Separation of CO2/CH4 and CH4/N2 mixtures using MOF-5 and Cu3(BTC)2

In this paper we used MOF-5 and Cu3(BTC)2 to separate CO2/CH4 and CH4/N2 mixtures under dynamic conditions. Both materials were synthesized and pelletized, thus allowing for a meaningful characterization in view of process scale-up. The materials were characterized by X-ray diffraction (XRD) and sca...

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Bibliographic Details
Published in:Journal of energy chemistry 2014-07, Vol.23 (4), p.453-460
Main Authors: Li, Junmin, Yang, Jiangfeng, Li, Libo, Li, Jinping
Format: Article
Language:English
Subjects:
Adsorption
Applied sciences
Chemical engineering
Exact sciences and technology
gas mixtures
metal organic framework
separation
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Summary:In this paper we used MOF-5 and Cu3(BTC)2 to separate CO2/CH4 and CH4/N2 mixtures under dynamic conditions. Both materials were synthesized and pelletized, thus allowing for a meaningful characterization in view of process scale-up. The materials were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). By performing breakthrough experiments, we found that Cu3(BTC)2 separated CO2/CH4 slightly better than MOF-5. Because the crystal structure of Cu3(BTC)2 includes unsaturated accessible metal sites formed via dehydration, it predominantly interacted with CO2 molecules and more easily captured them. Conversely, MOF-5 with a suitable pore size separated CH4/N2 more efficiently in our breakthrough test. Cu3(BTC)2 separates CO2/CH4 slightly better than MOF-5 under dynamic conditions, because the unsaturated accessible metal sites predominantly interacts with CO2 molecules. Conversely, MOF-5 with a suitable pore size separates CH4/N2 more efficiently.
ISSN:2095-4956
DOI:10.1016/S2095-4956(14)60171-6