A study on N2O catalytic decomposition over Co/MgO catalysts

被引：66

作者：

Shen, Qun ^{[1
]}

Li, Landong ^{[1
]}

Li, Jinjun ^{[1
]}

Tian, Hua ^{[1
]}

Hao, Zhengping ^{[1
]}

机构：

[1] Chinese Acad Sci, Dept Environm Nanomat, Ecoenvironm Sci Res Ctr, Beijing 100085, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2009年 / 163卷 / 2-3期

基金：

中国国家自然科学基金;

关键词：

Co/MgO; N2O decomposition; Control of greenhouse gas; HYDROTALCITE-LIKE PRECURSORS; NITROUS-OXIDE; METAL-OXIDES; MIXED OXIDES; FE; ZEOLITES;

D O I：

10.1016/j.jhazmat.2008.07.104

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Different oxide supported cobalt catalysts were prepared by co-precipitation method and tested for the decomposition of nitrous oxide. Co/MgO with cobalt loading of 15% showed the best activity and a 100% N2O conversion was obtained at temperatures higher than 700 K. The active phase of cobalt species in Co/MgO catalysts was Co3O4 highly dispersed in the matrices of MgO, based on XRD and XPS results as well as the kinetic analysis. The existence of NO, O-2 and H2O in reaction system showed different negative effects on N2O decomposition. Nevertheless, a 100% N2O conversion could be achieved at 800 K under simulated conditions of tail gas from nitric acid plant. Moreover, Co/MgO catalyst exhibited quite good durability and no obvious activity loss was observed in the 100 h stability test. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：1332 / 1337

页数：6

共 33 条

[1] Steam activation of Mg-Al hydrotalcite.: Influence on the properties of the derived mixed oxides [J].