CO2/CH4 and CH4/N2 separation on isomeric metal organic frameworks

doi:10.1016/j.cjche.2016.05.013

›› 2016, Vol. 24 ›› Issue (12): 1687-1694.DOI: 10.1016/j.cjche.2016.05.013

• Separation Science and Engineering • 上一篇下一篇

CO₂/CH₄ and CH₄/N₂ separation on isomeric metal organic frameworks

Xiaoqing Wang, Libo Li, Jiangfeng Yang, Jinping Li

Research Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan 030024, China

收稿日期:2016-04-06 修回日期:2016-05-17 出版日期:2016-12-28 发布日期:2017-01-04
通讯作者: Jiangfeng Yang,Tel.:+863516010550;Fax:+863516111178.E-mail address:yangjiangfeng@tyut.edu.cn
基金资助:
Supported by National Natural Science Foundation of China (No. 21136007, No. 51302184), and the National Research Fund for Fundamental Key Projects (No. 2014CB260402).

CO₂/CH₄ and CH₄/N₂ separation on isomeric metal organic frameworks

Xiaoqing Wang, Libo Li, Jiangfeng Yang, Jinping Li

Research Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan 030024, China

Received:2016-04-06 Revised:2016-05-17 Online:2016-12-28 Published:2017-01-04
Supported by:
Supported by National Natural Science Foundation of China (No. 21136007, No. 51302184), and the National Research Fund for Fundamental Key Projects (No. 2014CB260402).

摘要/Abstract

摘要： Two isomeric metal-organic frameworks (MOFs) with 2-dimensional (2D) and 3-dimensional (3D) topologies both comprised of Cu(II) and OTf (OTf=trifluoromethanesulfonate) ions were synthesized and characterized. The CO₂, CH₄ and N₂ adsorption properties of the two isomeric MOFs were investigated from 263 K to 298 K at 0.1 MPa. The results showed that the 2D MOF exhibited a higher selectivity for CO₂ from CO₂/CH₄ and CH₄ from CH₄/N₂ compared to the 3D MOF, even though it possessed a lower surface area and pore volume. The higher adsorption heats of gases on the 2D MOF inferred the strong adsorption potential energy in the layered MOFs. Dynamic separation experiments using CO₂/CH₄ and CH₄/N₂ mixtures on the two MOFs proved that the 2D MOF had a longer elution time than the 3D MOF as well as better separation abilities.

关键词: Metal-organic frameworks, Isomeric frameworks, Adsorption, Separation

Abstract: Two isomeric metal-organic frameworks (MOFs) with 2-dimensional (2D) and 3-dimensional (3D) topologies both comprised of Cu(II) and OTf (OTf=trifluoromethanesulfonate) ions were synthesized and characterized. The CO₂, CH₄ and N₂ adsorption properties of the two isomeric MOFs were investigated from 263 K to 298 K at 0.1 MPa. The results showed that the 2D MOF exhibited a higher selectivity for CO₂ from CO₂/CH₄ and CH₄ from CH₄/N₂ compared to the 3D MOF, even though it possessed a lower surface area and pore volume. The higher adsorption heats of gases on the 2D MOF inferred the strong adsorption potential energy in the layered MOFs. Dynamic separation experiments using CO₂/CH₄ and CH₄/N₂ mixtures on the two MOFs proved that the 2D MOF had a longer elution time than the 3D MOF as well as better separation abilities.

Key words: Metal-organic frameworks, Isomeric frameworks, Adsorption, Separation

Xiaoqing Wang, Libo Li, Jiangfeng Yang, Jinping Li. CO₂/CH₄ and CH₄/N₂ separation on isomeric metal organic frameworks[J]. , 2016, 24(12): 1687-1694.

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CO₂/CH₄ and CH₄/N₂ separation on isomeric metal organic frameworks

CO₂/CH₄ and CH₄/N₂ separation on isomeric metal organic frameworks

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