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- Title
High Performance ZSM-5 Membranes on Coarse Macroporous α-Al<sub>2</sub>O<sub>3</sub> Supports for Dehydration of Alcohols.
- Authors
Li, Liangqing; Yang, Jianhua; Li, Jiajia; Wang, Jinqu; Lu, Jinming; Yin, Dehong; Zhang, Yan
- Abstract
High-performance ZSM-5 membranes with a low Si/Al ratio of 10.3 were prepared on cheap coarse macroporous α- Al2O3 tubes by fluoride route without organic template. The effects of crystallization time and aluminum source on the growth, morphology and pervaporation (PV) performances of the as-synthesized membranes were investigated. The feasibility of preparing ZSM-5 membranes with different Si/Al ratio which was implemented by using different Al2(SO4)3·18H2O content in synthesis gel were discussed. It was found that the aluminum source had significant effect on the synthesis of membranes. The ZSM-5 membranes prepared by using Al2(SO4)3·18H2O as an aluminum source from synthetic gel with composition of 1SiO2/0.05Al2O3/0.17Na2O/0.9NaF/45H2O showed high reproducibility and high PV performance with flux of 3.85 kg/(m²·h) and separation factor of higher than 10,000 in dehydration of 90 wt % i- PrOH/H2O at 348 K. Moreover, the ZSM-5 membranes exhibited high water perm-selectivity performance for dehydration of 90 wt % n-PrOH/H2O, n-BtOH/H2O, and i-BtOH/H2O mixtures, respectively.
- Subjects
MACROPOROUS polymers; ZEOLITE catalysts; DEHYDRATION reactions; PERVAPORATION; CRYSTALLIZATION
- Publication
AIChE Journal, 2016, Vol 62, Issue 8, p2813
- ISSN
0001-1541
- Publication type
Article
- DOI
10.1002/aic.15234