• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Materials >A New Type of Composite Membrane PVA-NaY/PA-6 for Separation of Industrially Valuable Mixture Ethanol/Ethyl
【2h】

A New Type of Composite Membrane PVA-NaY/PA-6 for Separation of Industrially Valuable Mixture Ethanol/Ethyl

机译：一种新型复合膜PVA-NAY / PA-6用于分离工业上有价值的混合物乙醇/乙基

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Pervaporation is a membrane technique used to separate azeotropic and close boiling solvents. Heterogenous PVA composite membranes with NaY zeolite supported on polyamide-6 were fabricated and utilized in organic–organic pervaporation. The efficiency of prepared membranes was evaluated in the separation of ethanol/ethyl tert-butyl ether (EtOH/ETBE) using separation factor (β) and the thickness normalized pervaporation separation index (PSIN). Implementation of the fringe projection phase-shifting method allowed to the determined contact angle corrected by roughness. The influence of the presence of water traces in the feed on the overall separation efficiency was also discussed using the enrichment factor for water (EFwater). The incorporation of NaY into PVA matrix increases surface roughness and hydrophilicity of the composite membrane. It was found that membranes selectively transport ethanol from the binary EtOH/ETBE mixture. The values of β (2.3) and PSIN (288 μm g m−2 h−1) for PVA-NaY/PA6 membrane were improved by 143% and 160% in comparison to the values for the pristine PVA/PA6 membrane. It was found that membranes showed EFwater > 1, thus revealing the preferential transport of water molecules across membranes. These results are also significant for the design of membranes for the removal of water excess from the mixtures of organic solvents.
机译：渗透蒸发是一种用于分离共沸和关闭沸腾溶剂的膜技术。用氮素沸石在聚酰胺-6上负载的氮素沸石的异源性PVA复合膜进行制造，并用于有机 - 有机渗透散。使用分离因子（β）和厚度归一化的渗透蒸发分离指数（PSIN）在分离乙醇/乙基叔丁基醚（EtOH / ETBE）的分离中评价制备膜的效率。允许通过粗糙度校正所确定的接触角的条纹投影移相方法的实现。还使用水（EFWATE）的富集因子讨论了对整体分离效率的饲料中的水痕量的影响。 NAY进入PVA基质的掺入增加了复合膜的表面粗糙度和亲水性。发现膜选择性地将乙醇从二元EtOH / EtbE混合物中转运。与原始PVA / PA6膜的值相比，PVA-Nay / PA6膜的β（2.3）和PSIN（288μmgm-2 H-1）的值得到改善143％和160％。发现膜显示出EFWATER> 1，从而揭示跨膜的水分子的优先运输。这些结果对于膜的设计也显着，用于从有机溶剂的混合物中除去水过量。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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