| CH4/N2在Zr-MOFs上的吸附分离研究 |
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| 引用本文： | 韩素英,范卫东,高荔,曹运祥,孙道峰. CH4/N2在Zr-MOFs上的吸附分离研究[J]. 石油与天然气化工, 2017, 46(6): 56-61 |
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| 作者姓名： | 韩素英 范卫东 高荔 曹运祥 孙道峰 |
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| 作者单位： | 中国石油大学华东 国家重质油实验室,中国石油大学华东 国家重质油实验室,中国石油大学华东 国家重质油实验室,中国石油大学华东 国家重质油实验室,中国石油大学华东 国家重质油实验室 |
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| 摘 要： | 以H_4L为配体,与金属离子Zr~(4+)自组装得到棒状晶体Zr基金属有机框架材料(ZrMOFs),并借助X射线单晶衍射、N_2吸附脱附、X射线粉末衍射、热重等对其结构进行表征,利用气体吸附仪测量了CH_4和N_2的吸附等温线,采用克-克(Clausius-Clapeyron)方程计算CH_4的吸附热,并运用Ideal Adsorbed Solution Theory(IAST)理论来计算CH_4/N_2的分离因子(SCH_4/N_2)。结果表明:在273K、0.1MPa时,晶体Zr-MOFs对CH_4有较好的吸附效果,吸附量为8.2cm3/g,对CH_4/N_2的选择性分离因子(S)为6.3,且具有较好的分离效果;对吸附热力学的研究表明,CH_4的吸附热在20kJ/mol左右,相对分子筛类吸附剂吸附热较小,易于吸附剂的再生。
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| 关 键 词： | Zr-MOFs,CH4/N2分离 吸附等温线 吸附热 分离因子 |
| 收稿时间： | 2017-09-08 |
Adsorption-separation research of CH4/N2 on Zr-MOFs |
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| Han Suying,Fan Weidong,Gao Li,Cao Yunxiang and Sun Daofeng. Adsorption-separation research of CH4/N2 on Zr-MOFs[J]. Chemical Engineering of Oil and Gas, 2017, 46(6): 56-61 |
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| Authors: | Han Suying Fan Weidong Gao Li Cao Yunxiang Sun Daofeng |
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| Affiliation: | State Key Laboratory of Heavy Oil Processing, China University of Petroleum East China, Qingdao, Shandong, China,State Key Laboratory of Heavy Oil Processing, China University of Petroleum East China, Qingdao, Shandong, China,State Key Laboratory of Heavy Oil Processing, China University of Petroleum East China, Qingdao, Shandong, China,State Key Laboratory of Heavy Oil Processing, China University of Petroleum East China, Qingdao, Shandong, China and State Key Laboratory of Heavy Oil Processing, China University of Petroleum East China, Qingdao, Shandong, China |
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| Abstract: | Using ligands containing methyl and carboxylic acid H4L self-assemblyed with Zr4+, the rod-like crystals Zr-MOFs is gotten and characterized by X-ray single crystal diffraction, N2 adsorption, X-ray powder diffraction to analyze the structure. Adsorption isotherms of CH4/N2 are measured by adsorption instrument. The Clausius-Clapeyron equation is used to calculate the adsorption heat of CH4. The separation coefficient of CH4/N2 is calculated from the Ideal Adsorbed Solution Theory(IAST). The results show that Zr-MOFs has good adsorption effect on methane which is about 8.2 cm3/g at 273 K and 0.1 MPa, and the selectivity factor of CH4/N2 is 6.3 which means a better separation result. The isosteric heat of adsorption of CH4 is about 20 kJ/mol. Compared with other zeolite-like adsorbents, the isosteric heat of adsorption is lower, which means an easier regeneration. |
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| Keywords: | Zr-MOFs separation of CH4/N2 adsorption isotherms adsorption heat separation coefficient |
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