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

Magdalena M. Lozinska, Elliott L. Bruce, James Mattock, Ruxandra G. Chitac, Paul A. Cox, Alessandro Turrina, Paul A. Wright

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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
Early online date8 Aug 2022
DOIs
Publication statusEarly online - 8 Aug 2022

Keywords

  • anion templating
  • interzeolite conversion
  • nitrate
  • OSDA-free synthesis
  • zeolite
  • UKRI
  • EPSRC
  • EP/S016201/1
  • EP/L017008/1
  • EP/T019298/1
  • EP/R023751/1
  • EP/S016147/1

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