中国科学院福建物质结构研究所吴明燕团队近日开发出一种笼状多孔材料，可以同时具有高C₂H₂存储能力和优异的C₂H₂/CO₂分离性能。该研究于2021年2月23日发表于国际一流学术期刊《德国应用化学》杂志上。

在该文中，该研究团队报道了一系列笼状多孔材料FJI-H8-R (R = Me, Et, nPr和iPr)，它们都在1.01 bar和298 K下具有较高的C₂H₂吸附能力。动态穿透实验表明，它们均表现出优异的C₂H₂/CO₂分离性能。特别是FJI‐H8‐Me，该材料的穿透时间长达90 min·g^-1以上。巨正则系综蒙特卡罗(GCMC)模拟结果表明，合适的孔隙空间和几何形状对优异的分离性能有重要作用。

据悉，由于其环保和节能的优点，基于吸附的分离是C₂H₂纯化的重要技术。除了C₂H₂/CO₂的高选择性，C₂H₂的高吸附率也在分离过程中扮演着重要角色。然而，吸附容量和分离性能之间的权衡仍然是一个两难的处境。

附：英文原文

Title: Cage‐like Porous Materials with Simultaneous High C2H2 Storage and Excellent C2H2/CO2 Separation Performance

Author: Zhengyi Di, Caiping Liu, Jiandong Pang, Cheng Chen, Falu Hu, Daqiang Yuan, Mingyan Wu, Maochun Hong

Issue&Volume: 2021-02-23

Abstract: Adsorption‐based separation is an important technology for C  2  H  2  purification due to the environmentally friendly and energy‐efficient advantage. In addition to the high selectivity of C  2  H  2  /CO  2  , the high uptake of C  2  H  2  also plays an important role in the separation progress. However, the trade‐off between adsorption capacity and separation performance is still in a dilemma. Herein, we report a series of cage‐like porous materials named FJI‐H8‐R (R = Me, Et,  n  Pr and  i  Pr) which all have high C  2  H  2  uptakes at 1.01 bar and 298 K. Dynamic breakthrough studies show that they all exhibit excellent C  2  H  2  /CO  2  separation performance. Particularly, FJI‐H8‐Me possesses a long breakthrough time up to 90 min g  ‐1  . Additionally, Grand Canonical Monte Carlo (GCMC) simulation reveals that the suitable pore space and geometry contribute much to the excellent separation performance.

DOI: 10.1002/anie.202101907

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202101907