Mixed matrix membranes (MMMs) with amine-functionalized ZIF-L for enhanced CO2 separation performance

巴勒 聚乙烯亚胺 胺气处理 选择性 化学工程 烟气 化学 气体分离 高分子化学 材料科学 有机化学 催化作用 工程类 基因 生物化学 转染
作者
Zikang Qin,Yulei Ma,Wentao Du,Jing Wei,Jia Song,Xinyue Fan,Lu Yao,Lin Yang,Yuanfa Zhuang,Wenju Jiang,Zhongde Dai
出处
期刊:Separation and Purification Technology [Elsevier BV]
卷期号:344: 126831-126831 被引量:20
标识
DOI:10.1016/j.seppur.2024.126831
摘要

Amine-functionalized Metal-Organic Frameworks (MOFs) stand out as highly promising materials in membrane separation technology. Nevertheless, the incorporation of amine-functionalized additives may lead to uncontrollable alterations in MOF morphology. Two intact blade-like MOFs (PEI (Polyethylenimine)-ZIF-L and PAMAM (Polyamidoamine)-ZIF-L) were successfully synthesized by controlling the conditions and then introduced into Pebax 2533 to fabricate Mixed Matrix Membranes (MMMs). Hydrogen bonding and other interactions with Pebax can be formed by PEI-ZIF-L and PAMAM-ZIF-L to enhance interfacial compatibility. Simultaneously, a reversible reaction with CO2 molecules can be undergone by the amine groups, resulting in facilitated transport in MMMs. The CO2 separation performance of the MMMs is enhanced by this process, with the facilitation being more pronounced under humid conditions. Under humid conditions, the CO2 permeabilities of Pebax-PEI-ZIF-L (2 wt%) and Pebax-PAMAM-ZIF-L (2 wt%) MMMs were 639.4 Barrer and 702.7 Barrer, respectively, while the CO2/N2 selectivities were 26.68 and 24.35, respectively. Both permeability and selectivity exhibited a significant increase of 200% and 130%, respectively, compared to pure Pebax. Furthermore, the MMMs demonstrated excellent long-term stability during 72 h of continuous operation in a humid environment, showcasing significant potential for industrial applications, particularly in humid flue gas carbon capture.
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