干湿条件下乙烷与乙烯高效分离的超疏水分子选择器

IF 15.6 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Mao Yi, Shan Wang, Shenfang Li, Shuo Zhang, Yilian Liu, Laiyu Zhang, Zifeng You, Xiongli Liu, Lin Li, Junhua Wang, Hao Wang, Qiao Zhao, Baiyan Li, Xian-He Bu
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引用次数: 0

摘要

从乙烷-乙烯混合物中一步提纯聚合物级(>99.95%)乙烯,探索抗湿、乙烷选择性吸附剂是非常重要的,但仍然是一个重大挑战。为了解决这一挑战,我们提出了一种基于多孔有机笼(POC)构建“超疏水分子选择器”(SMS)的新策略,该策略具有超疏水外表面和具有多个乙烷选择性功能位点的内腔。所制得的sm - poc -1具有优异的C2H6吸附容量(298 K时为97 cm3 g-1)和C2H6/C2H4选择性(298 K时Sads = 2.40),在所有C2H6选择性吸附剂中提供了乙烷吸附容量和C2H6/C2H4吸附选择性之间的良好平衡。特别是,突破性的实验表明,sm - poc1在60%相对湿度(RH)下可以有效地从C2H6/C2H4混合物中产生聚合物级C2H4,使其成为迄今为止报道的可在潮湿环境中稳定运行的选择性最高的吸附剂。实验结果与理论计算相结合表明,超疏水外表面、协同的C-H···π相互作用和氢键位点的共存是sm - poc -1在潮湿条件下具有高C2H6/C2H4分离性能的原因。因此,我们的工作不仅展示了指导抗湿吸附分离材料设计的一般策略,而且还展示了在碳氢化合物分离中潜在应用的有希望的候选材料。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Superhydrophobic Molecular Selector for Efficient Separation of Ethane over Ethylene under Dry and Humid Conditions

Superhydrophobic Molecular Selector for Efficient Separation of Ethane over Ethylene under Dry and Humid Conditions
Exploring humidity-resistant, ethane-selective adsorbents for the one-step purification of polymer-grade (>99.95%) ethylene from ethane-ethylene mixtures is of great importance, yet remains a significant challenge. To address this challenge, we present a novel strategy for constructing a “superhydrophobic molecular selector” (SMS) based on a porous organic cage (POC), which features a superhydrophobic outer surface and an inner cavity with multiple ethane-selective functional sites. The resulting SMS-POC-1 demonstrates excellent C2H6 adsorption capacity (97 cm3 g–1 at 298 K) and C2H6/C2H4 selectivity (Sads = 2.40 at 298 K), offering a superior trade-off between ethane adsorption capacity and C2H6/C2H4 adsorption selectivity among all C2H6-selective adsorbents. Especially, breakthrough experiments demonstrate that SMS-POC-1 efficiently produces polymer-grade C2H4 from C2H6/C2H4 mixtures at 60% relative humidity (RH), making it the highest-selectivity adsorbent reported to date that can stably operate in a humid environment. The combination of experimental results and theoretical calculations reveals that the coexistence of a superhydrophobic outer surface and synergistic C–H···π interactions and hydrogen-bonding sites accounts for the high C2H6/C2H4 separation performance under humid conditions for SMS-POC-1. Our work thus not only demonstrates a general strategy for guiding the design of humidity-resistant adsorption-separation materials but also presents a promising candidate for potential applications in hydrocarbon separation.
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来源期刊
CiteScore
24.40
自引率
6.00%
发文量
2398
审稿时长
1.6 months
期刊介绍: The flagship journal of the American Chemical Society, known as the Journal of the American Chemical Society (JACS), has been a prestigious publication since its establishment in 1879. It holds a preeminent position in the field of chemistry and related interdisciplinary sciences. JACS is committed to disseminating cutting-edge research papers, covering a wide range of topics, and encompasses approximately 19,000 pages of Articles, Communications, and Perspectives annually. With a weekly publication frequency, JACS plays a vital role in advancing the field of chemistry by providing essential research.
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