High temperature treated Pt/Sn ZnAl2O4 catalysts

P. Bosch; M. A. Valenzuela; B. Zapata; D. Acosta; G. Aguilar-Ríos; C. Maldonado; I. Schifter

doi:10.1016/0304-5102(94)00095-6

High temperature treated Pt/Sn ZnAl₂O₄ catalysts

P. Bosch, M. A. Valenzuela, B. Zapata, D. Acosta, G. Aguilar-Ríos, C. Maldonado, I. Schifter

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23 Scopus citations

Abstract

SnZnAl₂O₄ mixed supports were prepared by coprecipitation method with Sn contents of 0.5, 1.6 and 3 wt.%. Later Pt (1 wt.%) was incorporated by impregnation and samples reduced in hydrogen at 823 and 1073 K. Chemisorption data showed a decrease in hydrogen as temperature increases which is attributed to PtSn alloy formation. Catalytic activity in isobutane dehydrogenation and n-heptane dehydrocyclization seems to be dependent on the amount of metallic Pt phase. Pt/SnZnAl₂O₄ catalysts were thermally more stable than Pt/ZnAl₂O₄ preparation. Tin alters the ZnAl₂O₄ properties towards a higher thermal stability, but if added in more than 1 wt.%, it alloys with platinum inhibiting catalytic performance.

Original language	English
Pages (from-to)	67-78
Number of pages	12
Journal	Journal of Molecular Catalysis
Volume	93
Issue number	1
DOIs	https://doi.org/10.1016/0304-5102(94)00095-6
State	Published - 27 Sep 1994
Externally published	Yes

Keywords

Aluminate
Dehydrogenation
High temperature treatment
Platinum
Tin
Zinc

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10.1016/0304-5102(94)00095-6

Cite this

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title = "High temperature treated Pt/Sn ZnAl2O4 catalysts",

abstract = "SnZnAl2O4 mixed supports were prepared by coprecipitation method with Sn contents of 0.5, 1.6 and 3 wt.%. Later Pt (1 wt.%) was incorporated by impregnation and samples reduced in hydrogen at 823 and 1073 K. Chemisorption data showed a decrease in hydrogen as temperature increases which is attributed to PtSn alloy formation. Catalytic activity in isobutane dehydrogenation and n-heptane dehydrocyclization seems to be dependent on the amount of metallic Pt phase. Pt/SnZnAl2O4 catalysts were thermally more stable than Pt/ZnAl2O4 preparation. Tin alters the ZnAl2O4 properties towards a higher thermal stability, but if added in more than 1 wt.%, it alloys with platinum inhibiting catalytic performance.",

keywords = "Aluminate, Dehydrogenation, High temperature treatment, Platinum, Tin, Zinc",

author = "P. Bosch and Valenzuela, {M. A.} and B. Zapata and D. Acosta and G. Aguilar-R{\'i}os and C. Maldonado and I. Schifter",

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T1 - High temperature treated Pt/Sn ZnAl2O4 catalysts

AU - Bosch, P.

AU - Valenzuela, M. A.

AU - Zapata, B.

AU - Acosta, D.

AU - Aguilar-Ríos, G.

AU - Maldonado, C.

AU - Schifter, I.

PY - 1994/9/27

Y1 - 1994/9/27

N2 - SnZnAl2O4 mixed supports were prepared by coprecipitation method with Sn contents of 0.5, 1.6 and 3 wt.%. Later Pt (1 wt.%) was incorporated by impregnation and samples reduced in hydrogen at 823 and 1073 K. Chemisorption data showed a decrease in hydrogen as temperature increases which is attributed to PtSn alloy formation. Catalytic activity in isobutane dehydrogenation and n-heptane dehydrocyclization seems to be dependent on the amount of metallic Pt phase. Pt/SnZnAl2O4 catalysts were thermally more stable than Pt/ZnAl2O4 preparation. Tin alters the ZnAl2O4 properties towards a higher thermal stability, but if added in more than 1 wt.%, it alloys with platinum inhibiting catalytic performance.

AB - SnZnAl2O4 mixed supports were prepared by coprecipitation method with Sn contents of 0.5, 1.6 and 3 wt.%. Later Pt (1 wt.%) was incorporated by impregnation and samples reduced in hydrogen at 823 and 1073 K. Chemisorption data showed a decrease in hydrogen as temperature increases which is attributed to PtSn alloy formation. Catalytic activity in isobutane dehydrogenation and n-heptane dehydrocyclization seems to be dependent on the amount of metallic Pt phase. Pt/SnZnAl2O4 catalysts were thermally more stable than Pt/ZnAl2O4 preparation. Tin alters the ZnAl2O4 properties towards a higher thermal stability, but if added in more than 1 wt.%, it alloys with platinum inhibiting catalytic performance.

KW - Aluminate

KW - Dehydrogenation

KW - High temperature treatment

KW - Platinum

KW - Tin

KW - Zinc

UR - http://www.scopus.com/inward/record.url?scp=0028498142&partnerID=8YFLogxK

U2 - 10.1016/0304-5102(94)00095-6

DO - 10.1016/0304-5102(94)00095-6

M3 - Artículo

SN - 0304-5102

VL - 93

SP - 67

EP - 78

JO - Journal of Molecular Catalysis

JF - Journal of Molecular Catalysis

IS - 1

ER -

High temperature treated Pt/Sn ZnAl₂O₄ catalysts

Abstract

Keywords

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