中文摘要：

本文通过浸渍法制备了V2O5／TiO2系列筛选催化剂及V2O5／WO3／TiO2负载型催化剂，并在模拟评价装置上考察了上述催化剂在SCR反应中的催化性能。结果表明，V2O5在涂层材料中应该低于3wt．％；钒系催化剂对NOx的净化效率随反应温度的升高，先增加而后减小，存在一个适宜反应温度窗口；随反应温度升高，NH3泄漏量逐渐降低，在温度达到350℃之后，NH3泄漏量不再随温度的升高而变化；SCR反应温度较低时HC和CO浓度基本不变，但从450℃开始，HC浓度逐渐降低，而CO浓度则急剧升高；随NOx／NH3比例增加，NOx转化效率逐渐降低.

英文摘要：

Titania-supported tungsten and vanadium oxides with different WO3 and V2O5 loadings have been prepared by the impregnation method. Their activity and performance in the selective catalytic reduction （SCR） in NOx with NH3 are also characterized by a simulated evaluating rig. The results show that the content of V2O5 should be less than 3 wt.% of the entire coating. The conversion efficiency of NOx in SCR reaction is increased with the temperature until the critical temperature is reached, and then decreased with temperature. Therefore, there is a best temperature-window for NH3-SCR reaction. As to NH3,with the temperature increasing, leaking of NH3 gradually reduced incipiently and then kept as a constant after the temperature reaches 350℃. The concentration of HC and CO at the lower reactive temperature are invariable, however, as the temperature reached 450℃, the concentration of HC reduced gently and that of CO increased sharply. In addition, reduction activity of NOx is gradually reduced as the proportion of NOx to NH3 is enhanced.