Co基催化剂上甲苯催化燃烧的研究

Study on Catalytic Combustion of Toluene on Co-Based Catalysts

采用浸渍法制备了Co/CeO2和Co/TiO2催化剂,考察了Co/CeO2和Co/TiO2催化剂催化燃烧甲苯的催化行为。研究表明:Co/CeO2催化剂活性高于Co/TiO2催化剂活性。Co/CeO2催化剂具有较低的起燃温度(T50 = 210℃),同时其在225℃下甲苯的转化效率可稳定在80%。Co/CeO2具有更大的比表面积,可增加反应物与催化剂的接触面积,提高催化剂活性。Co/CeO2和Co/TiO2催化剂中活性组分主要为Co3O4。Co/CeO2催化剂表面含有较高含量的Osurf和Co3O4可能是Co/CeO2催化剂具有更高活性的原因。

Co/CeO2 and Co/TiO2 catalysts were prepared by impregnation method.The catalytic behavior of Co/CeO2 and Co/TiO2 catalysts for catalytic combustion of toluene was investigated.It shows that the activity of Co/CeO2 catalyst is higher than that of Co/TiO2 catalyst.Co/CeO2 catalyst has a lower light-off temperature(T50=210?C),while the conversion of toluene can be stabilized at 80%at 225?C on Co/CeO2.Co/CeO2 has a larger specific surface area,which increases the contact area of the reactants with the catalyst,resulting in the higher activity of the catalyst.The active component in the Co/CeO2 and Co/TiO2 catalysts is Co3O4.The higher content of Osurf and Co3O4 on the surface of Co/CeO2 catalyst may be the main reason for the higher activity of Co/CeO2 catalyst.