Propane dehydrogenation activity of Pt and Pt-Sn catalysts supported on magnesium aluminate:: influence of steam and hydrogen

被引：39

作者：

Aguilar-Ríos, G ^{[1
]}

Salas, P

Valenzuela, MA

Armendáriz, H

Wang, JA

Salmones, J

机构：

[1] Inst Politecn Nacl, ESIQIE, UPALM, Mexico City 07738, DF, Mexico

[2] Inst Mexicano Petr, Mexico City 07730, DF, Mexico

来源：

CATALYSIS LETTERS | 1999年 / 60卷 / 1-2期

关键词：

platinum; platinum-tin; magnesium aluminate spinel; propane dehydrogenation activity;

D O I：

10.1023/A:1019086419498

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Propane dehydrogenation was carried out in hydrogen and steam as reaction media on Pt/MgAl2O4 and Pt-Sn/ MgAl2O4 catalysts. A wide range of Pt and Pt-Sn concentrations was explored. Monometallic Pt catalysts were completely poisoned by steam. Concerning bimetallic Pt-Sn catalysts, tin played an important role related to the activation of platinum particles when the reaction was carried out in steam. On the other hand, tin inhibited cracking reactions leading to an increase of catalysts stability. Activation energy in hydrogen was the same for monometallic and bimetallic catalysts: 22 kcal/mol; while for the reaction in steam, values ranging from 10 to 15 kcal/mol were obtained.

引用

页码：21 / 25

页数：5

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