An Extrinsic-Pore-Containing Molecular Sieve Film: A Robust, High-Throughput Membrane Filter

Sungwon Hong, Yanghwan Jeong, Hionsuck Baik, Nakwon Choi, Alex C.K. Yip, Jungkyu Choi

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

MFI type zeolites with 10-membered-ring pores (ca. 0.55 nm) have the ability to separate p-xylene (ca. 0.58 nm) from its bulkier isomers. Here, we introduced non-zeolitic micropores (ca. 0.6–1.5 nm) and mesopores (ca. 2–7 nm) to a conventional microporous MFI type zeolite membrane, yielding an unprecedented hierarchical membrane structure. The uniform, embedded non-zeolitic pores decreased defect formation considerably and facilitated molecular transport, resulting in high p-xylene perm-selectivity and molar flux. Specifically, compared to a conventional, crack network-containing MFI membranes of similar thickness (ca. 1 μm), the mesoporous MFI membranes showed almost double p-xylene permeance (ca. 1.6±0.4×10−7 mol m−2 s−1 Pa−1) and a high p-/o-xylene separation factor (ca. 53.8±7.3 vs. 3.5±0.5 in the conventional MFI membrane) at 225 °C. The embedded non-zeolitic pores allowed for decreasing the separation performance degradation, which was apparently related to coke formation.

Original languageEnglish
Pages (from-to)1323-1331
Number of pages9
JournalAngewandte Chemie - International Edition
Volume60
Issue number3
DOIs
Publication statusPublished - 2021 Jan 18

Bibliographical note

Funding Information:
This work was financially supported by the Mid-Career Researcher Program (2020R1A2C1101974), by the Korea CCS R&D Center (KCRC) (2014M1A8A1049309), and by the Super Ultra Low Energy and Emission Vehicle (SULEEV) Center (2016R1A5A1009592) through National Research Foundation (NRF) of Korea. These grants were funded by the Korea government (Ministry of Science and ICT). SK Innovation provided thoughtful insights into the factors related to the p-xylene perm-selectivities of zeolite membranes for real uses in industries. TEM and some SEM characterizations were conducted at KBSI (Seoul Center).

Funding Information:
This work was financially supported by the Mid‐Career Researcher Program (2020R1A2C1101974), by the Korea CCS R&D Center (KCRC) (2014M1A8A1049309), and by the Super Ultra Low Energy and Emission Vehicle (SULEEV) Center (2016R1A5A1009592) through National Research Foundation (NRF) of Korea. These grants were funded by the Korea government (Ministry of Science and ICT). SK Innovation provided thoughtful insights into the factors related to the ‐xylene perm‐selectivities of zeolite membranes for real uses in industries. TEM and some SEM characterizations were conducted at KBSI (Seoul Center). p

Publisher Copyright:
© 2020 Wiley-VCH GmbH

Keywords

  • MFI type zeolite membranes
  • defect-free membranes
  • hierarchical porous structure
  • non-zeolitic-pore-containing film
  • p-/o-xylene separations

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry

Fingerprint

Dive into the research topics of 'An Extrinsic-Pore-Containing Molecular Sieve Film: A Robust, High-Throughput Membrane Filter'. Together they form a unique fingerprint.

Cite this