应用化学 ›› 2015, Vol. 32 ›› Issue (5): 552-556.DOI: 10.11944/j.issn.1000-0518.2015.05.140311

• 研究论文 • 上一篇    下一篇

碱性金属修饰金属有机骨架材料MOF-5吸附位点及其常态下分离二氧化碳/甲烷的应用

周奎ab,姚宸ab,罗志雄a   

  1. a武汉理工大学材料复合新技术国家重点实验室金属有机催化功能材料课题组 武汉 430070
    b
    武汉理工大学材料科学与工程学院 武汉 430070
  • 收稿日期:2014-09-09 修回日期:2014-12-10 接受日期:2015-01-08 出版日期:2015-05-05 发布日期:2015-05-05

Alkali-Metal Tuning of Adsorption Sites in Metal Organic Frameworks MOF-5 for Carbon Dioxide/Methane Separation at Ambient Conditions

CHAEMCHUEN Somboona, b, ZHOU Kuia, b, YAO Chena, b, LUO Zhixionga, VERPOORT Francisa, b, *   

  1. aLaboratory of Organometallics,Catalysis and Ordered Materials,State Key Laboratory ofAdvanced Technology for Materials Synthesis and Processing, Wuhan University of Technology,Wuhan 430070,China
    bCenter for Chemical and Material Engineering,Wuhan University of Technology,Wuhan 430070,China
  • Received:2014-09-09 Revised:2014-12-10 Accepted:2015-01-08 Published:2015-05-05 Online:2015-05-05
  • Contact: VERPOORT Francis

摘要:

利用“一步法”合成并表征了4种碱性金属修饰的金属有机骨架材料MOF-5(记作M-MOF-5,M=Li,Na,K,Mg)。 并应用理想溶液吸附理论(IAST)对样品吸附选择性进行计算比较。 结果表明,碱性金属掺入可以降低MOF-5材料骨架结构的“互穿”程度,同时,在常温常压下,M-MOF-5对CO2/CH4的吸附选择性相对MOF-5(选择性为3.79)有着显著提高,尤其是Li-MOF-5(选择性为7.39)。 此外,Li-MOF-5的CO2捕获能力相对MOF-5也有提高。

 

关键词: 金属有机骨架材料MOF-5, 二氧化碳/甲烷选择性, 碱性金属, 骨架互穿

Abstract:

Alkali-metal modified metal organic frameworks MOF-5(denoted by M-MOF-5, M=Li, Na, K, Mg) were prepared by ‘one-step’ synthesis. The theoretical calculation(IAST, ideal adsorbed solution theory) was performed to compare the adsorption selectivity of materials. It is found that alkali-metal incorporated MOF-5 can reduce the interpenetration level of MOF-5 framework. The experiment results also show that M-MOF-5 can significantly improve the CO2/CH4 adsorption selectivity compared to MOF-5(3.79), especially Li-MOF-5(7.39) at ambient conditions. Furthermore, the CO2 capacity of Li-MOF-5 is also enhanced.

Key words: metal organic frameworks MOF-5, carbon dioxide/methane selectivity, alkali-metal, interpenetration

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