The role of support and promoter on the oxidation of sulfur dioxide using platinum based catalysts

被引：21
|
作者：
Koutsopoulos, Sotirios
Rasmussen, Soren B.
Eriksen, K. Michael
Fehrmann, Ramus
机构：
[1] Tech Univ Denmark, Dept Chem, DK-2800 Lyngby, Denmark
[2] ICAT, Interdisciplinary Res Ctr Catalysis, DK-2800 Lyngby, Denmark
来源：
APPLIED CATALYSIS A-GENERAL | 2006年 / 306卷
关键词：
silica; titania; platinum; palladium; rhodium; catalyst; sulphur dioxide oxidation;
D O I：
10.1016/j.apcata.2006.03.041
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：
The catalytic oxidation of SO2 to SO3 was studied over platinum based catalysts in the absence and the presence of dopants. The active metal was supported on silica gel or titania (anatase) by impregnation. The activities of the silica supported catalysts were found to follow the order PtRh/SiO2 > Pt/SiO2 > Pt-Al/SiO2. For the samples supported on titania the respective order was Pt/TiO2 > Pt-Rh/TiO2 > Pt-Al/TiO2. The size of the particles of the active phase, the presence of dopants and the purity of the catalyst were found to affect the catalytic performance. A careful selection of the pH of the impregnation solution and of the reduction temperature of the precursor salts resulted in a very active catalyst with average particle size of 1.7 nm. (c) 2006 Elsevier B.V. All rights reserved.
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页码：142 / 148
页数：7
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