摘要
以介孔分子筛SBA-15为载体,采用浸渍法制备了Ce/Cu0.5Mn0.5/SBA-15催化剂,用X-射线衍射(XRD)和程序升温还原(TPR)等现代分析测试手段对催化剂的结构进行了表征,在常压固定床反应器上评价了催化剂的甲苯催化燃烧性能.结果表明,所有催化剂仍然保持SBA-15的介孔结构特征,催化活性组分Cu和Mn分别以CuO和MnO2的物相形式存在,添加适量的催化助剂CeO2后活性组分Cu和Mn以高分散状态存在,从而提高催化活性.当Cu0.5Mn0.5的含量为12%、Ce的含量为3.5%时,催化剂具有最好的活性,甲苯在480℃可完全催化燃烧消除.甲苯浓度较高,空速较大,甲苯转化率下降.
The Ce/Cu0.5Mn0.5/SBA-15 catalysts supported by mesoporous molecular sieve SBA-15 were prepared by means of impregnation.The structure and the surface properties of catalysts were characterized by XRD and TPR methods.They were tested for catalytic properties of toluene＇s combustion in atmospheric fixed-bed reactor.It was found that they all maintain characteristic of mesoporous molecular sieve SBA-15.The active catalysis component Cu and Mn existed respectively as CuO and MnO2.When the Catalytic additive CeO2 was added in maintaining the active component Cu and Mn was highly dispersed and displayed higher catalytic properties.The best result of toluene＇s entire combustion at 480℃ could be attained with 12%Cu0.5Mn0.5 and 3.5% Ce.If toluene density is high and air speed is fast,the toluene conversion will become low.
出处
《宁夏师范学院学报》
2011年第3期43-46,55,共5页
Journal of Ningxia Normal University
基金
宁夏自然科学基金(NZ09207)
