Novel approaches to improving gas separation: Ionic liquids coated coke/ NH2-UiO-66-based mixed matrix membranes for CO2/N2 separation

IF 4 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Structure Pub Date : 2024-10-22 DOI:10.1016/j.molstruc.2024.140479

Narmin Noorani, Abbas Mehrdad, Alireza Fatehi-mollayousef

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Abstract

Permeability and separation efficiency of mixed matrix membranes (MMMs) are two important aspects. Polymeric membranes offer excellent mechanical and physical properties; however, they have a low permeability. To enhance the permeability and separation performance of polyvinyl chloride (PVC) membranes, Cholinium amino acid-based (IL) were impregnated with activated coke/ NH_2-UiO-66 (Zr) (AC/MOF) composite and then IL@AC/MOF filler was incorporated into PVC matrix. FTIR spectroscopy, TGA, SEM, EDX, and Brunauer-Emmett-Teller (BET) surface area measurement were used to characterize the MMMs prepared. The porous structure of MMMs nanocomposites causes AC/MOF composite to effectively accelerate gas the diffusion in the PVC matrix. The permeability measurements for CO₂ and N₂ were made at 288.15, 298.15, 308.15, and 318.15 K at pressure 3 bar The outcomes indicates that the incorporation of the IL@AC/MOF filler increased the permeability of the PVC/AC/MOF MMMs compared to the pure polymeric membrane. The mixed matrix membranes exhibit superior gas separation performance, surpassing the 2008 Robson's Upper Bound.

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改进气体分离的新方法：用于 CO2/N2 分离的离子液体涂覆焦炭/NH2-UiO-66 基混合基质膜

混合基质膜（MMM）的渗透性和分离效率是两个重要方面。聚合物膜具有出色的机械和物理特性，但渗透性较低。为了提高聚氯乙烯（PVC）膜的渗透性和分离性能，用活性焦炭/ NH2-UiO-66 (Zr)（AC/MOF）复合材料浸渍基于氨基酸的胆碱（IL），然后将 IL@AC/MOF 填料加入 PVC 基质中。傅立叶变换红外光谱、热重分析、扫描电镜、乙二胺四乙酸（EDX）和布鲁纳-艾美特-泰勒（BET）比表面积测量被用于表征制备的 MMMs。MMMs 纳米复合材料的多孔结构使 AC/MOF 复合材料能有效加速气体在 PVC 基质中的扩散。结果表明，与纯聚合物膜相比，IL@AC/MOF 填料的加入增加了 PVC/AC/MOF MMMs 的渗透性。混合基质膜表现出卓越的气体分离性能，超过了 2008 年罗布森上限。

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来源期刊

Journal of Molecular Structure 化学-物理化学

CiteScore

7.10

自引率

15.80%

发文量

2384

审稿时长

45 days

期刊介绍： The Journal of Molecular Structure is dedicated to the publication of full-length articles and review papers, providing important new structural information on all types of chemical species including: • Stable and unstable molecules in all types of environments (vapour, molecular beam, liquid, solution, liquid crystal, solid state, matrix-isolated, surface-absorbed etc.) • Chemical intermediates • Molecules in excited states • Biological molecules • Polymers. The methods used may include any combination of spectroscopic and non-spectroscopic techniques, for example: • Infrared spectroscopy (mid, far, near) • Raman spectroscopy and non-linear Raman methods (CARS, etc.) • Electronic absorption spectroscopy • Optical rotatory dispersion and circular dichroism • Fluorescence and phosphorescence techniques • Electron spectroscopies (PES, XPS), EXAFS, etc. • Microwave spectroscopy • Electron diffraction • NMR and ESR spectroscopies • Mössbauer spectroscopy • X-ray crystallography • Charge Density Analyses • Computational Studies (supplementing experimental methods) We encourage publications combining theoretical and experimental approaches. The structural insights gained by the studies should be correlated with the properties, activity and/ or reactivity of the molecule under investigation and the relevance of this molecule and its implications should be discussed.