Effects of Ce on catalytic combustion of methane over Pd-Pt/Al2O3 catalyst

被引：33

作者：

Fan, Xing ^{[1
]}

Wang, Fan ^{[1
]}

Zhu, Tianle ^{[1
]}

He, Hong ^{[2
]}

机构：

[1] Beihang Univ, Sch Chem & Environm, Beijing 100191, Peoples R China

[2] Beijing Univ Technol, Coll Environm & Energy Engn, Beijing 100124, Peoples R China

来源：

JOURNAL OF ENVIRONMENTAL SCIENCES | 2012年 / 24卷 / 03期

关键词：

catalytic combustion; methane; Pd-Pt/Ce/Al2O3; catalyst; stability; metal dispersion; PD-PT CATALYSTS; TEMPERATURE COMBUSTION; PD/AL2O3; CATALYSTS; OXIDATION; BEHAVIOR; PDO/AL2O3; CH4; PT-CENTER-DOT-PDO/AL2O3; STABILIZATION; DEACTIVATION;

D O I：

10.1016/S1001-0742(11)60798-5

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Activity and stability of 1%Pd-0.2%Pt/Al2O3 and 1%Pd-0.2%Pt/0.6%Ce/Al2O3 catalysts prepared by impregnation method for catalytic combustion of methane in air were investigated. The catalysts before and after reaction were characterized by BET, CO chemisorption, XRD and XPS techniques. Results showed that the presence of Ce significantly increased the activity and thermal stability of the Pd-Pt/Al2O3 catalyst towards methane combustion, which could be attributed to more highly-dispersed active PdO particles over the Pd-Pt/Ce/Al2O3 catalyst surface as well as the retarded sintering of PdO and the maintained oxidized state of surface Pd during the combustion process in the presence of Ce.

引用

页码：507 / 511

页数：5

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