为提高传统选择性催化还原(SCR)催化剂低温窗口的NO去除效率,运用自蔓延高温合成法(Self-Propagating High-temperature Synthesis)制备了一系列低温锰铁系催化剂.对其在SCR法去除NO中的反应性能进行评价,分析了活性组分和液相点燃温度的影响；利用X射线衍射仪(XRD)对催化剂晶型进行表征,并使用原位漫反射傅里叶变换技术(in situ DRIFTS)进行反应机理研究.实验结果表明:MnOx有良好的低温活性,Fe的引入能在改善其N2选择性的同时保持优秀的低温活性;SHS方法制备的该类催化剂的性能随着点燃温度升高而下降；原位分析表明BrΦnsted酸和Lewis酸都参与了Ti0.9Mn0.05Fe0.05O2-(δ)的SCR反应,其中前者具有更高的活性；单齿硝酸盐为关键的活性硝酸盐物种.%To improve NO removal efficiency of low temperature SCR catalyst, a series of ferromanganese catalysts were prepared with the method of self-propagating high-temperature synthesis (SHS). The performance of catalyst in DeNO reaction was evaluated and the influences of active components and liquid ignition temperature were analyzed. The crystal form of catalyst was characterized by X-ray diffraction device and the mechanism of reaction was researched with in situ DRIFTS technology. The experimental results show that MnQ, has a high activity at low temperature. The introduced Fe improves the N2 selectivity and keeps the activity at low temperature. The performance of SHS-prepared catalyst decreases with the increase of ignition temperature. The in-situ analysis indicates that both BrOnsted acid and Lewis acid participate in the SCR reaction of Ti0.9 Mn0.05 Fe0,05O2-8 and that the former has a higher activity. In addition, the monodentate nitrate is the key active nitrate species.
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