https://scholars.lib.ntu.edu.tw/handle/123456789/598142
標題: | NaP1 zeolite membranes with high selectivity for water-alcohol pervaporation | 作者: | Guo J.-C Zou C Chiang C.-Y Chang T.-A Chen J.-J Lin L.-C DUN-YEN KANG LI-CHIANG LIN |
關鍵字: | Alcohol dehydration;NaP1 zeolite;Pervaporation;Zeolite GIS;Zeolite membrane;Dehydration;Ethanol;Evaporation;Geographic information systems;Hydrophilicity;Membranes;Pore size;High selectivity;Isopropanol;Membrane material;Membrane pervaporation;Si/Al ratio;Water alcohols;Zeolites;2 propanol;alcohol;alcohol derivative;aluminum;nucleosome assembly protein 1;silicon;water;zeolite;adsorption;Article;diffusion;diffusivity;hydrophilicity;membrane;particle size;pervaporation;simulation;X ray diffraction;GIS;Water;Wettability | 公開日期: | 2021 | 卷: | 639 | 來源出版物: | Journal of Membrane Science | 摘要: | Membrane pervaporation is an emerging technique for the separation of water from alcohols, and zeolites with ordered ultramicropores (pore size <0.7 nm) have shown particular promise for use as membrane materials. This is the first paper to propose the use of NaP1 zeolite in membrane pervaporation. NaP1 zeolite has a GIS type topology with an 8-member ring that forms a pore limiting diameter of 3.0 ?, which is ideal for the separation of water from alcohols. NaP1 zeolite membranes with various Si/Al ratios (1.9, 3.3, and 3.9) were made via the seeded growth. Pervaporation tests were performed using an aqueous feed solution of 90 wt% ethanol or IPA at 348 K. The sample with a Si/Al ratio of 3.3 achieved separation factors surpassing most existing zeolite membranes: water/ethanol (200,000) and water/isopropanol (36,000). Nano-beam X-ray diffraction was used to map grain sizes in membrane samples, due to its role in surface hydrophilicity. State-of-the-art molecular simulations provided valuable insights into the diffusion and adsorption of water/alcohol molecules in NaP1 zeolite. From simulations, NaP1 zeolite presented a high water diffusivity and a high adsorption selectivity of water over ethanol or isopropanol. Experiment and computation results demonstrate the potential of NaP1 zeolite as a membrane material for alcohol dehydration. ? 2021 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85113458392&doi=10.1016%2fj.memsci.2021.119762&partnerID=40&md5=649f8b07da39dc8722b442b049a8bbf9 https://scholars.lib.ntu.edu.tw/handle/123456789/598142 |
ISSN: | 03767388 | DOI: | 10.1016/j.memsci.2021.119762 |
顯示於: | 化學工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。