每周分享:Manganese–niobium mixed oxide catalyst for the selective catalytic reduction of NOx with NH3 at low temperatures
今天给大家分享的是2014年8月份 《Chemical Engineering Journal》上发表的一篇名为:Manganese–niobium mixed oxide catalyst for the selective catalytic reduction of NOx with NH3 at low temperatures
文章摘要如下:
A series of manganese-niobium mixed oxide (Mn–Nb) catalysts were prepared by homogeneous precipitation method and tested for low temperature selective catalytic reduction of NOx with NH3 (NH3-SCR). These catalysts were characterized by N2 adsorption, X-ray diffraction, H2-TPR, X-ray photoelectron spectroscopy, NOx-TPD and NH3-TPD. Among the series of Mn–Nb catalysts, Mn2Nb1Ox calcined at 500 °C exhibited the best catalytic activity. MnOx had stronger redox capability than Mn2Nb1Ox, resulting in lower N2 selectivity due to the unselective oxidation of NH3 at relatively high temperatures. The addition of Nb to MnOx enhanced the acidity, especially the Br?nsted acidity, which is responsible for the low temperature SCR activity. The combination of MnOx with strong redox capability and NbOx with high acidity simultaneously led to high NOx conversion and N2 selectivity over the Mn2Nb1Ox catalyst.
该文章中材料表征采用的是美国麦克仪器AutoChem 2920
详情可参考下面链接:
http://www.sciencedirect.com/science/article/pii/S1385894714003544
更多
Micromeritics 加入马尔文帕纳科成为颗粒表征领域的全球领导者
厂商
2024.07.19
探索电池性能的微观世界:麦克仪器电池材料孔隙率表征新方案
厂商
2024.07.09
Micromeritics 麦克仪器硬碳/硅碳孔隙表征解决方案
厂商
2024.05.13
CIBF重庆,Micromeritics带来锂电新角度
厂商
2024.04.24