Continuous Zeolite MFI Membranes Fabricated from 2D MFI Nanosheets on Ceramic Hollow Fibers

被引:92
作者
Min, Byunghyun [1 ]
Yang, Shaowei [1 ]
Korde, Akshay [1 ]
Kwon, Yeon Hye [1 ]
Jones, Christopher W. [1 ]
Nair, Sankar [1 ]
机构
[1] Georgia Inst Technol, Sch Chem & Biomol Engn, 311 Ferst Dr NW, Atlanta, GA 30332 USA
基金
美国国家科学基金会;
关键词
gas separation; hollow fibers; membranes; nanosheets; zeolites; SECONDARY GROWTH; SEPARATION; FILMS;
D O I
10.1002/anie.201903554
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
High-quality 2D MFI nanosheet coatings were prepared on alpha-alumina hollow fiber supports by vacuum filtration and then transformed into molecular sieving membranes by two sequential hydrothermal treatments. This processing method eliminates the need for specially engineered silica-based support materials that have so far been necessary to allow the formation of functional membranes from 2D MFI nanosheets. The sequential steps enhance adhesion of the membrane on the fiber support, fill in nanoscale gaps between the 2D nanosheets, and preserve the desirable (0k0) out-of-plane orientation without the need of any support engineering or modification. The membrane exhibits high performance for separation of n-butane from i-butane, and for other technologically important hydrocarbon separations. The present findings have strong implications on strategies for obtaining thin, highly selective zeolite membranes from 2D zeolites in a technologically scalable manner.
引用
收藏
页码:8201 / 8205
页数:5
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