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Volume 13
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10.3390/membranes13110858
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Article

High-Performance FAU Zeolite Membranes Derived from Nano-Seeds for Gas Separation

by
Qing Wang
1,2,*,
Huiyuan Chen
1,
Feiyang He
1,
Qiao Liu
1,
Nong Xu
1,
Long Fan
1,
Chuyan Wang
3,
Lingyun Zhang
1 and
Rongfei Zhou
2,*
1
School of Energy, Materials and Chemical Engineering, Hefei University, Hefei 230601, China
2
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China
3
School of Biological Food and Environment, Hefei University, Hefei 230601, China
*
Authors to whom correspondence should be addressed.
Membranes 2023, 13(11), 858; https://doi.org/10.3390/membranes13110858
Submission received: 3 October 2023 / Revised: 17 October 2023 / Accepted: 21 October 2023 / Published: 26 October 2023
(This article belongs to the Section Membrane Applications)
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Abstract

In this study, high-performance FAU (NaY type) zeolite membranes were successfully synthesized using small-sized seeds of 50 nm, and their gas separation performance was systematically evaluated. Employing nano-sized NaY seeds and an ultra-dilute reaction solution with a molar composition of 80 Na2O: 1Al2O3: 19 SiO2: 5000H2O, the effects of synthesis temperature, crystallization time, and porous support (α-Al2O3 or mullite) on the formation of FAU membranes were investigated. The results illustrated that further extending the crystallization time or increasing the synthesis temperature led to the formation of a NaP impurity phase on the FAU membrane layer. The most promising FAU membrane with a thickness of 2.7 µm was synthesized on an α-Al2O3 support at 368 K for 8 h and had good reproducibility. The H2 permeance of the membrane was as high as 5.34 × 10−7 mol/(m2 s Pa), and the H2/C3H8 and H2/i-C4H10 selectivities were 183 and 315, respectively. The C3H6/C3H8 selectivity of the membrane was as high as 46, with a remarkably high C3H6 permeance of 1.35 × 10−7 mol/(m2 s Pa). The excellent separation performance of the membrane is mainly attributed to the thin, defect-free membrane layer and the relatively wide pore size (0.74 nm).
Keywords: FAU zeolite membrane; molecular sieve membrane; secondary growth; gas permeation; propylene propane separation; H2/C3H8 separation FAU zeolite membrane; molecular sieve membrane; secondary growth; gas permeation; propylene propane separation; H2/C3H8 separation

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MDPI and ACS Style

Wang, Q.; Chen, H.; He, F.; Liu, Q.; Xu, N.; Fan, L.; Wang, C.; Zhang, L.; Zhou, R. High-Performance FAU Zeolite Membranes Derived from Nano-Seeds for Gas Separation. Membranes 2023, 13, 858. https://doi.org/10.3390/membranes13110858

AMA Style

Wang Q, Chen H, He F, Liu Q, Xu N, Fan L, Wang C, Zhang L, Zhou R. High-Performance FAU Zeolite Membranes Derived from Nano-Seeds for Gas Separation. Membranes. 2023; 13(11):858. https://doi.org/10.3390/membranes13110858

Chicago/Turabian Style

Wang, Qing, Huiyuan Chen, Feiyang He, Qiao Liu, Nong Xu, Long Fan, Chuyan Wang, Lingyun Zhang, and Rongfei Zhou. 2023. "High-Performance FAU Zeolite Membranes Derived from Nano-Seeds for Gas Separation" Membranes 13, no. 11: 858. https://doi.org/10.3390/membranes13110858

APA Style

Wang, Q., Chen, H., He, F., Liu, Q., Xu, N., Fan, L., Wang, C., Zhang, L., & Zhou, R. (2023). High-Performance FAU Zeolite Membranes Derived from Nano-Seeds for Gas Separation. Membranes, 13(11), 858. https://doi.org/10.3390/membranes13110858

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