Method for separating CH4 / N2 through high-vacuum calcination of multi-MOF mixed matrix membrane
By treating the polymetallic organic frame material with high vacuum calcination and mixing it with alkaline polymer, an efficient polymetallic organic frame mixed matrix membrane was prepared, which solved the application limitations of metallic organic frame materials in CH4/N2 separation and achieved excellent gas separation performance.
CN119633624AActive Publication Date: 2025-03-18TIANJIN POLYTECHNIC UNIV
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Patent Information
- Application Number
- CN202411806861.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2044-12-10
AI Technical Summary
Technical Problem
The uneven carbonization of metal organic framework materials during vacuum resistance calcination is poorly compatible with the polymer matrix, which limits its application in CH4/N2 separation.
Method used
The polymetallic organic frame material was treated with high vacuum calcination technology to form surface carbonized hardened ZIF-8, MOF-74-Ni and UiO-66-NH2 nanoparticles, and mixed them uniformly with alkaline polymer polyvinylamine to prepare a polymetallic organic frame mixed matrix membrane by scraping the film method.
Benefits of technology
It significantly improves the separation performance of CH4/N2, achieves excellent CH4 permeability and selectivity, and is suitable for industrial production.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to a method for separating CH4 / N2 through high-vacuum calcination of a multi-MOF mixed matrix membrane, aims to realize effective separation of methane and nitrogen, comprises a preparation method, and belongs to the technical field of membrane separation. According to the method, a vacuum resistance calcination technology is adopted, so that the separation performance of CH4 / N2 is remarkably improved. According to the invention, alkaline polymer polyvinylamine is uniformly mixed with SCH-M / SCH-Z and SCH-M / SCH-U, and the multi-metal organic framework mixed matrix membrane is prepared by adopting a membrane scraping method. The preparation method has the beneficial effects that the MOF is carbonized by fully utilizing high-vacuum resistance calcination, so that the influence of gas separation performance of MMMs due to poor compatibility of non-uniform carbonization and a polymer matrix is solved. The method is simple to operate, mild in condition and suitable for industrial production.
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