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

doi:10.1016/j.apcata.2020.117528

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 publication › Journal article › Academic research › peer-review

5 Citations (Scopus)

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 language	English
Article number	117528
Journal	Applied Catalysis A: General
Volume	596
DOIs	https://doi.org/10.1016/j.apcata.2020.117528
Publication status	Published - 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

More information

10.1016/j.apcata.2020.117528

http://hdl.handle.net/10397/89336

Cite this

@article{b3f674a2c0874ecd8b70f453bd623968,

title = "Evaluation of Br{\o}nsted and Lewis acid sites in H-ZSM-5 and H-USY with or without metal modification using probe molecule-synchrotron X-ray powder diffraction",

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 Br{\o}nsted 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.",

keywords = "Methanol conversion, Product distribution, SAPO-34 zeolite, Surface methoxy surface, Synchrotron X-ray powder diffraction",

author = "Lo, \{Benedict T.W.\} and Lin, \{Wei che\} and Li, \{Molly Meng Jung\} and Sarah Day and Chiu Tang and Tsang, \{Shik Chi Edman\}",

note = "The authors wish to thank the Hong Kong University Grants Committee (Early Career Scheme, Grant number: 25300918) for financial support of this collaborative work. We also acknowledge Beamline I11 at Diamond Light Source and Beamline BL02B2 at SPring-8 (Proposal number: 2018B1081) to offer beamtime.",

year = "2020",

month = apr,

day = "25",

doi = "10.1016/j.apcata.2020.117528",

language = "English",

volume = "596",

journal = "Applied Catalysis A: General",

issn = "0926-860X",

publisher = "Elsevier B.V.",

}

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. / Lo, Benedict T.W.; Lin, Wei che; Li, Molly Meng Jung et al.
In: Applied Catalysis A: General, Vol. 596, 117528, 25.04.2020.

Research output: Journal article publication › Journal article › Academic research › peer-review

TY - JOUR

T1 - 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

AU - Lo, Benedict T.W.

AU - Lin, Wei che

AU - Li, Molly Meng Jung

AU - Day, Sarah

AU - Tang, Chiu

AU - Tsang, Shik Chi Edman

N1 - The authors wish to thank the Hong Kong University Grants Committee (Early Career Scheme, Grant number: 25300918) for financial support of this collaborative work. We also acknowledge Beamline I11 at Diamond Light Source and Beamline BL02B2 at SPring-8 (Proposal number: 2018B1081) to offer beamtime.

PY - 2020/4/25

Y1 - 2020/4/25

N2 - 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.

AB - 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.

KW - Methanol conversion

KW - Product distribution

KW - SAPO-34 zeolite

KW - Surface methoxy surface

KW - Synchrotron X-ray powder diffraction

UR - https://www.scopus.com/pages/publications/85082406885

U2 - 10.1016/j.apcata.2020.117528

DO - 10.1016/j.apcata.2020.117528

M3 - Journal article

AN - SCOPUS:85082406885

SN - 0926-860X

VL - 596

JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

M1 - 117528

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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