EM400/改性MIL-101(Cr)混合基质膜的制备及其CO2分离性能 |
作者:陈淑慧,赵 丹,任吉中,高继发 |
单位: 1. 洁净能源国家实验室,中国科学院大连化学物理研究所,大连116023; 2. 中国科学院大学,北京100049;3. 大连交通大学,大连116028 |
关键词: 混合基质膜;CO2分离;膜分离;MOF;MIL-101; |
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出版年,卷(期):页码: 2023,43(1):65-73 |
摘要: |
面对温室效应、气候变化的严重形势,膜技术对CO2分离捕集、减少CO2排放具有重要意义。为打破纯聚合物膜渗透性和选择性之间“Trade-off”的限制,以聚醚-酯EM400为基质,多孔金属有机框架MIL-101(Cr)为填料,制备EM400/MIL-101(Cr)混合基质膜,并对MIL-101(Cr)进行氨基化、硝基化、羟基化改性,研究其CO2分离性能。结果表明,MIL-101(Cr)的加入提高了EM400/MIL-101(Cr)混合基质膜的扩散系数和溶解系数,使得CO2渗透系数增强并保持气体选择性不变。改性后的混合基质膜以羟基化改性的EM400/MIL-101(Cr)-OH混合基质膜的CO2渗透性最高,以氨基化改性的EM400/MIL-101(Cr)-NH2混合基质膜的气体分离选择性最好。 |
Facing the situation of the greenhouse effect and climate change, membrane technology is of great significance for CO2 separation and capture to reduce CO2 emissions. To break the “Trade-off” between permeability and selectivity of polymers, the EM400/MIL-101(Cr) mixed matrix membranes (MMMs) were prepared by using EM400 (polyether-ester) as matrix and porous metal-organic framework (MOF), MIL-101(Cr), as filler. And then, the MIL-101(Cr) was modified by -NH2, -NO2 and -OH to study their CO2 separation performance. The results showed that the addition of MIL-101(Cr) can effectively improve the diffusion coefficient and dissolution coefficient of EM400/MIL-101(Cr) MMMs, resulting in an enhanced CO2 permeability with little change of selectivity. Among these EM400/modified MIL-101(Cr) MMMs, the EM400/MIL-101(Cr)-OH MMMs had the highest CO2 permeability, and the EM400/MIL-101-NH2 MMMs showed better gases selectivity. |
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作者简介: |
陈淑慧(1996-),女,福建南靖人,博士生,主要从事膜分离研究,E-mail:chensh@dicp.ac.cn. |
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