燃料化学学报2016，Vol.44Issue(12)：1494-1501,8.
N2O在Mg-Co和Mg-Mn-Co复合氧化物上的催化分解
Catalytic decomposition of N2 O over Mg-Co and Mg-Mn-Co composite oxides
摘要
Abstract
Mg-Co and Mg-Mn-Co composite oxides with different compositions were prepared by sol-gel method for N2 O catalytic decomposition in the presence of oxygen. Of Mg-Mn-Co catalysts, the one with higher activity was impregnated by K2 CO3 solution to make K-modified catalyst. These catalysts were characterized by X-ray diffraction ( XRD ) , nitrogen physisorption ( BET ) , scanning electron microscopy ( SEM ) , temperature-programmed reduction of hydrogen(H2-TPR), and temperature-programmed desorption of oxygen(O2-TPD). The effect of preparation parameters such as compositions and potassium loadings on their catalytic activity has been investigated. The results show that K-modified catalysts exhibit better activity and higher resistance towards water in contrast to un-modified catalyst due to the weakness of surface metal-oxygen bonds. Among these catalysts, 0. 02K/MgMn0. 2 Co1. 8 O4 is the most active, over which 97% and 60% conversions of N2 O can be reached at 400 ℃ after continuous running for 50 h under the atmosphere of oxygen-alone and oxygen-steam together, respectively. When the steam is switched off, the catalytic activity of 0. 02K/MgMn0. 2 Co1. 8 O4 can be restored to large extent, indicating the good water-resistance of K-modified catalyst.关键词
N2O催化分解/Mg-Co复合氧化物/Mg-Mn-Co复合氧化物/K改性催化剂/催化性能Key words
catalytic decomposition of N2 O/Mg-Co composite oxides/Mg-Mn-Co composite oxides/K-modified catalysts/catalytic performance分类
化学化工引用本文复制引用
郑丽,吴藏藏,徐秀峰..N2O在Mg-Co和Mg-Mn-Co复合氧化物上的催化分解[J].燃料化学学报,2016,44(12):1494-1501,8.基金项目
The project was supported by the Department of Science and Technology of Shandong Province (2016GSF117003) and Graduate Innovation Foundation of Yantai University ( GIFYTU).山东省重点研发计划(2016GSF117003)和烟台大学研究生科技创新基金(GIFYTU)资助 （2016GSF117003）
