A study of platinum supported on tungstated zirconia catalysts

Gustavo Larsen; Edgar Lotero; Srinivasanallur Raghavan; Rubén D. Parra; Carlos A. Querini

doi:10.1016/0926-860X(95)00330-4

A study of platinum supported on tungstated zirconia catalysts

Gustavo Larsen, Edgar Lotero, Srinivasanallur Raghavan, Rubén D. Parra, Carlos A. Querini

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

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Abstract

The reaction of n-butane with hydrogen at 573 K was studied over platinum supported on tungstated zirconia (PtWZ). A higher Pt dispersion increases the selectivity toward hydrogenolysis products and overall activity. The % coke after 90 min on stream at a H₂/n-C₄ ratio of 3 was found to be less than 0.1 wt.-% in all cases. The presence of Brønsted acid sites upon reduction is confirmed by diffuse reflectance infrared spectroscopy of adsorbed pyridine. The WO₃/ZrO₂ (WZ) support consists of a mixture of tetragonal and monoclinic zirconia and tetragonal tungsten oxide regardless of the presence of platinum.

Original language	English (US)
Pages (from-to)	201-211
Number of pages	11
Journal	Applied Catalysis A: General
Volume	139
Issue number	1-2
DOIs	https://doi.org/10.1016/0926-860X(95)00330-4
State	Published - Jun 6 1996

Keywords

Platinum supported on tungsta-zirconia
Pyridine adsorption
Temperature-programmed oxidation
n-Butane isomerization

ASJC Scopus subject areas

Catalysis
Process Chemistry and Technology

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10.1016/0926-860X(95)00330-4

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title = "A study of platinum supported on tungstated zirconia catalysts",

abstract = "The reaction of n-butane with hydrogen at 573 K was studied over platinum supported on tungstated zirconia (PtWZ). A higher Pt dispersion increases the selectivity toward hydrogenolysis products and overall activity. The % coke after 90 min on stream at a H2/n-C4 ratio of 3 was found to be less than 0.1 wt.-% in all cases. The presence of Br{\o}nsted acid sites upon reduction is confirmed by diffuse reflectance infrared spectroscopy of adsorbed pyridine. The WO3/ZrO2 (WZ) support consists of a mixture of tetragonal and monoclinic zirconia and tetragonal tungsten oxide regardless of the presence of platinum.",

keywords = "Platinum supported on tungsta-zirconia, Pyridine adsorption, Temperature-programmed oxidation, n-Butane isomerization",

author = "Gustavo Larsen and Edgar Lotero and Srinivasanallur Raghavan and Parra, {Rub{\'e}n D.} and Querini, {Carlos A.}",

note = "Funding Information: This researchw as supporteidn part by the NSF-CONICET (Argentinaj)o int program(g rant# INT-9415590a) ndby the AmericanC hemicaSl ociety( Petroleum ResearchF und, grant # 28336-G5).S upportf rom the ResearchC ouncil and the LaymanF undof the Universityo f Nebraskais also acknowledged.",

year = "1996",

month = jun,

day = "6",

doi = "10.1016/0926-860X(95)00330-4",

language = "English (US)",

volume = "139",

pages = "201--211",

journal = "Applied Catalysis A: General",

issn = "0926-860X",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - A study of platinum supported on tungstated zirconia catalysts

AU - Larsen, Gustavo

AU - Lotero, Edgar

AU - Raghavan, Srinivasanallur

AU - Parra, Rubén D.

AU - Querini, Carlos A.

N1 - Funding Information: This researchw as supporteidn part by the NSF-CONICET (Argentinaj)o int program(g rant# INT-9415590a) ndby the AmericanC hemicaSl ociety( Petroleum ResearchF und, grant # 28336-G5).S upportf rom the ResearchC ouncil and the LaymanF undof the Universityo f Nebraskais also acknowledged.

PY - 1996/6/6

Y1 - 1996/6/6

N2 - The reaction of n-butane with hydrogen at 573 K was studied over platinum supported on tungstated zirconia (PtWZ). A higher Pt dispersion increases the selectivity toward hydrogenolysis products and overall activity. The % coke after 90 min on stream at a H2/n-C4 ratio of 3 was found to be less than 0.1 wt.-% in all cases. The presence of Brønsted acid sites upon reduction is confirmed by diffuse reflectance infrared spectroscopy of adsorbed pyridine. The WO3/ZrO2 (WZ) support consists of a mixture of tetragonal and monoclinic zirconia and tetragonal tungsten oxide regardless of the presence of platinum.

AB - The reaction of n-butane with hydrogen at 573 K was studied over platinum supported on tungstated zirconia (PtWZ). A higher Pt dispersion increases the selectivity toward hydrogenolysis products and overall activity. The % coke after 90 min on stream at a H2/n-C4 ratio of 3 was found to be less than 0.1 wt.-% in all cases. The presence of Brønsted acid sites upon reduction is confirmed by diffuse reflectance infrared spectroscopy of adsorbed pyridine. The WO3/ZrO2 (WZ) support consists of a mixture of tetragonal and monoclinic zirconia and tetragonal tungsten oxide regardless of the presence of platinum.

KW - Platinum supported on tungsta-zirconia

KW - Pyridine adsorption

KW - Temperature-programmed oxidation

KW - n-Butane isomerization

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U2 - 10.1016/0926-860X(95)00330-4

DO - 10.1016/0926-860X(95)00330-4

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JO - Applied Catalysis A: General

JF - Applied Catalysis A: General

IS - 1-2

ER -

A study of platinum supported on tungstated zirconia catalysts

Abstract

Keywords

ASJC Scopus subject areas

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