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Article Dans Une Revue ChemSusChem Année : 2019

Green Hydrogen Separation from Nitrogen by Mixed‐Matrix Membranes Consisting of Nanosized Sodalite Crystals

Résumé

Nanosized sodalite crystals (Nano-SOD) are used as active filler to prepare mixed matrix membranes (MMMs) for promoting the H2/N2 gas separation performance. The Nano-SOD with extremely small crystallites (40-50 nm) are synthesized from a colloidal suspension free of organic structural directing agent, and uniformly dispersed in the Polyetherimide (PEI) matrix. The Nano-SOD filler with a proper aperture size (2.8 Å) allow only hydrogen molecules passing through and rejecting the nitrogen thus improving the selectivity of the membranes. The high dispersion of nanosized sodalite crystals in the polymer matrix and the proper interactions between the inorganic and organic phases greatly improve the membrane separation performance and minimize interfacial holes. The MMMs showed a high H2 permeability (~7155.1 Barrer at 25°C under atmospheric pressure) and ideal H2/N2 selectivity factor of ~16.9 in a single gas test. Moreover, in a gas mixture (H2/N2, 25-100°C), the selectivity factor increased significantly to ~30.9. The high stability of the MMMs consisting of highly dispersed nanosized SOD crystals in PEI matrix for H2/N2 separation (6 weeks continuous test), rendered them as important materials for ammonia synthesis application that requires and also releases a large amount of hydrogen.

Domaines

Génie chimique
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Dates et versions

hal-02409931 , version 1 (27-11-2020)

Identifiants

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Ge Yang, Hailing Guo, Zixi Kang, Lei Zhao, Shou Feng, et al.. Green Hydrogen Separation from Nitrogen by Mixed‐Matrix Membranes Consisting of Nanosized Sodalite Crystals. ChemSusChem, 2019, 12 (19), pp.4529-4537. ⟨10.1002/cssc.201802577⟩. ⟨hal-02409931⟩
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