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

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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).

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Author notes

  1. L. Marchese

    Present address: Dipartimento di Chimica IFM, Università degli Studi di Torino, 10125, Turin, Italy

  2. P. A. Wright

    Present address: Department of Chemistry, University of St. Andrews, St. Andrews, Scotland, UK

  3. J. Chen

    Present address: Department of Chemistry, Jilin University, Changchun, PR China

Authors and Affiliations

  1. Materials Research Laboratory, University of California, 93106, Santa Barbara, CA, USA

    L. Smith & A. K. Cheetham

  2. Davy Faraday Research Laboratory, Royal Institution of Great Britain, 21 Albemarle Street, W1X4BS, London, UK

    L. Marchese, J. M. Thomas, P. A. Wright & J. Chen

  3. Dipartimento di Chimica IFM, Universita degli Studi di Torino, 10125, Turin, Italy

    E. Gianotti

Authors
  1. L. Smith
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  2. A. K. Cheetham
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  3. L. Marchese
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  4. J. M. Thomas
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  7. E. Gianotti
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Smith, L., Cheetham, A.K., Marchese, L. et al. A quantitative description of the active sites in the dehydrated acid catalyst HSAPO-34 for the conversion of methanol to olefins. Catal Lett 41, 13–16 (1996). https://doi.org/10.1007/BF00811705

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  • DOI: https://doi.org/10.1007/BF00811705

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