Pervaporation Performance of Hollow-Fiber Chitosan-Polyacrylonitrile Composite Membrane in Dehydration of Ethanol
Pervaporation Performance of Hollow-Fiber Chitosan-Polyacrylonitrile Composite Membrane in Dehydration of Ethanol
复制标题
中空纤维壳聚糖-聚丙烯腈复合膜在乙醇脱水中的渗透汽化性能
DOI：
10.1252/jcej.25.17
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发表时间：
1992
影响因子：
0.8
通讯作者：
S. Kyo
中科院分区：
文献类型：
--
作者：
Kazunori Watanabe;S. Kyo
在进料组成（95-99.8重量%）、温度（40-75°C）和压力（0.1-1.8 kPa）的各种条件下，以6 m2模块规模评价了由具有电离交联壳聚糖薄层的聚丙烯腈中空纤维组成的渗透蒸发膜的性能，该膜是为含水有机混合物脱水而开发的。实验结果表明，该膜组件在乙醇浓度为95wt%时，渗透速率为0.6kg/（m2·h），分离因子为5000，且渗透速率与进料中水的摩尔分数的1.3次方成正比。而分离因子在乙醇浓度从95到99.5wt%的范围内几乎是恒定的。在低于进料中水的分蒸气压的操作压力下，渗透速率的温度依赖性遵循Arkenius方程，其活化能为54 kJ/mol，与操作压力无关。
Performance of a pervaporation membrane consisting of polyacrylonitrile hollow fiber with a thin ionized cross-linking chitosan layer, developed for dehydration from aqueous organic mixture, was evaluated at the scale of a 6 m2 module under various conditions of feed composition (95–99.8 wt%), temperature (40–75°C) and pressure (0.1–1.8 kPa). The data indicate high performance of the module in both permeation rate and separation factor, 0.6 kg/(m2·h) and 5000 respectively at an ethanol concentration of 95 wt%.It was also shown that the permeation rates vary in proportion to the mole fraction of water in the feed to the power of 1.3, while the separation factor was almost constant in the range of ethanol concentration from 95 to 99.5 wt%. Under an operating pressure lower than the partial vapor pressure of water in the feed, the temperature dependence of the permeation rate follows the Arrhenius equation with an activation energy of 54 kJ/mol independently of the operating pressure.