Promoting effect of Zr on the catalytic combustion of methane over Pd/γ-Al2O3 catalyst

被引：10

作者：

Na, Hongbo ^{[1
]}

Zhu, Tianle ^{[1
]}

Liu, Zhiming ^{[2
]}

Sun, Yifei ^{[1
]}

机构：

[1] Beihang Univ, Minist Educ, Sch Chem & Environm, Key Lab Bioinspired Smart Interfacial Sci & Techn, Beijing 100191, Peoples R China

[2] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

来源：

FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING | 2014年 / 8卷 / 05期

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

Pd-Zr/Al2O3; methane; catalytic combustion; catalyst regeneration; LOW-TEMPERATURE; PD CATALYSTS; COMPLETE OXIDATION; PALLADIUM; BEHAVIOR; ALUMINA; SUPPORT; REACTIVITY; PD/AL2O3;

D O I：

10.1007/s11783-013-0613-1

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The effect of Zr on the catalytic performance of Pd/gamma-Al2O3 for the methane combustion was investigated. The results show that the addition of Zr can improve the activity and stability of Pd/gamma-Al2O3 catalyst, which, based on the catalyst characterization (N-2 adsorption, XRD, CO-Chemisorption, XPS, CH4-TPR and O-2-TPO), is ascribed to the interaction between Pd and Zr. The active phase of methane combustion over supported palladium catalyst is the Pd-0/Pd2+ mixture. Zr addition inhibits Pd aggregation and enhances the redox properties of active phase Pd-0/Pd2+. H-2 reduction could effectively reduce the oxidation degree of Pd species and regenerate the active sites (Pd-0/Pd2+).

引用

页码：659 / 665

页数：7

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