为提升V₂O₅-MoO₃/TiO₂催化剂的脱硝性能，扩展催化剂活性温度窗口，对催化剂进行Y改性处理。采用XRD、N₂-吸附脱附、H₂-TPR、拉曼光谱、NH₃-TPD、XPS等手段对催化剂进行表征。结果表明，添加0.3%的Y可以增加催化剂上聚合钒物种，提高催化剂V⁴⁺/V⁵⁺、（V⁴⁺+V³⁺）/V⁵⁺的摩尔比率，同时，还能增加催化剂上化学吸附氧（O_α）的含量。然而，过量的（0.6%、0.9%） Y会导致催化剂还原性能和酸性性能的显著降低，对催化剂的脱硝性能有负面影响。4种催化剂中，VMoY （0.3）/Ti催化剂的脱硝活性最佳。

Yttrium is selected as a promoter for V₂O₅-MoO₃/TiO₂ catalyst to enhance its catalytic activity and broaden its active temperature window.XRD,N₂-adsorption/desorption,H₂-TPR,Raman spectra,NH₃-TPD and XPS are utilized to characterize the catalyst.It is found that moderate addition of yttrium (0.3%) into V₂O₅-MoO₃/TiO₂ catalyst not only can increase the species of polymeric vanadate on the catalyst,but also increase the ratios of V⁴⁺/V⁵⁺,(V⁴⁺+V³⁺)/V⁵⁺,and O_α/(O_α+O_β) ratios of the catalyst.However,if the content of yttrium is excessive (0.6% or 0.9%),the reducibility and the acid sites of the catalyst both decrease evidently,which has negative impact on the catalytic activity of the catalyst.Among the catalysts investigated,VMoY(0.3%)/Ti catalyst exhibits the best catalytic performance in denitrification.

黄力(1986-),男,硕士,高级工程师,研究方向为SCR脱硝催化剂,huangl@dteg.com.cn