Propane oxidation on Pt-WO3/γ-Al2O3 catalytic systems

被引：4

作者：

da Silva, MAP

Cardoso, RM

Schmal, M ^{[1
]}

机构：

[1] Univ Fed Rio de Janeiro, Escola Quim, BR-21941 Rio De Janeiro, Brazil

[2] Univ Fed Rio de Janeiro, COPPE, NUCAT, PEQ, BR-21945970 Rio De Janeiro, Brazil

来源：

BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING | 2003年 / 20卷 / 01期

关键词：

platinum-tungsten catalysts; automotive catalysts; propane oxidation;

D O I：

10.1590/S0104-66322003000100010

中图分类号：

TQ [化学工业];

学科分类号：

0817 [化学工程与技术];

摘要：

The oxidation of propane on Pt-xWO(3)/Al2O3 catalysts was studied by varying the concentration of tungsten sublayer. Thermal analysis and XRD in situ showed that enrichment of tungsten at the surface is associated with the formation of HxWO3 bronze. FTIR results with C3H8 and O-2 indicated that the catalyst surface properties and the interaction between W and Pt were modified. These modified surface complexes prevented the formation of acetates and formate species. The addition of W increased the activity of Pt/Al2O3 in CA oxidation. Tungsten was the main responsible for the stability of the bimetallic catalysts in the presence of water.

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收藏

页码：51 / 56

页数：6

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