将氨基酸功能化离子液体掺入高度多孔的MOF-177中以提高燃烧后CO捕集能力。

Philip Firuz A, Henni Amr

Faculty of Engineering and Applied Science, University of Regina, Regina, SK S4S 0A2, Canada.

Molecules. 2023 Oct 20;28(20):7185. doi: 10.3390/molecules28207185.

This study presents the encapsulation of two amino acid-based ionic liquids (AAILs), 1-ethyl-3-methylimidazolium glycine [Emim][Gly] and 1-ethyl-3-methylimidazolium alanine [Emim][Ala], in a highly porous metal-organic framework (MOF-177) to generate state-of-the-art composites for post-combustion CO capture. Thermogravimetric analysis (TGA) demonstrated a successful encapsulation of the AAILs, with a dramatic reduction in the composites' surface areas and pore volumes. Both [Emim][Gly]@MOF-177 and [Emim][Ala]@MOF-177 had close to three times the CO uptake of MOF-177 at 20 wt.% loading, 0.2 bar, and 303 K. Additionally, 20-[Emim][Gly]@MOF-177 and 20-[Emim] [Ala]@MOF-177 enhanced their CO/N selectivity from 5 (pristine MOF-177) to 13 and 11, respectively.

本研究展示了将两种基于氨基酸的离子液体（AAILs），即1-乙基-3-甲基咪唑鎓甘氨酸[Emim][Gly]和1-乙基-3-甲基咪唑鎓丙氨酸[Emim][Ala]，封装在高度多孔的金属有机框架（MOF-177）中，以制备用于燃烧后二氧化碳捕集的先进复合材料。热重分析（TGA）表明AAILs成功封装，复合材料的表面积和孔体积显著减小。在20 wt.%负载量、0.2 bar和303 K条件下，[Emim][Gly]@MOF-177和[Emim][Ala]@MOF-177的二氧化碳吸收量均接近MOF-177的三倍。此外，20-[Emim][Gly]@MOF-177和20-[Emim][Ala]@MOF-177分别将其CO/N选择性从5（原始MOF-177）提高到了13和11。