Understanding the anion-templated, OSDA-free, interzeolite conversion synthesis of high silica zeolite ZK-5

Magdalena Malgorzata Lozinska*, Elliott Leigh Bruce, James Mattock, Ruxandra Georgiana Chitac, Paul A. Cox, Alessandro Turrina, Paul Anthony Wright*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

High silica zeolite ZK-5 (framework Si/Al=4.8) has been prepared by interzeolite conversion from ultrastable zeolite Y via a co-templating route using alkali metal cations and nitrate anions but without organic structure directing agents. The mechanism, which involves zeolite framework – alkali metal cation – nitrate anion ordering, has been established by a combination of chemical and thermal analyses, Raman spectroscopy, computational modelling, and X-ray powder diffraction. Ammonium exchange gives ZK-5 with occluded ammonium nitrate and subsequent heating gives microporous zeolite ZK-5.
Original languageEnglish
Article numbere202201689
Number of pages8
JournalChemistry - A European Journal
Volume28
Issue number56
Early online date8 Aug 2022
DOIs
Publication statusPublished - 7 Oct 2022

Keywords

  • Anion templating
  • Interzeolite conversion
  • Nitrate
  • OSDA-free synthesis
  • Zeollite

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