Effect of transition metal additives on composite cobalt catalyst for NO x reduction with CH4

被引：1
|
作者：
Chen, Jiaqi [1 ,2 ]
Chen, Shuwei [1 ,2 ]
Li, Ruifeng [1 ,2 ]
Zheng, Jiajun [1 ,2 ]
机构：
[1] Taiyuan Univ Technol, Res Ctr Energy Chem & Catalyt Technol, Taiyuan 030024, Peoples R China
[2] Taiyuan Univ Technol, Coll Chem & Chem Engn, Taiyuan 030024, Peoples R China
来源：
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A | 2014年 / 88卷 / 07期
基金：
美国国家科学基金会;
关键词：
NO reduction; cobalt; zinc; BZZ; BMZ; cooperative effect; NITROGEN-OXIDES; CO; ZEOLITES; SCR; METHANE; PD; DURABILITY; LOCATION; SITES; FTIR;
D O I：
10.1134/S0036024414070206
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：
The CoH-BZZ and CoH-BMZ catalysts have good catalytic activity in the selective catalytic reduction of NO (NO-SCR) by methane, but have less selectivity at the reaction temperatures above 600A degrees C. It was found that the addition of different transition metals to CoH-BZZ took different effect on SCR of NO by methane. Besides, Zn additives improved effectively the selectivity of methane towards NOx reduction. The nature of the active sites is characterized by diffuse reflectance H-2-TPR and XPS. These techniques show that in both CoZn-BZZ and CoZn-BMZ catalysts the cobalt is present as mononuclear Co2+ species, and the bind energy also decreased compared with CoH-composites (-BZZ and -BMZ). Reactivity of both CoZn-BZZ and CoZn-BMZ is much higher than that found on Co based catalysts in temperature range between 500 and 650 degrees C.
引用
收藏
页码：1103 / 1112
页数：10
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