Yttria-stabilized zirconia supported platinum catalysts (Pt/YSZs) for CH4/CO2 reforming

被引：40

作者：

Chen, YZ ^{[1
]}

Liaw, BJ

Kao, CF

Kuo, JC

机构：

[1] Natl Cent Univ, Dept Chem Engn, Chungli 32054, Taiwan

[2] Nanya Inst Technol, Dept Chem Engn, Chungli 32049, Taiwan

来源：

APPLIED CATALYSIS A-GENERAL | 2001年 / 217卷 / 1-2期

关键词：

Pt/YSZ; yttria-stabilized zirconia; CH4/CO2; reforming; TPR; pulsing test;

D O I：

10.1016/S0926-860X(01)00592-0

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：

Yttria-stabilized zirconia (YSZs) samples with various amounts of yttrium were prepared, characterized, and used as supports for preparing Pt/YSZ catalysts. CH4/CO2 reforming over the Pt/YSZ catalysts was examined and compared with the results over Pt/Al2O3 and Pt/SiO2 catalysts. Analysis of TPR revealed that the reduction temperature range of the Pt/YSZ catalysts was much lower than that of the Pt/Al2O3 and Pt/SiO2 catalysts. For CH4/CO2 reforming at 600 degreesC, the Pt/YSZ catalysts showed a higher steady state conversion and significantly better stability than the Pt/Al2O3 and Pt/SiO2 catalysts. These results were attributed to the enhancing of adsorption, activation and dissociation of CO2 on the YSZ. The optimum dosage of yttrium in YSZ for the CH4/CO2 reforming reaction was 9.8 mol% (Y/(Zr + Y)). Additionally, YSZ(9.8) could be homogeneously spread on the SiO2 and was more stable than the YSZ(9.8) for the CH4/CO2 reforming at temperatures above 700 degreesC. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：23 / 31

页数：9

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