A High-Performance N2-Selective MXene Membrane with Double Selectivity Mechanism for N2/CH4 Separation.
Small
; 20(14): e2309360, 2024 Apr.
Article
em En
| MEDLINE
| ID: mdl-37990358
ABSTRACT
Membrane-based separation process for unconventional natural gas purification (mainly N2/CH4 separation) has attracted more attention due to its considerable economic benefits. However, the majority of separation membranes at this stage, particularly N2-selective membranes, achieve the desired separation target by mainly relying on the diffusivity-selectivity mechanism. To overcome the limitation of a single mechanism, 2D lamellar MXene membranes with a double selectivity mechanism are prepared to enhance N2 permeance and N2/CH4 selectivity via introducing unsaturated metal sites into MXene, which can form specific interactions with N2 molecules and enhance N2 permeation. The resulting membranes exhibit an inspiring N2/CH4 separation performance with an N2 permeance of 344 GPU and N2/CH4 selectivity of 13.76. The collaboration of the double selectivity mechanism provides a new idea for the development of a novel N2-selective membrane for N2 removal and CH4 purification, which further broadens the application prospects of membrane separation technology in the field of unconventional natural gas purification.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Small
Ano de publicação:
2024
Tipo de documento:
Article