An Hetero-Epitaxially Grown Zeolite Membrane

Title
An Hetero-Epitaxially Grown Zeolite Membrane
Authors
최낙원정양환홍성원장은희김은주Hionsuck BaikAlex C. K. Yip최정규
Issue Date
2019-12
Publisher
Angewandte Chemie international edition
Citation
VOL 58, NO 51-18662
Abstract
The secondary growth methodology to form zeolite membranes has stringent requirements for homogeneous epitaxial intergrowth of the seed layer and limits the number of accessible high‐ quality zeolite membranes. Despite previous reports on hetero‐ epitaxial growth, high‐ performance zeolite membranes have yet to be reported using this approach. Here, the successful hetero‐ epitaxial growth of highly siliceous ZSM‐ 58 (DDR‐ type zeolite) films from a SSZ‐ 13 (CHA‐ type zeolite) seed layer is reported. The resulting membranes show excellent CO2 perm‐ selectivities, having maximum CO2  /N2 and CO2  /CH4 separation factors (SFs) as high as about 17 and 279, respectively, at 30  °C. Furthermore, the hybrid membrane maintains the CO2 perm‐ selectivity in the presence of water vapor (the third main component in both cases), that is, CO2  /N2 SF of about 14 and CO2  /CH4 SF of about 78, respectively, at 50  °C (a representative temperature of both CO2‐ containing streams).
URI
http://pubs.kist.re.kr/handle/201004/70683
ISSN
1433-7851
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KIST Publication > Article
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