CH4 separation, as well as the aging behavior of the MMMs. The incorporating of MXene nanosheets significantly enhanced the CO2 permeability and selectivity of PIM-1 by enhancing gas solubility and diffusivity. The most promising results were observed at 5 wt% filler loading, achieving a 13.5 CO2/CH4 separation selectivity at 7652 Barrer of CO2 permeability. In all membranes with aging time (60 days), there was a decrease in CO2 permeability and a slight increase in CO2/CH4 selectivity, observing that the introduction of MXene slightly mitigates the physical aging process in the PIM-1 polymer. Additionally, the permeability tests revealed higher CO2 permeability and (CO2/CH4) selectivity values for mixed gases compared to single gases. Overall, the study highlights the potential of MXene/PIM-1 MMMs as effective materials for CO2/CH4 separation, outperforming pristine PIM-1. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/AEI/CEX2023-001286-S info:eu-repo/grantAgreement/ES/DGA/T68-23R info:eu-repo/grantAgreement/ES/MICINN/PID2022-138582OB-I00 info:eu-repo/grantAgreement/EUR/MICINN/TED2021-130621B-C41 info:eu-repo/grantAgreement/ES/MINECO-AEI/PID2019-104009RB-I00-AEI-10.13039-501100011033 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Refaat, Dalia Coronas, Joaquín Universidad de Zaragoza (orcid)0000-0003-1512-4500 Téllez, Carlos Universidad de Zaragoza (orcid)0000-0002-4954-1188 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 356, Part A (2025), 129825 [13 pp.] Sep. Purif. Technol. Separation and Purification Technology 1383-5866 8095626 http://zaguan.unizar.es/record/147843/files/texto_completo.pdf Versión publicada 2685991 http://zaguan.unizar.es/record/147843/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:147843 articulos driver 2025-01-08-09:01:53 ARTICLE