期刊
JOURNAL OF MEMBRANE SCIENCE
卷 520, 期 -, 页码 646-656出版社
ELSEVIER
DOI: 10.1016/j.memsci.2016.08.028
关键词
Aromatic/aliphatic hydrocarbon separation; Hybrid membrane; Metal-organic framework; Pervaporation
资金
- National Natural Science Foundation of China [21322601, 21406006, 21576006]
- National High Technology Research and Development Program of China [2015AA03A602]
- Science and Technology Program of Beijing Municipal Education Commission [KM201510005010]
- China Postdoctoral Science Foundation [2015M580954]
In this work, Co(II)-formate (Co(HCOO)(2)) has been demonstrated feasible to be used as stable aromatic hydrocarbon transport carrier for facilitating aromatic hydrocarbon transport membranes. Metal-organic framework Co(HC00)(2) materials with different particle sizes were prepared through a solvothermal synthetic method, and then were doped into poly(ether-block-amide) (PEBA). The resulting hybrids were finally deposited on the outer surface of tubular ceramic substrate with a dynamic pressure-driven assembly method. The morphologies and structures of the resulting Co(HCOO)(2)/PEBA membranes were characterized by scanning electron microscope (SEM), energy dispersive X-ray spectrometer (EDX), powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA), positron annihilation lifetime spectroscopy (PALS), and nanoindentation. These membranes were then used in separating aromatic/aliphatic hydrocarbon mixtures through pervaporation. When the feed solution is 10 wt% toluene/n-heptane mixtures, the permeate flux of the membrane is 771 g/(m(2) h) with a separation factor of 5.1. Meanwhile, due to the immobilization effect of the Co(HCOO)(2) for Co(II) ions, the Co(HCOO)(2)/PEBA membrane showed stable separation performances. (C) 2016 Elsevier B.V. All rights reserved.
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