Sulfur-tolerant Pt-supported zeolite catalysts for benzene hydrogenation: I. Influence of the support

L. J. Simon; J. G. Van Ommen; A. Jentys; Johannes A. Lercher

doi:10.1006/jcat.2001.3236

Sulfur-tolerant Pt-supported zeolite catalysts for benzene hydrogenation: I. Influence of the support

L. J. Simon, J. G. Van Ommen, A. Jentys, Johannes A. Lercher

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Abstract

Benzene hydrogenation was investigated over a series of Pt-supported MOR and LTL zeolites in the presence of varying thiophene concentrations. Higher activity and a higher sulfur resistance were observed for Pt supported on partially alkali-exchanged zeolites compared to completely alkali-exchanged and purely acidic zeolites. This is attributed to the contribution of catalytically active sites on the metal and on Brønsted acid sites in the vicinity or at the perimeter of the metal particles. Increasing temperature and hydrogen partial pressure increased the sulfur tolerance of the catalysts. Although the deactivation of Pt by thiophene during benzene hydrogenation was higher for Pt/KH-LTL compared to Pt/NaH-MOR, the higher overall hydrogenation activity for benzene in the presence of thiophene was observed for Pt/KH-LTL. This is attributed to the high Pt dispersion and the closer vicinity of Pt and Si(OH)Al groups in LTL. As a consequence, the benzene hydrogenation route on Brønsted acid sites with spillover of hydrogen from Pt is more effective on Pt/KH-LTL than on Pt/NaH-MOR.

Original language	English
Article number	93236
Pages (from-to)	60-69
Number of pages	10
Journal	Journal of Catalysis
Volume	201
Issue number	1
DOIs	https://doi.org/10.1006/jcat.2001.3236
State	Published - 2001

Keywords

Acid sites
Benzene hydrogenation
High pressure
LTL
Noble metal
Sulfur tolerance

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@article{2736bada3e0c40dc9cf10f15ded04c3f,

title = "Sulfur-tolerant Pt-supported zeolite catalysts for benzene hydrogenation: I. Influence of the support",

abstract = "Benzene hydrogenation was investigated over a series of Pt-supported MOR and LTL zeolites in the presence of varying thiophene concentrations. Higher activity and a higher sulfur resistance were observed for Pt supported on partially alkali-exchanged zeolites compared to completely alkali-exchanged and purely acidic zeolites. This is attributed to the contribution of catalytically active sites on the metal and on Br{\o}nsted acid sites in the vicinity or at the perimeter of the metal particles. Increasing temperature and hydrogen partial pressure increased the sulfur tolerance of the catalysts. Although the deactivation of Pt by thiophene during benzene hydrogenation was higher for Pt/KH-LTL compared to Pt/NaH-MOR, the higher overall hydrogenation activity for benzene in the presence of thiophene was observed for Pt/KH-LTL. This is attributed to the high Pt dispersion and the closer vicinity of Pt and Si(OH)Al groups in LTL. As a consequence, the benzene hydrogenation route on Br{\o}nsted acid sites with spillover of hydrogen from Pt is more effective on Pt/KH-LTL than on Pt/NaH-MOR.",

keywords = "Acid sites, Benzene hydrogenation, High pressure, LTL, Noble metal, Sulfur tolerance",

author = "Simon, {L. J.} and {Van Ommen}, {J. G.} and A. Jentys and Lercher, {Johannes A.}",

note = "Funding Information: This work was performed under the auspices of NIOK, The Netherlands Institute of Catalysis Research. It was supported by STW/NWO, The Netherlands, under Project Number 349-3787. XAFS experiments were carried out on beamline X1 at HASYLAB, Hamburg, Germany, which is supported by the TMR-Contract ERBFMGECT950059 of the European Community and on beamline B-2 at Cornell High Energy Synchrotron Source, Ithaca, New York, which is supported by the National Science Foundation under Award DMR 97-13424. HRTEM pictures were taken by Dr. P. J. Kooyman, National Center for HREM, Delft, The Netherlands.",

year = "2001",

doi = "10.1006/jcat.2001.3236",

language = "English",

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pages = "60--69",

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T1 - Sulfur-tolerant Pt-supported zeolite catalysts for benzene hydrogenation

T2 - I. Influence of the support

AU - Simon, L. J.

AU - Van Ommen, J. G.

AU - Jentys, A.

AU - Lercher, Johannes A.

N1 - Funding Information: This work was performed under the auspices of NIOK, The Netherlands Institute of Catalysis Research. It was supported by STW/NWO, The Netherlands, under Project Number 349-3787. XAFS experiments were carried out on beamline X1 at HASYLAB, Hamburg, Germany, which is supported by the TMR-Contract ERBFMGECT950059 of the European Community and on beamline B-2 at Cornell High Energy Synchrotron Source, Ithaca, New York, which is supported by the National Science Foundation under Award DMR 97-13424. HRTEM pictures were taken by Dr. P. J. Kooyman, National Center for HREM, Delft, The Netherlands.

PY - 2001

Y1 - 2001

N2 - Benzene hydrogenation was investigated over a series of Pt-supported MOR and LTL zeolites in the presence of varying thiophene concentrations. Higher activity and a higher sulfur resistance were observed for Pt supported on partially alkali-exchanged zeolites compared to completely alkali-exchanged and purely acidic zeolites. This is attributed to the contribution of catalytically active sites on the metal and on Brønsted acid sites in the vicinity or at the perimeter of the metal particles. Increasing temperature and hydrogen partial pressure increased the sulfur tolerance of the catalysts. Although the deactivation of Pt by thiophene during benzene hydrogenation was higher for Pt/KH-LTL compared to Pt/NaH-MOR, the higher overall hydrogenation activity for benzene in the presence of thiophene was observed for Pt/KH-LTL. This is attributed to the high Pt dispersion and the closer vicinity of Pt and Si(OH)Al groups in LTL. As a consequence, the benzene hydrogenation route on Brønsted acid sites with spillover of hydrogen from Pt is more effective on Pt/KH-LTL than on Pt/NaH-MOR.

AB - Benzene hydrogenation was investigated over a series of Pt-supported MOR and LTL zeolites in the presence of varying thiophene concentrations. Higher activity and a higher sulfur resistance were observed for Pt supported on partially alkali-exchanged zeolites compared to completely alkali-exchanged and purely acidic zeolites. This is attributed to the contribution of catalytically active sites on the metal and on Brønsted acid sites in the vicinity or at the perimeter of the metal particles. Increasing temperature and hydrogen partial pressure increased the sulfur tolerance of the catalysts. Although the deactivation of Pt by thiophene during benzene hydrogenation was higher for Pt/KH-LTL compared to Pt/NaH-MOR, the higher overall hydrogenation activity for benzene in the presence of thiophene was observed for Pt/KH-LTL. This is attributed to the high Pt dispersion and the closer vicinity of Pt and Si(OH)Al groups in LTL. As a consequence, the benzene hydrogenation route on Brønsted acid sites with spillover of hydrogen from Pt is more effective on Pt/KH-LTL than on Pt/NaH-MOR.

KW - Acid sites

KW - Benzene hydrogenation

KW - High pressure

KW - LTL

KW - Noble metal

KW - Sulfur tolerance

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DO - 10.1006/jcat.2001.3236

M3 - Article

AN - SCOPUS:0035743378

SN - 0021-9517

VL - 201

SP - 60

EP - 69

JO - Journal of Catalysis

JF - Journal of Catalysis

IS - 1

M1 - 93236

ER -

Sulfur-tolerant Pt-supported zeolite catalysts for benzene hydrogenation: I. Influence of the support

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Keywords

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