RT info:eu-repo/semantics/article
T1 Single and mixed gas permeability studies on mixed matrix membranes composed of MIL-101(Cr) or MIL-177(Ti) and highly permeable polymers of intrinsic microporosity
A1 Esposito, Elisa
A1 Carta, Mariolino
A1 Fuoco, Alessio
A1 Monteleone, Marcello
A1 Comesaña Gandara, Bibiana
A1 Gkaniatsou, Effrosyni
A1 Sicard, Clémence
A1 Wang, Sujing
A1 Serre, Christian
A1 McKeown, Neil B.
A1 Jansen, Johannes C.
K1 Ciencia de los materiales
K1 Tecnología química
K1 Ingeniería química
K1 Contaminación atmosférica
K1 Membranas de matriz mixta
K1 PIMs
K1 MOFs
K1 MIL-101(Cr)
K1 MIL-177(Ti)
K1 Separación de gases
K1 Modelo de Maxwell
K1 3303 Ingeniería y Tecnología Químicas
K1 3312 Tecnología de Materiales
K1 2304 Química Macromolecular
AB The gas transport properties of mixed matrix membranes (MMMs), prepared by dispersing nanoparticles of MOFs MIL-101(Cr) or MIL-177(Ti) into highly permeable Polymers of Intrinsic Microporosity PIM-EA-TB or PIM-TMN-Trip, were investigated. The homogeneity of the dispersion was confirmed by means of Scanning Electron Microscopy (SEM) and Energy-dispersive X-ray (EDX) mapping analysis. Single gas time-lag measurements provided the permeability and ideal selectivity of different gas pairs, both after treatment of the MMMs with methanol and after natural aging over an extended period (up to 2000 days). This data demonstrated that the gas size-sieving pores of MIL-101(Cr) and MIL-177(Ti) and their good dispersion into the PIM matrix results in MMMs with enhanced gas separation performance, as compared to films composed solely of the polymer. The comparison of actual permeability with the Maxwell model for PIM-EA-TB with both MOFs confirmed the good dispersion and the absence of anomalies, whereas the inconsistency of permeability with prediction data for PIM-TMN-Trip suggests that the MOFs improved the polymer properties, stiffening or occupying the polymer free volume. In particular, the incorporation of MIL-101(Cr) into PIM-EA-TB significantly enhances the H2 permeability from ∼6000 to 13,000 Barrer, with a concurrent increase of the H2/N2 selectivity from 14 to 21. MIL-177(Ti) also enhances the H2/N2 selectivity to 20 due to a slight reduction of the N2 permeability. The addition of MIL-101(Cr) and MIL-177(Ti) into the ultra-permeable PIM-TMN-Trip showed more modest increases in H2 permeability and H2/N2 selectivity from 4.6 to ∼ 10. Hence the data for some of the MMMs surpass the 2008, and even approach the 2015/2019 Robeson’s upper bounds, particularly for gas pairs including H2.
PB Elsevier
SN 0376-7388
YR 2024
FD 2024
LK https://uvadoc.uva.es/handle/10324/82695
UL https://uvadoc.uva.es/handle/10324/82695
LA eng
NO Journal of Membrane Science, 2024, vol. 697.
NO Producción Científica
DS UVaDOC
RD 04-mar-2026