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：
中国国家自然科学基金; 国家高技术研究发展计划(863计划);
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
收藏
页码：659 / 665
页数：7
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