中文摘要：

采用自蔓延高温合成法（SHS）以堇青石蜂窝陶瓷（CH）为基体制备了一系列Ti1-yMnyOx/CH整体式催化剂,应用于柴油车尾气氮氧化物净化.考察了制备参数（钛锰比、涂覆次数、点燃温度）和工况条件（空速,水蒸气）对催化剂低温SCR（选择性催化还原）脱硝活性的影响,采用X射线荧光光谱仪（XRF）、场发射扫描电镜（FE-SEM）、X射线衍射（XRD）、X射线光电子能谱（XPS）、比表面积（BET）等表征手段对催化剂的结构和形貌进行表征.结果表明,在Ti∶Mn=1∶6（物质的量之比）,一次涂覆,点燃温度为350℃条件下所制备的催化剂具有最佳的NH3-SCR脱硝活性,Ti（0.14）Mn（0.86）Ox/CH催化剂在空速为30000 h^-1,氧气含量为3 vol%反应温度为150—250℃时反应条件为最优,催化剂在150℃以上具有良好的耐水性.Ti元素的添加提高了催化剂表面Mn^4＋/Mn^3＋比例,并使MnOx呈无定形态均匀分散在Ti（0.14）Mn（0.86）Ox/CH催化剂表面,提高催化剂的低温SCR活性.

英文摘要：

Cordierite honeycomb ceramics（ CH） as catalysts＇ carrier were prepared by selfpropagating high-temperature syntheses method（ SHS） to obtain a series of Ti1-yMnyOx/ CH catalysts for diesel exhaust purification. The effects of the preparation parameters（ Ti / Mn ratio in the combustion solution, times of coating, ignition temperature） and operation conditions（ space velocity and H2O） on performance of the monolith catalysts for the NH3-SCR were also investigated.The catalysts were characterized by BET,XRF,XRD,FESEM and XPS. It was observed that the catalysts ignited at 350 ℃ once with Ti / Mn = 1 ∶ 6 in the combustion solution showed the optimal NH3-SCR activity when tested at 150—250 ℃ with NH3/ NO ratio at 1,gaseous hourly space velocity（ GHSV） = 30000 h^-1and 3vol% O2. The catalyst showed excellent H2O tolerance when temperature was above 150 ℃. Addlition of Ti in the combustion solution increased Mn^4＋/ Mn^3＋ratio and improved uniform distribution of amorphous Mn Oxon the surface of the catalysts,which arebenefit for the NH3-SCR activity of the catalysts.