ZIF-8 membranes supported on silicalite-seeded substrates for propylene/propane separation

Shailesh Dangwal; Anil Ronte; Han Lin; Ruochen Liu; Jiahua Zhu; Jong Suk Lee; Heather Gappa-Fahlenkamp; Seok Jhin Kim

doi:10.1016/j.memsci.2021.119165

ZIF-8 membranes supported on silicalite-seeded substrates for propylene/propane separation

Shailesh Dangwal, Anil Ronte, Han Lin, Ruochen Liu, Jiahua Zhu, Jong Suk Lee, Heather Gappa-Fahlenkamp, Seok Jhin Kim

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

Zeolitic Imidazolate Framework-8 (ZIF-8) membranes have shown great potential for effective separation of industrially important propylene/propane gas mixtures. In this work, we coated the silicalite seed nanoparticles on the anodic alumina oxide (AAO) substrate in order to increase membrane-substrate bonding. ZIF-8 membrane was synthesized on a silicalite-seeded AAO substrate by secondary growth method. It was found that high quality ZIF-8 membrane was fabricated due to strong attachment of silicalite seed crystals to AAO substrates through hydrogen bonding. Moreover, when ZnCl₂ was used as the Zn source, the ZIF-8 layer was formed with larger ZIF-8 crystal size and a more intergrown surface than the layer in which ZnNO₃ was used. An excellent propylene/propane separation factor of 170 was obtained in a silicalite-seeded ZIF-8 membrane with ZnCl₂, which is twice that of a ZIF-8 membrane synthesized without the seeding process, and which is 3.6 times higher than a silicalite-seeded ZIF-8 membrane with ZnNO₃.

Original language	English
Article number	119165
Journal	Journal of Membrane Science
Volume	626
DOIs	https://doi.org/10.1016/j.memsci.2021.119165
State	Published - May 15 2021
Externally published	Yes

Funding

The authors gratefully acknowledge funding from Oklahoma State University . The authors would like to thank Prof. Nicholas F. Materer in Department of Chemistry at Oklahoma State University for the use of BET. The authors give special thanks to Pamela Reynolds at Oklahoma State University for editing the manuscript.

Keywords

Propylene/propane separation
Secondary growth
Silicalite seeding
ZIF-8 membrane

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10.1016/j.memsci.2021.119165

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title = "ZIF-8 membranes supported on silicalite-seeded substrates for propylene/propane separation",

abstract = "Zeolitic Imidazolate Framework-8 (ZIF-8) membranes have shown great potential for effective separation of industrially important propylene/propane gas mixtures. In this work, we coated the silicalite seed nanoparticles on the anodic alumina oxide (AAO) substrate in order to increase membrane-substrate bonding. ZIF-8 membrane was synthesized on a silicalite-seeded AAO substrate by secondary growth method. It was found that high quality ZIF-8 membrane was fabricated due to strong attachment of silicalite seed crystals to AAO substrates through hydrogen bonding. Moreover, when ZnCl2 was used as the Zn source, the ZIF-8 layer was formed with larger ZIF-8 crystal size and a more intergrown surface than the layer in which ZnNO3 was used. An excellent propylene/propane separation factor of 170 was obtained in a silicalite-seeded ZIF-8 membrane with ZnCl2, which is twice that of a ZIF-8 membrane synthesized without the seeding process, and which is 3.6 times higher than a silicalite-seeded ZIF-8 membrane with ZnNO3.",

keywords = "Propylene/propane separation, Secondary growth, Silicalite seeding, ZIF-8 membrane",

author = "Shailesh Dangwal and Anil Ronte and Han Lin and Ruochen Liu and Jiahua Zhu and Lee, {Jong Suk} and Heather Gappa-Fahlenkamp and Kim, {Seok Jhin}",

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AU - Dangwal, Shailesh

AU - Ronte, Anil

AU - Lin, Han

AU - Liu, Ruochen

AU - Zhu, Jiahua

AU - Lee, Jong Suk

AU - Gappa-Fahlenkamp, Heather

AU - Kim, Seok Jhin

PY - 2021/5/15

Y1 - 2021/5/15

N2 - Zeolitic Imidazolate Framework-8 (ZIF-8) membranes have shown great potential for effective separation of industrially important propylene/propane gas mixtures. In this work, we coated the silicalite seed nanoparticles on the anodic alumina oxide (AAO) substrate in order to increase membrane-substrate bonding. ZIF-8 membrane was synthesized on a silicalite-seeded AAO substrate by secondary growth method. It was found that high quality ZIF-8 membrane was fabricated due to strong attachment of silicalite seed crystals to AAO substrates through hydrogen bonding. Moreover, when ZnCl2 was used as the Zn source, the ZIF-8 layer was formed with larger ZIF-8 crystal size and a more intergrown surface than the layer in which ZnNO3 was used. An excellent propylene/propane separation factor of 170 was obtained in a silicalite-seeded ZIF-8 membrane with ZnCl2, which is twice that of a ZIF-8 membrane synthesized without the seeding process, and which is 3.6 times higher than a silicalite-seeded ZIF-8 membrane with ZnNO3.

AB - Zeolitic Imidazolate Framework-8 (ZIF-8) membranes have shown great potential for effective separation of industrially important propylene/propane gas mixtures. In this work, we coated the silicalite seed nanoparticles on the anodic alumina oxide (AAO) substrate in order to increase membrane-substrate bonding. ZIF-8 membrane was synthesized on a silicalite-seeded AAO substrate by secondary growth method. It was found that high quality ZIF-8 membrane was fabricated due to strong attachment of silicalite seed crystals to AAO substrates through hydrogen bonding. Moreover, when ZnCl2 was used as the Zn source, the ZIF-8 layer was formed with larger ZIF-8 crystal size and a more intergrown surface than the layer in which ZnNO3 was used. An excellent propylene/propane separation factor of 170 was obtained in a silicalite-seeded ZIF-8 membrane with ZnCl2, which is twice that of a ZIF-8 membrane synthesized without the seeding process, and which is 3.6 times higher than a silicalite-seeded ZIF-8 membrane with ZnNO3.

KW - Propylene/propane separation

KW - Secondary growth

KW - Silicalite seeding

KW - ZIF-8 membrane

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ER -

ZIF-8 membranes supported on silicalite-seeded substrates for propylene/propane separation

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