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一种用于渗透汽化分离工业上有价值的乙醇/乙基丁基醚混合物的新型复合膜PVA-NaY/PA-6

A New Type of Composite Membrane PVA-NaY/PA-6 for Separation of Industrially Valuable Mixture Ethanol/Ethyl -Butyl Ether by Pervaporation.

作者信息

Knozowska Katarzyna, Kujawa Joanna, Lagzdins Renars, Figoli Alberto, Kujawski Wojciech

机构信息

Faculty of Chemistry, Nicolaus Copernicus University in Toruń, 7 Gagarina Street, 87-100 Toruń, Poland.

Faculty of Nature Sciences and Mathematics, Daugavpils University, 1 Parādes Street, LV-5401 Daugavpils, Latvia.

出版信息

Materials (Basel). 2020 Aug 20;13(17):3676. doi: 10.3390/ma13173676.

DOI:10.3390/ma13173676
PMID:32825354
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7504003/
Abstract

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 -butyl ether (EtOH/ETBE) using separation factor () and the thickness normalized pervaporation separation index (). 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 (). 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 (2.3) and (288 μm g m h) 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 > 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.

摘要

渗透蒸发是一种用于分离共沸和近沸溶剂的膜技术。制备了聚酰胺 -6负载NaY沸石的非均相PVA复合膜，并将其用于有机 - 有机渗透蒸发。使用分离因子（）和厚度归一化渗透蒸发分离指数（）评估制备膜在乙醇/乙基丁基醚（EtOH/ETBE）分离中的效率。采用条纹投影相移法可以测定经粗糙度校正的接触角。还使用水的富集因子（）讨论了进料中痕量水的存在对整体分离效率的影响。将NaY掺入PVA基质中可增加复合膜的表面粗糙度和亲水性。发现膜从二元EtOH/ETBE混合物中选择性地传输乙醇。与原始PVA/PA6膜的值相比，PVA-NaY/PA6膜的（2.3）和（288 μmg m h）值分别提高了143％和160％。发现膜的>1，从而揭示了水分子跨膜的优先传输。这些结果对于设计用于从有机溶剂混合物中去除过量水的膜也具有重要意义。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fe1c/7504003/679156b2ec4d/materials-13-03676-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fe1c/7504003/7a8a0e327651/materials-13-03676-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fe1c/7504003/679156b2ec4d/materials-13-03676-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fe1c/7504003/8f36c17b16ac/materials-13-03676-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fe1c/7504003/4988d8d2f5bf/materials-13-03676-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fe1c/7504003/c9da2f427c4b/materials-13-03676-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fe1c/7504003/ee106ba6f307/materials-13-03676-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fe1c/7504003/1ba1c58b037e/materials-13-03676-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fe1c/7504003/a607c2a57846/materials-13-03676-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fe1c/7504003/0e3964ec7581/materials-13-03676-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fe1c/7504003/4b0a0dd37af4/materials-13-03676-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fe1c/7504003/d2681db2ed9d/materials-13-03676-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fe1c/7504003/d5177c70bb4d/materials-13-03676-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fe1c/7504003/7a8a0e327651/materials-13-03676-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fe1c/7504003/679156b2ec4d/materials-13-03676-g012.jpg

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