燃料化学学报2017，Vol.45Issue(6)：723-730,8.
Mg/Al物质的量比对Ce-La/MgAl2O4-x催化剂催化CO还原NO性能的影响
Effect of Mg/Al molar ratios on NO reduction activity of CO using Ce-La/MgAl2O4-x catalysts
郭丽丽 1刘璐 1祝晓琳 1张强 1李春义1
作者信息
- 1. 中国石油大学(华东) 重质油国家重点实验室, 山东 青岛 266580
- 折叠
摘要
Abstract
A series of Ce-La/MgAl2O4-x catalysts were prepared by the incipient wetness impregnation method and characterized by BET, XRD, H2-TPR, CO-TPR and in situ FT-IR.The results demonstrate that the catalyst with a Mg/Al molar ratio of 0.5 yields the most uniform dispersion of CeO2 and greatly enhances formation of Ce-O-La solid solution, resulting in the increase of oxygen vacancy and surface Ce3+ content.Thereby,the synergistic effect between surface Ce3+ and oxygen vacancy gives rise to the best catalytic performance of NO reduction.Moreover, introduction of Mg species suppresses tranformation of CeO2 to Ce(SO4)2/Ce2(SO4)3 and then improves the SO2 resistance performance of Ce-La/MgAl2O4-0.5.关键词
NO还原/Ce-La/MgAl2O4-x/Ce-O-La固溶体/抗硫中毒能力Key words
NO reduction/Ce-La/MgAl2O4-x catalysts/Ce-O-La solid solution/SO2 resistance分类
化学化工引用本文复制引用
郭丽丽,刘璐,祝晓琳,张强,李春义..Mg/Al物质的量比对Ce-La/MgAl2O4-x催化剂催化CO还原NO性能的影响[J].燃料化学学报,2017,45(6):723-730,8.
