【摘要】 以Cu-Mn负载量、n(Cu)∶n(Mn)、焙烧温度和焙烧时间为4因素3水平设计正交实验,对浸渍法制备Cu-Mn/Ti O2和Cu-Mn/γ-Al2O3催化剂的条件进行优化,并考察催化剂催化氧化甲醛的活性。采用XRD、N2等温吸附-脱附和SEM等方法对催化剂进行表征。实验结果表明,焙烧温度对催化剂的活性影响较大;与Cu-Mn/Ti O2催化剂相比,Cu-Mn/γ-Al2O3催化剂催化氧化甲醛的活性更高。Cu-Mn/γ-Al2O3催化剂的最佳制备条件为Cu-Mn负载量30%(w)、n(Cu)∶n(Mn)=1∶4、焙烧温度500℃、焙烧时间6 h,在此条件下制备的Cu-Mn/γ-Al2O3催化剂,Cu-Mn氧化物呈高分散状态,甲醛的去降除率可达98.14%。更多还原

【Abstract】 The Cu-Mn/Ti O2 and Cu-Mn/γ-Al2O3 catalysts were prepared through impregnation and characterized by means of XRD,N2 adsorption-desorption and SEM. The catalysts were used in the catalytic oxidation of formaldehyde. The effects of Cu-Mn loading,n(Cu)∶n(Mn),calcination temperature and calcination time on the catalyst activities were investigated by orthogonal experiments. It was found that the effect of the calcination temperature was the biggest and the activity of the Cu-Mn/γ-Al2O3 catalyst was higher than that of the Cu-Mn/Ti O2 catalyst. It was found that the Cu-Mn oxides were highly dispersed,and the removal rate of formaldehyde could reach 98.14% under the optimum conditions for the Cu-Mn/γ-Al2O3 catalyst preparation: Cu-Mn loading of 30%(w),n(Cu)∶n(Mn) 1∶4,calcining time 6 h and calcination temperature 500 ℃.更多还原