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.
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页码：23 / 31
页数：9
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