高等学校化学学报Issue(3)：574-581,8.DOI:10.7503/cjcu20140895
Pr掺杂对V2 O5-MoO3/TiO2催化剂NH3-SCR反应活性的影响
Promotional Effect of Pr-Doping on the NH3-SCR Activity over the V2 O5-MoO3/TiO2 Catalyst
摘要
Abstract
V2 O5-MoO3/Pr6 O11-TiO2 catalysts were prepared by means of an impregnation method and TiO2 supports doped with different amounts of Pr were synthesized via a sol-gel method. The evaluation of selective catalytic reduction( SCR) activity indicated the catalysts with high activity and N2 selectivity in a temperature range of 220—400 ℃. And the Pr-doped catalyst also exhibited good resistance to SO2 and H2 O. The cata-lysts were characterized by means of X-ray diffraction( XRD) , N2 adsorption-desorption( BET) , X-ray photo-electron spectrometer( XPS ) and in situ diffuse reflectance infrared Fourier transform spectroscopy ( in situ DRIFTS) . The results showed that the specific surface areas of Pr-doped V2 O5-MoO3/TiO2 catalysts were lar-ger than that of the V2 O5-MoO3/TiO2 catalyst. Furthermore, the addition of Pr on V2 O5-MoO3/TiO2 catalyst could give more NH3 adsorption species, chemisorbed oxygen species, bridged nitrate species and the numbers of Brönsted acid sites, resulting in an enhance in the catalytic activity for NH3-SCR of NOx .关键词
Pr掺杂/V2O5-MoO3/TiO2催化剂/选择性催化还原/氨气Key words
Pr-Doping/V2 O5-MoO3/TiO2 catalyst/Selective catalytic reduction( SCR)/NH3分类
化学化工引用本文复制引用
晁晶迪,何洪,宋丽云,房玉娇,梁全明,张桂臻,邱文革,张然..Pr掺杂对V2 O5-MoO3/TiO2催化剂NH3-SCR反应活性的影响[J].高等学校化学学报,2015,(3):574-581,8.基金项目
国家自然科学基金(批准号:21277009)和北京市教委项目(批准号:TJSHG201310005003)资助.Supported by the National Natural Science Foundation of China(No.21277009) and the Education Commission Project of Beijing Municipa-lity, China(No. TJSHG201310005003) （批准号:21277009）
