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

doi:10.1007/BF00811705

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

School of Chemistry

Research output: Contribution to journal › Article › peer-review

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 language	English
Pages (from-to)	13-16
Number of pages	4
Journal	Catalysis Letters
Volume	41
Issue number	1-2
DOIs	https://doi.org/10.1007/BF00811705
Publication status	Published - Sept 1996

Keywords

Acid site
Active site
Microporous catalyst
Solid acid

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10.1007/BF00811705

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

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 Br{\o}nsted 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 {\AA}) exhibit greater acidity than those attached to O(2) (OH distance 0.91 {\AA}).",

keywords = "Acid site, Active site, Microporous catalyst, Solid acid",

author = "Cheetham, {A. K.} and L. Marchese and Wright, {P. A.} and J. Chen",

year = "1996",

month = sep,

doi = "10.1007/BF00811705",

language = "English",

volume = "41",

pages = "13--16",

journal = "Catalysis Letters",

issn = "1011-372X",

publisher = "Springer",

number = "1-2",

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T1 - A quantitative description of the active sites in the dehydrated acid catalyst HSAPO-34 for the conversion of methanol to olefins

AU - Cheetham, A. K.

AU - Marchese, L.

AU - Wright, P. A.

AU - Chen, J.

PY - 1996/9

Y1 - 1996/9

N2 - 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).

AB - 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).

KW - Acid site

KW - Active site

KW - Microporous catalyst

KW - Solid acid

UR - http://www.scopus.com/inward/record.url?scp=0001926097&partnerID=8YFLogxK

U2 - 10.1007/BF00811705

DO - 10.1007/BF00811705

M3 - Article

AN - SCOPUS:0001926097

SN - 1011-372X

VL - 41

SP - 13

EP - 16

JO - Catalysis Letters

JF - Catalysis Letters

IS - 1-2

ER -

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

Abstract

Keywords

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