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Superior interfacial design in ternary mixed matrix membranes to enhance the CO2 separation performance
Applied Materials Today ( IF 8.3 ) Pub Date : 2019-11-26 , DOI: 10.1016/j.apmt.2019.100491
Saeed Kalantari , Mohammadreza Omidkhah , Abtin Ebadi Amooghin , Takeshi Matsuura

The design of high performance mixed matrix membranes (MMMs) with new chemistry was the main challenge of membranologists in recent years. In this paper, extra high-performance MMMs were fabricated by incorporating the nickel zinc iron oxide nanoparticles and 1-Methyl-3-Octylimidazolium Hexafluorophosphate ionic liquid simultaneously into the Pebax®1657 polymer matrix. The influence of operating pressure (2–10 bar), IL blending (2–8 wt.%), and filler loading (0.5–2 wt.%) on gas permeation properties of each of prepared blend and ternary MMMs were investigated at 35 °C. Moreover, prepared membranes were evaluated by SEM, EDX, FTIR-ATR, DSC, XRD and Tensile analyses.

Results showed that the membrane containing 6.5 wt.% ionic liquid and 1.5 wt.% nanoparticle was the optimum. Indeed, a superior combination of Ni2+, Zn2+ and Fe3+ in NiZnFe4O4 as a filler and a unique ionic liquid [OMIM][PF6] with superior CO2 solubility caused an excellent interfacial design and compatibility in MMM structure, which was very effective on gas transport results and mechanical properties of fabricated MMMs. Comparing the results with the pristine membrane, CO2 permeability of the optimum membrane was 300 Barrer (with more than 145% improvement) at 10 bar while the CO2/CH4 and CO2/N2 selectivities were 97.5 (with 369% improvement) and 248.6 (with 281% improvement), respectively. Finally, it was concluded that the fabricated membranes was easily surpassed the Robeson upper bound.



中文翻译:

三元混合基质膜的出色界面设计可增强CO 2分离性能

近年来,膜技术人员面临的主要挑战是采用新化学方法设计高性能混合基质膜(MMM)。在本文中,通过将镍锌铁氧化物纳米粒子和1-甲基-3-邻咪唑鎓六氟磷酸盐离子液体同时掺入Pebax®1657聚合物基体中,制造出了更高性能的MMM。在35℃下,研究了工作压力(2-10 bar),IL共混(2-8 wt。%)和填料含量(0.5-2 wt。%)对制备的共混物和三元MMM气体渗透性能的影响。 ℃。此外,通过SEM,EDX,FTIR-ATR,DSC,XRD和拉伸分析评价了制备的膜。

结果表明,含有6.5 wt。%离子液体和1.5 wt。%纳米颗粒的膜是最佳的。实际上,NiZnFe 4 O 4中的Ni 2 +,Zn 2+和Fe 3+作为填充剂与独特的离子液体[OMIM] [PF 6 ]的优异组合具有优异的CO 2溶解性,从而导致了优异的界面设计和相容性。 MMM结构,对制造的MMM的气体传输结果和机械性能非常有效。将结果与原始膜进行比较,最佳膜的CO 2渗透率在10 bar时为300 Barrer(提高了145%以上),而CO 2 / CH 4和CO 2 / N 2的选择性分别为97.5(改善369%)和248.6(改善281%)。最后,得出的结论是,所制造的膜很容易超过Robeson上限。

更新日期:2019-11-26
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