High performance ZSM‐5 membranes on coarse macroporous α‐Al2O3 supports for dehydration of alcohols. Issue 8 (2nd April 2016)

• Record Type: Journal Article
• Authors: Li, Liangqing; Yang, Jianhua; Li, Jiajia; Wang, Jinqu; Lu, Jinming; Yin, Dehong; Zhang, Yan
• Is Part Of: AIChE journal. Volume 62:Issue 8(2016)
• Page Start: 2813
• Page End: 2824
• Publication Date: 2016-04-02
• Subjects: ZSM‐5 membrane -- dehydration of alcohols -- cheap coarse macroporus support -- pervaporation performance; Chemical engineering -- Periodicals; Génie chimique -- Périodiques; 660.28
• DOI: 10.1002/aic.15234
• Languages: English
• ISSNs: 0001-1541

Abstract

Abstract : High‐performance ZSM‐5 membranes with a low Si/Al ratio of 10.3 were prepared on cheap coarse macroporous α‐Al2 O3 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 ·18H2 O 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 ·18H2 O as an aluminum source from synthetic gel with composition of 1SiO2 /0.05Al2 O3 /0.17Na2 O/0.9NaF/45H2 O showed high reproducibility and high PV performance with flux of 3.85 kg/(m 2 ·h) and separation factor of higher than 10, 000 in dehydration of 90 wt % i‐PrOH/H2 O at 348 K. Moreover, the ZSM‐5 membranes exhibited high water perm‐selectivity performance for dehydration of 90 wt % n‐PrOH/H2 O, n‐BtOH/H2 O, and i‐BtOH/H2 O mixtures, respectively. © 2016 American Institute of Chemical Engineers AIChE J, 62: 2813–2824, 2016