Peng Ping, Lan Yongqiang, Liang Lun, Jia Kemeng
Laboratory of Membrane Science and Technology, School of Resource and Chemical Engineering, Sanming University, Sanming, 365004, Fujian, China.
Key Laboratory of Biobased Material Science & Technology (Education Ministry), Northeast Forestry University, Harbin, 150040, China.
Biotechnol Biofuels. 2021 Jan 7;14(1):10. doi: 10.1186/s13068-020-01857-y.
Bioethanol as a renewable energy resource plays an important role in alleviating energy crisis and environmental protection. Pervaporation has achieved increasing attention because of its potential to be a useful way to separate ethanol from the biomass fermentation process.
This overview of ethanol separation via pervaporation primarily concentrates on transport mechanisms, fabrication methods, and membrane materials. The research and development of polymeric, inorganic, and mixed matrix membranes are reviewed from the perspective of membrane materials as well as modification methods. The recovery performance of the existing pervaporation membranes for ethanol solutions is compared, and the approaches to further improve the pervaporation performance are also discussed.
Overall, exploring the possibility and limitation of the separation performance of PV membranes for ethanol extraction is a long-standing topic. Collectively, the quest is to break the trade-off between membrane permeability and selectivity. Based on the facilitated transport mechanism, further exploration of ethanol-selective membranes may focus on constructing a well-designed microstructure, providing active sites for facilitating the fast transport of ethanol molecules, hence achieving both high selectivity and permeability simultaneously. Finally, it is expected that more and more successful research could be realized into commercial products and this separation process will be deployed in industrial practices in the near future.
生物乙醇作为一种可再生能源，在缓解能源危机和环境保护方面发挥着重要作用。由于渗透汽化有可能成为从生物质发酵过程中分离乙醇的有效方法，因此受到了越来越多的关注。
本对通过渗透汽化分离乙醇的概述主要集中在传输机制、制备方法和膜材料上。从膜材料以及改性方法的角度对聚合物膜、无机膜和混合基质膜的研究与开发进行了综述。比较了现有渗透汽化膜对乙醇溶液的回收性能，并讨论了进一步提高渗透汽化性能的方法。
总体而言，探索渗透汽化膜用于乙醇萃取的分离性能的可能性和局限性是一个长期的课题。总的来说，目标是打破膜渗透率和选择性之间的权衡。基于促进传输机制，对乙醇选择性膜的进一步探索可能集中在构建精心设计的微观结构，提供促进乙醇分子快速传输的活性位点，从而同时实现高选择性和高渗透率。最后，预计会有越来越多成功的研究转化为商业产品，并且这种分离过程将在不久的将来应用于工业实践。
