Gas permeability properties of Matrimid (R) membranes containing the metal-organic framework Cu-BPY-HFS

作者：Zhang Yanfeng; Musseman Inga H; Ferraris John P; Balkus Kenneth J Jr^*

来源：Journal of Membrane Science, 2008, 313(1-2): 170-181.

DOI：10.1016/j.memsci.2008.01.005

• mixed-matrix membrane
• gas separation
• metal-organic framework
• Cu-BPY-HFS
• natural gas
• Matrimid (R)

A microporous metal-organic framework Cu-4,4'-bipyridine-hexafluorosilicate (Cu-BPY-HFS), having a surface area of 2000m(2)/g, was combined with Matrimid (R) polymer to form free standing films. The permeability properties of Cu-BPY-HFS-Matrimid (R) mixed-matrix membranes were tested for the pure gases H(2), N(2), O(2), CH(4), and CO(2) and the gas mixtures CO(2)/CH(4), H(2)/CO(2) and CH(4)/N(2). The ideal selectivity of CH(4)/N(2) increased from 0.95 to 1.2 1, which suggests that Cu-BPY-HFS has a strong affinity towards CH(4) and favors its permeation. The higher solubility of CH(4) in the membranes leads to higher selectivity for CH(4)/N(2). The enhanced CH(4) transport is also apparent in the case of ideal selectivity for CO(2)/CH(4) and H(2)/CH(4). For CH(4)/N(2) gas mixtures, the selectivity increased from 0.95 to 1.7. The Cu-BPY-HFS's affinity towards CH(4), and its large surface area increased the solubility of CH(4) in the mixed-matrix membranes, which led to higher selectivity towards CH(4).

• 出版日期2008-4-10