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

doi:10.11944/j.issn.1000-0518.2015.05.140311

Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (5): 552-556.DOI: 10.11944/j.issn.1000-0518.2015.05.140311

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

CHAEMCHUEN Somboon^{a, b}, ZHOU Kui^{a, b}, YAO Chen^{a, b}, LUO Zhixiong^a, VERPOORT Francis^{a, b, *}

^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

Abstract

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

CLC Number:

CHAEMCHUEN Somboon, ZHOU Kui, YAO Chen, LUO Zhixiong, VERPOORT Francis. Alkali-Metal Tuning of Adsorption Sites in Metal Organic Frameworks MOF-5 for Carbon Dioxide/Methane Separation at Ambient Conditions[J]. Chinese Journal of Applied Chemistry, 2015, 32(5): 552-556.

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

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