An Hetero-Epitaxially Grown Zeolite Membrane

Yanghwan Jeong, Sungwon Hong, Eunhee Jang, Eunjoo Kim, Hionsuck Baik, Nakwon Choi, Alex C.K. Yip, Jungkyu Choi

Research output: Contribution to journalArticle

4 Citations (Scopus)

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).

Original languageEnglish
Pages (from-to)18654-18662
Number of pages9
JournalAngewandte Chemie - International Edition
Volume58
Issue number51
DOIs
Publication statusPublished - 2019 Dec 16

Keywords

  • carbon dioxide
  • electron microscopy
  • membranes
  • separations
  • zeolites

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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