• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Vulcanized paper for separation of alcohol aqueous solutions by pervaporation
【24h】

Vulcanized paper for separation of alcohol aqueous solutions by pervaporation

机译：通过全蒸发分离酒精水溶液的硫化纸

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Paper membranes made from vulcanized cellulose were used for the pervaporation (PV) of aqueous solutions containing methanol, ethanol, and isopropanol. It was noted that the vulcanized cellulose paper membranes (VCPM) could effectively separate alcohol and water from the mixture solutions. To observe the effect of the separation of alcohol aqueous mixtures, the permeation behavior of water and alcohol was examined by means of the separation factor and the permeation flux. The values of the permeation flux in the ethanol/water mixtures were found to vary from 6.2 kg/m2h to 2.1 kg/m2h, as the concentration of ethanol increased from 8 to 87 wt %, and the separation factor (α) changed from α = 2.6 to 6.6, respectively. This showed that the VCPM enhanced the separation of water and alcohol. The highest value observed for the permeation flux was 11 kg/m2h at 87 wt % of methanol concentration and the separation factor at this condition was 4.1. It was shown also that an efficient separation was obtained in the isopropanol/water mixture with a separation factor of 16.6. The contact angles of alcohol/water droplets on the VCPM were measured as well as the wettability of the membrane. There was a tendency of decrease for the contact angle, as the alcohol concentration decreased. This suggested that the solvent wettability decreased in high alcohol concentrations. It was concluded that a high permeabilitty of water through the VCPM resulted in the separation of alcohols and water in the PV process.
机译：由硫化纤维素制成的纸膜用于含甲醇，乙醇和异丙醇的水溶液的全蒸发（PV）。值得注意的是，硫化纤维素纸膜（VCPM）可以有效地从混合物溶液中分离出酒精和水。为了观察分离醇水溶液混合物的效果，通过分离因子和渗透通量检查了水和醇的渗透行为。发现当乙醇浓度从8 wt％增加到87 wt％，分离因子（α）从α变化时，乙醇/水混合物中的渗透通量值从6.2 kg / m2h到2.1 kg / m2h不等。分别为2.6至6.6。这表明VCPM增强了水和酒精的分离。在甲醇浓度为87 wt％时，观察到的渗透通量的最大值为11 kg / m2h，在此条件下的分离系数为4.1。还显示出在异丙醇/水混合物中获得了有效分离，分离系数为16.6。测量了酒精/水滴在VCPM上的接触角以及膜的润湿性。随着酒精浓度的降低，接触角有减小的趋势。这表明高酒精浓度下溶剂的润湿性降低。结论是，通过VCPM的高水渗透性导致了PV过程中酒精和水的分离。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号