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论文类型：期刊论文

发表时间：2018-06-15

发表刊物：JOURNAL OF MEMBRANE SCIENCE

收录刊物：SCIE、EI

卷号：556

页面范围：54-65

ISSN号：0376-7388

关键字：Metal-organic framework membrane; UiO-66-NH2 membrane; Pervaporation; Desulfurization

摘要：Defect-free UiO-66-NH2 membranes with high performance were prepared on the inner side of porous tubular alpha-alumina substrates modified with a thin layer of zirconia and were explored for the deep desulfurization of model gasoline via pervaporation. The deliberate modification of the alpha-Al2O3 substrates with zirconia (ZrO2) sol greatly favors the formation of high-quality UiO-66-NH2 membranes. The effects of different phase states of ZrO2 on the growth of UiO-66-NH2 membranes were discussed. The effects of membrane polarity and pore diameter on the gasoline desulfurization were investigated by comparing the PV results of different UiO-66 series membranes. It has been found that UiO-66-NH2 membranes derived from tetragonal zirconia layer exhibit outstanding performance in pervaporation desulfurization, showing a flux of 2.16 kgm(-2) h(-1) and an enrichment factor of 17.86 along with high reproducibility for n-octane containing 1312 ppm thiophene as model gasoline at 40 degrees C. Besides, the influences of operation temperature and feed concentration on the PV performance of UiO-66-NH2 membranes were also investigated in detail. More importantly, due to the zirconia modification layer acting as strong anchoring sites between the membrane and substrate, UiO-66-NH2 membranes demonstrate excellent stability in model gasoline, thus showing the potential for the application in practical gasoline desulfurization.