整体式Mn基复合金属氧化物催化燃烧VOCs性能研究

Catalytic combustion of VOCs by integral Mn-based mixed metal oxide

以堇青石为载体,采用浸渍法制备Mn-M/Cordierite(cord)(M=Co、Ce、La、Cu、Ni)复合金属氧化物催化剂,考察其催化燃烧甲苯的性能,并通过SEM、XRD和H_2-TPR对催化剂进行表征,结果表明,MnO_x和CoO_x之间具有相互作用,MnCo催化剂具有最高的甲苯催化活性,T_(50)和T_(90)分别为243℃和259℃.改变Mn和Co的比例,发现当Mn∶Co=2∶3时,Mn_2Co_3催化剂具有最高的甲苯和乙酸乙酯的催化性能,T_(90)分别为252℃和238℃.

Mn-M/Cord（ M = Co、Ce、La、Cu、Ni） mixed oxide catalysts were prepared by impregnation method with cordierite as a carrier,to investigate the performance of the catalytic combustion of toluene. The catalyst were characterized by scanning electron microscopy（ SEM）,X-ray diffraction（ XRD）,and hydrogen temperature programmed reduction（ H_2-TPR）. The results showed that interaction existed between MnO_x and CoO_x,and MnCo catalyst had the best catalytic activity for toluene oxidation. T_（50） and T_（90） were 243 ℃ and 259 ℃,respectively. When the Mn ∶ Co =2∶3 riatio was varied,it was found that Mn_2Co_3 catalyst had the highest catalytic activity for toluene and ethyl acetate,and T_（90） was 252 ℃ and 238 ℃,respectively.