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Efficient co_2/n_2 separation by mixed matrix membrane with amide functionalized porous coordination polymer filler

Chinese Chemical Letters 2018年第6期29卷 854-856页

作者： Qianqian Li Jingui Duan Wanqin Jin State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University

Mixed matrix membrane used to selective removal of co2 was considered as an efficient solution to energy and environmental sustainability. In this study, a MMM that consists of amide functionalized porous coordination polymer filler（MIL-53-nH2） was successfully prepared, which sharply promotes the co2/n2 selectivity from 44（neat polymeric membrane） to 75. Remarkably, the positive effect of amide group and nanochannel of MIL-53-nH2 filler was illustrated by decreased selectivity of the MMM with formic acid modified MIL-53-nH2 filler（MIL-53-nHcoH）.

关键词： Porous coordination polymer Mixed matrix membrane co2/n2 separation Amide group

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High and selective capture of low-concentration co2 with an anion-functionalized ultramicroporous metal-organic framework

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Science China Materials 2021年第3期64卷 691-697页

作者： Zhaoqiang Zhang Qi Ding Jiyu Cui Xili Cui Huabin Xing Key Laboratory of Biomass Chemical Engineering of Ministry of Education College of Chemical and Biological EngineeringZhejiang UniversityHangzhou310027China

co2 capture,especially under low-pressure range,is of significance to maintain long-duration human operation in confined spaces and decrease the co2 corrosion and freezing effect for the liquefaction of natural ***,we for the first time report a novel anion-functionalized ZU-16-co(TIFSIX-3-co,TIFSIX=hexafluorotitanate(TiF62−),3=pyrazine),which exhibits one-dimensional pore channels decorated by abundant F atoms,for efficient co2 capture at a concentration around 400–10,000 *** its isostructural MFSIX-3(M=Si,Ti,Ge)family materials,ZU-16-co with fine-tuned pore size of 3.62Åexhibits the highest co2 uptake at 0.01 bar(10,000 ppm)and 1 bar(2.63 and 2.87 mmol g−,respectively).The high co2 capture ability of ZU-16-co originates from the fine-tuned pore dimensions with strong F⋯C=O host-guest interactions and relatively large pore volumes coming from its longer coordinated Ti-F-co distance(3.9Å)in c *** excellent carbon trapping performance was further verified by dynamic breakthrough tests for co2/n2(1/99 and 15/85)and co2/CH4(50/50)*** adsorption and separation performances,resulting from the fine-tuned pore system with periodic arrays of exposed functionalities,demonstrate that ultramicroporous ZU-16-co can be a promising adsorbent for low-concentration carbon capture.

关键词： carbon capture ultramicroporous metal-organic frameworks gas adsorption co2/n2 separation natural gas purification

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