Evaluation of Brønsted and Lewis acid sites in H-ZSM-5 and H-USY with or without metal modification using probe molecule-synchrotron X-ray powder diffraction

Benedict T.W. Lo, Wei che Lin, Molly Meng Jung Li, Sarah Day, Chiu Tang, Shik Chi Edman Tsang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

The adsorbate interactions of furans as probe molecules in H-ZSM-5 and H-USY with and without metal ion modification have been revealed by synchrotron X-ray powder diffraction (SXRD). The Rietveld refinements give both qualitatively and quantitatively the spatial arrangements and adsorption geometries of furan and 2,5-dimethylfuran (DMF) on the Brønsted acid sites (BAS) and metal Lewis acid sites (LAS). The bonding information between the adsorbate-framework can also be correlated with thermogravimetric findings. The use of probe molecule-SXRD can be used as a new characterisation tool which can spatially interrogate the acidity of crystalline porous catalysts, leading to molecular engineering of new catalytic systems.

Original languageEnglish
Article number117528
JournalApplied Catalysis A: General
Volume596
DOIs
Publication statusPublished - 25 Apr 2020

Keywords

  • Methanol conversion
  • Product distribution
  • SAPO-34 zeolite
  • Surface methoxy surface
  • Synchrotron X-ray powder diffraction

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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