A quantitative description of the active sites in the dehydrated acid catalyst HSAPO-34 for the conversion of methanol to olefins

A. K. Cheetham*, L. Marchese, P. A. Wright, J. Chen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

96 Citations (Scopus)

Abstract

A neutron diffraction study of the deuterated form of a microcrystalline specimen of the H+SAPO-34 catalyst for converting methanol to light olefins reveals two distinct bridging hydroxyl Brønsted sites. These sites are also identified by IR spectroscopy which distinguishes their acid strength from the shift in O-H frequencies following adsorption of CO at 77 K. Protons attached to the O(4) bridging oxygen (OH distance 0.95 Å) exhibit greater acidity than those attached to O(2) (OH distance 0.91 Å).

Original languageEnglish
Pages (from-to)13-16
Number of pages4
JournalCatalysis Letters
Volume41
Issue number1-2
DOIs
Publication statusPublished - Sept 1996

Keywords

  • Acid site
  • Active site
  • Microporous catalyst
  • Solid acid

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