ROLE OF TUNGSTEN IN SUPPORTED PT-W REFORMING CATALYSTS .1. MODIFICATION OF PLATINUM ACTIVITY AND SELECTIVITY BY ADDITION OF TUNGSTEN

被引：11

作者：

MBOUNGOU, JS ^{[1
]}

SCHMITT, JL ^{[1
]}

MAIRE, G ^{[1
]}

GARIN, F ^{[1
]}

机构：

[1] UNIV STRASBOURG 1,INST LE BEL,CATALYSE & CHIM SURFACES LAB,4 RUE BLAISE PASCAL,F-67070 STRASBOURG,FRANCE

来源：

CATALYSIS LETTERS | 1991年 / 10卷 / 5-6期

关键词：

PLATINUM; SUPPORTED BIMETALLIC PT-W CATALYSTS; 3-METHYLHEXANE REFORMING;

D O I：

10.1007/BF00769174

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 [物理化学]; 081704 [应用化学];

摘要：

Bimetallic supported Pt-W catalysts are studied for 3-methylhexane reforming. An increase in the activity and selectivity in aromatization is found for Pt-low W/Al2O3 catalysts compared to the classical monometallic Pt/Al2O3 catalyst. Changes in activity and selectivity, for bimetallic catalysts, are attributed to "tungsten moderator interaction" effects between platinum and support which modify the metallic particle sizes. These changes are observed on Pt-high W/Al2O3 and Pt-W/SiO2 catalysts. Superficial carbide formation and modification of the hydrogen chemisorption may be proposed to explain the reactivity of Pt-W catalysts under low hydrogen pressure.

引用

页码：391 / 400

页数：10

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