| 二价铬/钼/镍空配位MOFs的CH4/N2吸附分离研究 |
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| 引用本文： | 贾晓霞,王丽,元宁,杨江峰,李晋平.二价铬/钼/镍空配位MOFs的CH4/N2吸附分离研究[J].化工学报,2018,69(9):3896-3904. |
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| 作者姓名： | 贾晓霞 王丽 元宁 杨江峰 李晋平 |
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| 作者单位： | 1. 太原理工大学化学化工学院精细化工研究所, 山西 太原 030024;
2. 气体能源高效清洁利用山西省重点实验室, 山西 太原 030024 |
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| 基金项目： | 国家自然科学基金项目（51672186，21676175）。 |
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| 摘 要： | 基于金属有机骨架材料中金属空配位对气体的强吸附作用，利用具有较高活性的二价金属Cr2+/Mo2+/Ni2+与均苯三酸（H3BTC）配位合成了HKUST-1（Cu-BTC）同构系列材料M-BTC（M=Cr、Mo、Ni），并与Cu-BTC对比分析了该类型材料中不同金属空配位对甲烷和氮气的吸附性能。实验结果显示，此三种材料均具有较好的甲烷选择吸附性，其中含Ni2+金属空位的Ni-BTC以其尤为突出的甲烷吸附热值而呈现较好的CH4/N2分离潜力；Cr2+空配位虽具有较强活性，但是对于甲烷的选择性吸附性能却低于含Cu2+空位的Cu-BTC材料。结合吸附选择性IAST计算分析得到此三种含较高活性不饱和金属空配位的MOFs材料对于甲烷选择性吸附作用能顺序为：Ni-BTC > Mo-BTC > Cu-BTC > Cr-BTC。
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| 关 键 词： | 甲烷 氮气 吸附 吸附剂 不饱和金属空配位 |
| 收稿时间： | 2018-03-21 |
| 修稿时间： | 2018-06-05 |
CH4/N2 adsorption separation research of MOFs with divalent Cr/Mo/Ni unsaturated metal sites |
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| JIA Xiaoxia,WANG Li,YUAN Ning,YANG Jiangfeng,LI Jinping.CH4/N2 adsorption separation research of MOFs with divalent Cr/Mo/Ni unsaturated metal sites[J].Journal of Chemical Industry and Engineering(China),2018,69(9):3896-3904. |
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| Authors: | JIA Xiaoxia WANG Li YUAN Ning YANG Jiangfeng LI Jinping |
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| Affiliation: | 1. College of Chemistry and Chemical Engineering, Research Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China;
2. Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, Taiyuan 030024, Shanxi, China |
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| Abstract: | Based on the strong interaction energy between the coordinatively unsaturated metal sites (UMSs) and the gas molecules, M-BTC(M=Cr, Mo, Ni), isostructural with HKUST-1 (Cu-BTC), were successfully synthesized via the coordination reaction of the high activity divalent metal (Cr2+/Mo2+/Ni2+) and organic ligand (H3BTC), and then to gain insight into the impact of gas-metal interactions on the selective adsorption of CH4 from N2 by comparing with classical materials (Cu-BTC). The results show the good CH4 selective adsorption properties of M-BTC (M=Cr, Mo, Ni) with UMSs. Among these materials, Ni-BTC with unsaturated Ni2+ sites presents the highest adsorption heat value for CH4, leading to the excellent CH4/N2 adsorption separation properties; but the Cr-BTC with high Cr2+ activity shows the lower ability for CH4/N2 separation than Cu-BTC. Combined the IAST calculation results, we verified the ability for the selective adsorption of CH4 molecules on M-BTC (M=Cr, Mo, Ni) and Cu-BTC followed as Ni-BTC > Mo-BTC > Cu-BTC > Cr-BTC. |
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| Keywords: | methane nitrogen adsorption adsorbents coordinatively unsaturated metal sites |
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