Optimizing the Microenvironment of Pores in an MOF for Boosting Ethylene Purification from a Ternary-Component Mixture

IF 11.3 1区化学 Q1 CHEMISTRY, PHYSICAL

ACS Catalysis Pub Date : 2024-09-06 DOI:10.1021/acsmaterialslett.4c0140610.1021/acsmaterialslett.4c01406

Peng-Dan Zhang, Xue-Qian Wu, Qi Shuai, Jiamei Yu*, Xin Zhang and Jian-Rong Li*,

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Abstract

Designing an adsorbent that can simultaneously trap acetylene (C₂H₂) and ethane (C₂H₆) impurities for the one-step purification of ethylene (C₂H₄) remains a challenge. Herein, we constructed a novel Cu-based metal–organic framework (MOF), BUT-321, which exhibits the selective adsorption of C₂H₂ and C₂H₆ over C₂H₄. It was found that the high density of oxygen binding sites within the pore channels of BUT-321 can build an optimal environment for stronger interactions with C₂H₆, compared to the isostructural MOF BUT-320. Column breakthrough experiments confirm the exceptional C₂H₄ separation performance of BUT-321 from both binary (1:1 for C₂H₂/C₂H₄ or C₂H₆/C₂H₄) and ternary (1:1:1 for C₂H₂/C₂H₄/C₂H₆) gas mixtures in a single step. In addition, BUT-321 exhibits good chemical stability in water and an alkaline solution, combined with its synthesis scalability, economic viability, and recyclability, thus facilitating the application for the one-step C₂H₄ purification.

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优化 MOF 中孔隙的微环境，提高三元组分混合物中乙烯的纯化率

设计一种能同时吸附乙炔（C2H2）和乙烷（C2H6）杂质的吸附剂以一步法提纯乙烯（C2H4）仍然是一项挑战。在此，我们构建了一种新型铜基金属有机框架 (MOF)--BUT-321，它可以选择性地吸附 C2H2 和 C2H6，而不吸附 C2H4。研究发现，与等结构 MOF BUT-320 相比，BUT-321 孔道内高密度的氧结合位点能为 C2H6 与 C2H2 的更强相互作用创造最佳环境。色谱柱突破实验证实了 BUT-321 从二元（C2H2/C2H4 或 C2H6/C2H4，1:1）和三元（C2H2/C2H4/C2H6，1:1:1）气体混合物中分离 C2H4 的优异性能。此外，BUT-321 在水和碱性溶液中具有良好的化学稳定性，同时还具有合成可扩展性、经济可行性和可回收性，因此有助于一步法 C2H4 纯化的应用。

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来源期刊

ACS Catalysis CHEMISTRY, PHYSICAL-

CiteScore

20.80

自引率

6.20%

发文量

1253

审稿时长

1.5 months

期刊介绍： ACS Catalysis is an esteemed journal that publishes original research in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. It offers broad coverage across diverse areas such as life sciences, organometallics and synthesis, photochemistry and electrochemistry, drug discovery and synthesis, materials science, environmental protection, polymer discovery and synthesis, and energy and fuels. The scope of the journal is to showcase innovative work in various aspects of catalysis. This includes new reactions and novel synthetic approaches utilizing known catalysts, the discovery or modification of new catalysts, elucidation of catalytic mechanisms through cutting-edge investigations, practical enhancements of existing processes, as well as conceptual advances in the field. Contributions to ACS Catalysis can encompass both experimental and theoretical research focused on catalytic molecules, macromolecules, and materials that exhibit catalytic turnover.