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吸附-扩散双驱动MOF膜的设计,用于高效的CO2分离

Yawei Gu¹, Rujing Hou¹, Yizhen Situ²

¹State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing, 211816, China.

Angewandte Chemie (International ed. in English)

|January 10, 2026

概括

我们开发了一个新的设计策略,用于使用金属有机框架 (MOFs) 的先进气体分离膜. 这种方法通过优化二氧化碳吸附和扩散来提高膜性能,克服了以前的局限性.

科学领域:

材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.
纳米技术纳米技术

背景情况:

由于可调节的孔结构,金属有机框架 (MOF) 对气体分离膜具有前途.
目前的MOF膜开发面临着透性-选择性权衡和低效选方法的挑战.

研究的目的:

建议和验证MOF膜的吸附-扩散双驱动设计策略.
为了平衡二氧化碳吸附亲和力和二氧化碳扩散性选择性,以改善气体分离.

主要方法:

使用高通量计算选来识别合适的MOF候选人.
三个yfm-拓MOF膜 (CAU-10H,CAU-10pydc,KMF-1) 进行了合成和测试.
对CO2/CH4分离和乙烯 (C2H2) 透性的实验膜性能进行了评估.

主要成果:

CAU-10H和CAU-10pydc膜已经超过了2019年CO2/CH4分离的上限.
CAU-10pydc实现了高的二氧化碳透性 (~2847 屏障) 和选择性 (185).
由于吸附亲和力更高,乙的透性显著降低 (39 Barrer),这证实了设计原理.

结论:

吸附-扩散双驱动设计策略有效地提高了MOF膜在气体分离中的性能.
这种方法为设计具有挑战性的气体分离膜提供了理论见解和实际指导.
合成的MOF膜表现出卓越的性能,性能优于许多最先进的材料.

关键词:

吸附-扩散双驱动设计.在CO2/CH4分离过程中.气体分离器气体分离器金属有机框架膜金属有机框架膜

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