Mixed matrix membranes, methods of making and using the same

By introducing MOF materials and MA composite amines into the membrane, the problems of insufficient permeability and selectivity in existing membrane separation technologies have been solved, achieving a highly efficient CO2 separation effect and promoting the industrialization of membrane separation CO2 capture technology.

CN119909554BActive Publication Date: 2026-07-24CHINA PETROLEUM & CHEMICAL CORP +2
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Patent Information

Application Number
CN202311432417.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-10-31
Publication Date
2026-07-24
Estimated Expiration
2043-10-31

AI Technical Summary

Technical Problem

Existing membrane separation technologies suffer from low permeability and low selectivity of the membrane materials used, resulting in low CO2 separation efficiency and making it difficult to achieve large-scale industrial applications.

Method used

A hybrid matrix membrane is used, comprising a polymer matrix and MOF materials and loaded MA composite amines dispersed therein. By coordinating the composite amines with the metals in the MOF materials, functional groups that can undergo reversible chemical reactions with CO2 are introduced, thereby enhancing the transfer of CO2 within the membrane, overcoming the 'trade-off' effect, and obtaining a membrane with both high permeability and high selectivity.

Benefits of technology

It achieves CO2 separation with high permeability and high selectivity, is suitable for large-scale continuous preparation, and enhances the industrial application potential of CO2 capture technology.

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Abstract

The application relates to the field of membrane separation technology, and particularly relates to a mixed matrix membrane and a preparation method and application thereof. The mixed matrix membrane comprises a polymer matrix and a filler dispersed in the polymer matrix; the filler comprises a MOF material and a MA composite amine loaded on the MOF material; the MA composite amine is selected from one or more of ethanolamine, methyl monoethanolamine, diethanolamine, N-methyl diethanolamine (MDEA), diisopropylamine, hydroxyethyl ethylenediamine and 2-amino-2-methyl-1-propanol. The mixed matrix membrane has high selectivity and high permeability, and is suitable for large-scale continuous preparation.
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