An Ultramicroporous Nickel-Based Metal-Organic Framework for Adsorption Separation of CO2 over N-2 or CH4
An Ultramicroporous Nickel-Based Metal-Organic Framework for Adsorption Separation of CO2 over N-2 or CH4
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用于 N-2 或 CH4 吸附分离 CO2 的超微孔镍基金属有机骨架
DOI：
10.1021/acs.energyfuels.8b02287
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发表时间：
2018
期刊：
影响因子：
5.3
通讯作者：
Xia Qibin
中科院分区：
文献类型：
--
作者：
Chen Yongwei;Wu Houxiao;Lv Daofei;Yang Wenyuan;Qiao Zhiwei;Li Zhong;Xia Qibin
金属-有机骨架材料在选择性捕集CO2以减少CO2排放方面具有巨大的潜力。在这项工作中，我们报道了一种镍基金属有机框架，Ni-4PyC，具有窄而均匀的超微孔6.8 μ m，表现出的CO2吸附容量为3.11 mmol/g，在298 K和100 kPa和高CO2/N2（0.15：0.85）和CO2/CH 4（0.5：0.5）的选择性分别为51和6，分别。同时，通过对CO2/N2和CO2/CH 4混合气体的穿透实验，证实了其动态分离性能，进一步证明了Ni-4PyC可以选择性地从烟气中捕集CO2和从天然气中脱除CO2。分子模拟结果表明，CO2分子靠近Ni-4PyC（吡啶）有机配体，导致CO2通过氢键被两个吡啶类化合物夹在中间.此外，Ni-4PyC在连续5次静态和动态吸附实验后，对CO2的吸附性能无明显损失，具有良好的循环利用性能。这些综合优点使Ni-4PyC成为从烟道气中捕获CO2以及天然气提质的优良吸附剂。
Metal–organic frameworks hold a great potential for selective CO2capture to mitigate massive CO2emission. In this work, we report a nickel-based metal–organic framework, Ni-4PyC, with narrow and uniform ultramicropores of 6.8 Å, exhibiting the CO2adsorption capacity of 3.11 mmol/g at 298 K and 100 kPa and high CO2/N2(0.15:0.85) and CO2/CH4(0.5:0.5) selectivities of 51 and 6, respectively. Meanwhile, its dynamic separation performance is also confirmed by breakthrough experiments of the CO2/N2and CO2/CH4mixtures, further demonstrating that Ni-4PyC can selectively capture CO2from flue gas and remove CO2from natural gas. Molecular simulation reveals that CO2molecules are close to the organic ligand of Ni-4PyC (pyridine), leading to CO2being caught in the middle by two pyridines like a plier via hydrogen bonds. Besides, Ni-4PyC has an excellent recyclability without noticeable loss in CO2adsorption after five consecutive cycles of static and dynamic adsorption experiments. These combinational merits make Ni-4PyC as an excellent adsorbent for related CO2capture from flue gas as well as natural gas upgrading.