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- Title
Fabrication of b‐Oriented MFI Zeolite Membranes by a Printing‐Transfer Seed Layer Procedure.
- Authors
Yang, Yanwei; Lu, Xiaofei; Zhang, Huayu; Yu, Xingtong; Zheng, Qiancheng; Wang, Zhengbao
- Abstract
Highly b‐oriented MFI zeolite (abbreviated as BOMZ) membranes are attractive due to less grain boundary defects and straight channels normal to the substrate, enhancing selectivity and flux in membrane separation. Herein, we demonstrate a novel, effective and easily‐amplified printing‐transfer oriented‐seed‐layer technique to manufacture uniform BOMZ seed monolayer on porous supports. Furthermore, a facile and effective approach for the synthesis of highly BOMZ membranes by introducing poly(hexamethylene biguanide) hydrochloride as a twin crystal inhibitor during seeded growth is demonstrated. Well‐intergrown BOMZ membranes (∼650 nm thick) obtained on porous Al2O3 supports show a flux of 2.8 kg m−2 h−1 with a separation factor as high as 71 for pervaporation in the 60 °C feed of EtOH/H2O (5 wt%), which is much higher than those of random membranes. The developed seed assembly technique on porous supports underlines great potential for facile preparation of oriented seed layers on porous supports.
- Subjects
ZEOLITES; MEMBRANE separation; TWINNING (Crystallography); SEEDS; CRYSTAL grain boundaries; GRAIN
- Publication
Chemistry - An Asian Journal, 2023, Vol 18, Issue 11, p1
- ISSN
1861-4728
- Publication type
Article
- DOI
10.1002/asia.202300218