Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
633928 | Journal of Membrane Science | 2014 | 8 Pages |
Abstract
As a new type of filler for mixed matrix membranes (MMMs), metal-organic frameworks (MOFs) have received increasing attention. As a kind of MOFs, [Cu2(bdc)2(bpy)]n is successfully synthesized in this work and characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), dynamic light scattering (DLS), wide angle X-ray diffraction (WAXRD), thermogravimetric analysis (TGA) and adsorption isotherms. [Cu2(bdc)2(bpy)]n is found to preferentially adsorb methanol (MeOH) over methyl tert-butyl ether (MTBE). For this reason, the [Cu2(bdc)2(bpy)]n is incorporated into sulfonated polyarylethersulfone with cardo (SPES-C) to form [Cu2(bdc)2(bpy)]n/SPES-C MMMs for the separation of MeOH/MTBE mixtures. Both the sorption selectivity and the diffusion selectivity are found to increase with the addition of [Cu2(bdc)2(bpy)]n leading to an increase in the separation factor. With increasing [Cu2(bdc)2(bpy)]n loading from 5 to 20 wt%, the flux increased up to 0.288 kg mâ2 hâ1 at 20 wt% loading. A threshold of [Cu2(bdc)2(bpy)]n loading is approximately 20 wt% where the flux remains almost constant regardless of further increasing the [Cu2(bdc)2(bpy)]n content. This work demonstrates an improved performance of the [Cu2(bdc)2(bpy)]n/SPES-C MMMs for the separation of MeOH/MTBE mixtures.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Filtration and Separation
Authors
Guang Lu Han, Ke Zhou, Ao Nan Lai, Qiu Gen Zhang, Ai Mei Zhu, Qing Lin Liu,