复合氧化物催化剂催化氧化甲苯性能

以γ-Al2O3为催化剂载体,铜、锰为活性组分,稀土元素铈为助催化剂,采用浸渍法制备复合氧化物催化剂5%Cu/γ-Al2O3、5%Mn/γ-Al2O3、5%Cu-5%Mn/γ-Al2O3和5%Cu-5%Mn-1.6%Ce/γ-Al2O3,并考察其催化氧化甲苯性能。研究表明,复合氧化物催化剂催化氧化甲苯具有显著的效果,5%Cu-5%Mn/γ-Al2O3催化剂和5%Cu-5%Mn-1.6%Ce/γ-Al2O3催化剂表现出良好的低温活性和催化性能,对甲苯的完全燃烧温度分别为340℃和285℃。采用SEM和BET对催化剂进行表征,结果表明,催化剂的催化活性与活性组分在催化剂表面的分散度和催化剂的孔结构相关。

The properties of composite oxide catalysts for catalytic oxidation of toluene

Using γ-Al₂O₃ as catalyst carrier, copper and manganese as catalytic active component,and rare earth element cerium as co-catalyst,composite oxide catalysts 5%Cu/γ-Al₂O₃,5%Mn/γ-Al₂O₃ ,5%Cu-5%Mn/γ-Al₂O₃ and 5%Cu-5%Mn-1.6%Ce/γ-Al₂O₃ were prepared by the impregnation method.Their performance for catalytic oxidation of toluene was investigated.The results showed that the composite oxide catalysts possessed significant effects of catalytic oxidation of toluene.5%Cu-5%Mn/γ-Al₂O₃ and 5%Cu-5%Mn-1.6%Ce/γ-Al₂O₃ catalysts exhibited good activity at low-temperature and catalytic properties,and their toluene complete-combustion temperatures were 340 ℃ and 285 ℃,respectively.The catalysts were characterized by means of SEM and BET.The results showed that the catalytic activity of the catalysts related to the dispersion of the active components on the catalyst surface and pore structure of the catalysts.