Pore-Structure Control in Metal-Organic Frameworks (MOFs) for Capture of the Greenhouse Gas SF6 with Record Separation
Pore-Structure Control in Metal-Organic Frameworks (MOFs) for Capture of the Greenhouse Gas SF6 with Record Separation
复制标题
金属有机框架 (MOF) 中的孔隙结构控制，以创纪录的分离度捕获温室气体 SF 6
DOI：
10.1002/anie.202207066
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发表时间：
2022-07-04
影响因子：
16.6
通讯作者：
Yang, Qing-Yuan
中科院分区：
文献类型：
--
作者：
Wang, Shao-Min;Mu, Xuan-Tong;Yang, Qing-Yuan
在电子工业中，从SF6/N-2混合物中有效回收和捕获六氟化硫（SF6）非常重要。本文中，设计了三种具有微调孔结构的金属-有机框架，Cu（peba）（2），Ni（pba）（2）和Ni（ina）（2），用于SF6捕获。其中，Ni（ina）（2）具有与六氟化硫的动力学直径（5.2埃）相当的完美孔径（6埃），提供了对SF6气体的基准结合亲和力。在环境条件下，Ni（ina）（2）表现出最高的SF6/N-2选择性（298 K和1 bar时为375.1）和超高的SF6吸收能力（298 K和0.1 bar时为53.5 cm（3）g（-1））。通过动态穿透实验证实了Ni（ina）（2）的显著分离性能。理论计算和SF6负载的单晶结构提供了关键的洞察吸附/分离机制。这种多孔配位网络具有在工业应用中使用的潜力。
In the electronics industry, the efficient recovery and capture of sulfur hexafluoride (SF6) from SF6/N-2 mixtures is of great importance. Herein, three metal-organic frameworks with fine-tuning pore structures, Cu(peba)(2), Ni(pba)(2), and Ni(ina)(2), were designed for SF6 capture. Among them, Ni(ina)(2) has perfect pore sizes (6 angstrom) that are comparable to the kinetic diameter of sulfur hexafluoride (5.2 angstrom), affording the benchmark binding affinity for SF6 gas. Ni(ina)(2) exhibits the highest SF6/N-2 selectivity (375.1 at 298 K and 1 bar) and ultra-high SF6 uptake capacity (53.5 cm(3) g(-1) at 298 K and 0.1 bar) at ambient conditions. The remarkable separation performance of Ni(ina)(2) was verified by dynamic breakthrough experiments. Theoretical calculations and the SF6-loaded single-crystal structure provided critical insight into the adsorption/separation mechanism. This porous coordination network has the potential to be used in industrial applications.