CAJ | 학술논문

以 TiO2为载体,采用浸渍法制备 V-M/TiO2(M=Cu、Cr、Ce、Mn、Mo)双金属氧化物催化剂,考察其催化燃烧氯苯、二氯甲烷等含氯有机废气(CVOCs)的性能,并通过 XRD、BET、H2-TPR 和 NH3-TPD 对催化剂进行了表征.结果表明,V-Mo/TiO2催化剂比表面积最大,催化剂表面活性组分的高分散性和良好的酸性分布使得V-Mo/TiO2能够在260oC将氯苯完全转化为CO2和HCl.而V-Mn/TiO2则具有丰富的活性氧,可显著提高催化剂深度氧化二氯甲烷的能力,在380℃时二氯甲烷即可完全燃烧,并且反应对CO2有着很高的选择性.
이 TiO2위재체,채용침지법제비 V-M/TiO2(M=Cu、Cr、Ce、Mn、Mo)쌍금속양화물최화제,고찰기최화연소록분、이록갑완등함록유궤폐기(CVOCs)적성능,병통과 XRD、BET、H2-TPR 화 NH3-TPD 대최화제진행료표정.결과표명,V-Mo/TiO2최화제비표면적최대,최화제표면활성조분적고분산성화량호적산성분포사득V-Mo/TiO2능구재260oC장록분완전전화위CO2화HCl.이V-Mn/TiO2칙구유봉부적활성양,가현저제고최화제심도양화이록갑완적능력,재380℃시이록갑완즉가완전연소,병차반응대CO2유착흔고적선택성.
A series of V-M/TiO2 (M=Cu、Cr、Ce、Mn、Mo)catalysts were prepared by impregnation method. The catalytic activity of chlorinated volatile organic compounds(CVOCs), such as chlorobenzene(CB)、dichloromethane(DCM) over V-M/TiO2were investigated. The physical-chemical properties of the catalysts were also investigated by XRD、BET、H2-TPR and NH3-TPD. It was found that the V-Mo/TiO2 catalyst could completely combustion oxidation of chlorobenzene into CO2 and HCl at 260℃, which was related to the biggest BET surface and highly dispersed of surface acidity; Moreover, the V-Mn/TiO2 catalyst showed a high activity and good selectivity for catalytic combustion of dichloromethane (DCM), with a 100%conversion obtained at 380℃. This performance was attributed to a large amount of active surface oxygen, which could enhance the ability of deep oxidation of dichloromethane.