Efficient bio-ethanol recovery by non-contact vapor permeation process using membranes with tailored pore size and hydrophobicity
Efficient bio-ethanol recovery by non-contact vapor permeation process using membranes with tailored pore size and hydrophobicity
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使用具有定制孔径和疏水性的膜，通过非接触式蒸气渗透过程高效回收生物乙醇
DOI：
10.1016/j.ces.2019.06.047
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发表时间：
2019-11
影响因子：
4.7
通讯作者：
An Quan Fu
中科院分区：
文献类型：
--
作者：
Zheng Pei Yao;Zhang Wen Hai;Li Chong;Wang Nai Xin;Li Jie;Qin Zhen Ping;An Quan Fu
Vapor permeation seems to be a more suitable separation process than pervaporation in bio-ethanol recovery from fermentation broth because of its non-direct contact trait. The unsatisfactory flux and selectivity of polymeric membranes limit their utilization in industrial application. Here, we tailored the physical and chemical structure of commercial available polyacrylonitrile (PAN) ultrafiltration membrane to serve in vapor permeation. The membrane porosity was reduced till dense enough for separation while preserving an ultra-high flux by hydrolyzing in alkali. The hydrophilicity/hydrophobicity was controlled by grafting fluoroalkyl chains to ensure an acceptable ethanol selectivity. The changes of physical structure and chemical property were systematically characterized by Fourier transform infrared-attenuated total reflectance (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), water contact angle and pure water permeance. Tested at 60 °C, the optimized membrane exhibited a high flux ofca.10.5 kg m−2h−1and a permeate ethanol content similar to vapor-liquid equilibrium curve, which outstripped most polymeric membranes (applied in pervaporation or vapor permeation) in both flux and selectivity.
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影响因子：
4.7
作者：
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DOI：
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