Pushing the limits of high performance dual-layer hollow fiber fabricated via I2PS process in dehydration of ethanol
Pushing the limits of high performance dual-layer hollow fiber fabricated via I2PS process in dehydration of ethanol
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DOI：
10.1002/aic.14149
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发表时间：
2013-08
期刊：
影响因子：
3.7
通讯作者：
Y. Ong;T. Chung
中科院分区：
文献类型：
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作者：
Y. Ong;T. Chung
不相容诱导相分离(I2PS)是一种制备中空纤维的新方法，在乙醇渗透汽化脱水过程中具有极高的透水率和较高的水/乙醇选择性。作为前人工作的继续，本研究通过阐明内层材料的选择，揭示了提高I2PS纺制中空纤维性能的机理。此外，还揭示了通过增加内外表面的孔隙率来降低传质阻力的方法，以进一步提高膜的渗透通量。连续性能测试表明，由I2PS纺制的纤维在监测的300h内具有稳定的脱水性能。通过与文献中的渗透汽化膜的比较，验证了I2PS工艺纺制的膜的优越性，在80℃时最高渗透通量为9.5 kg/m2 h，渗透水纯度为95.8wt%。美国化学工程师学会学报，59：3006-3018,2013
The immiscibility induced phase separation (I2PS) process was introduced as a novel method to fabricate hollow fibers with exceptionally high water permeance and reasonably high water/ethanol selectivity in dehydration of ethanol by pervaporation. As a continuation of the previous work, this study discloses the mechanisms to enhance the performance of hollow fibers spun via I2PS by elucidating the material selection at the inner-layer. Moreover, it revealed the methods to reduce mass-transport resistance by enhancing surface porosity for both inner and outer surfaces to further improve the permeation flux of the membranes. The continuous performance test demonstrates that the fibers spun from the I2PS possess a stable dehydration performance throughout the monitored period of 300 h. A comparison with pervaporation membranes in the literatures verifies the superiority of the membranes spun via I2PS process with the highest water permeation flux of 9.5 kg/m2 h and the permeate water purity of 95.8 wt % at 80°C. © 2013 American Institute of Chemical Engineers AIChE J, 59: 3006–3018, 2013