【摘要】 高硅ZSM-5沸石填充疏水性硅橡胶膜对纸浓度醇-水体系的渗透蒸发性质的研究表明,提高沸石硅铝比、增加填充量以及进行酸处理皆有利于改善膜对醇-水的分离系数和通量。料液的组成、浓度以及温度对膜的分离性质也有显著影响。更多还原

【Abstract】 Much research is being carried out on alcohol-selective membranes which are used in the separation of alcohol-water mixture with a low concentration. But the selectivity and flux of alcohol-selective membranes such as silicone rubber are too low. Addition to membrane of a sorptive filler with a high selectivity towards alcohol appears to improve both selectivity and flux. Silicious zeolite ZSM-5, a novel type of hydrophobic zeolite,has been used for that purpose. The results presented in this paper indicate that pretreating zeolite by acid, increasing silica/alumina ratio of the zeolite and zeolite content of the membrane can improve the selectivity and flux of the membranes, The separation properties are significantly influenced by feed composition and concentration, and operating temperature as well.更多还原