CAJ | 학술논문

采用不同的浸渍法制备了负载型催化剂Cu-Mn-O/Ce/γ-Al_2O_3-TiO_2,应用X射线粉末衍射(XRD)、低温液氮吸附(BET)、H_2程序升温还原(H_2-TPR)和X射线光电子能谱(XPS)等测试技术对催化剂进行了表征.在200～500 ℃考察了催化剂催化燃烧较高浓度的苯(体积分数为3.6%)反应中的催化性能.结果表明, 15%CuMn_2O_x/Al_2O_3-TiO_2催化剂(CuMn_2O_x质量分数为15%)在300 ℃苯的转化率达到79%,其低温催化活性明显高于单独负载氧化铜或氧化锰的催化剂.而采用共浸渍法制备的催化剂15%CuMn_2O_x-15%CeO_2/Al_2O_3-TiO_2在300 ℃苯的转化率达81%,其催化活性明显高于分步浸渍法制备的催化剂.CeO_2的添加更利于提高共浸渍法制备的催化剂中各活性组分的分散度和相互作用.
채용불동적침지법제비료부재형최화제Cu-Mn-O/Ce/γ-Al_2O_3-TiO_2,응용X사선분말연사(XRD)、저온액담흡부(BET)、H_2정서승온환원(H_2-TPR)화X사선광전자능보(XPS)등측시기술대최화제진행료표정.재200～500 ℃고찰료최화제최화연소교고농도적분(체적분수위3.6%)반응중적최화성능.결과표명, 15%CuMn_2O_x/Al_2O_3-TiO_2최화제(CuMn_2O_x질량분수위15%)재300 ℃분적전화솔체도79%,기저온최화활성명현고우단독부재양화동혹양화맹적최화제.이채용공침지법제비적최화제15%CuMn_2O_x-15%CeO_2/Al_2O_3-TiO_2재300 ℃분적전화솔체81%,기최화활성명현고우분보침지법제비적최화제.CeO_2적첨가경리우제고공침지법제비적최화제중각활성조분적분산도화상호작용.
The catalytic combustion of (φ=3.6%) benzene during 200～500 ℃ was investigated on the supported Cu-Mn-O/Ce/Al_2O_3-TiO_2 catalysts prepared via different wet impregnation methods and characterized by X-ray diffraction(XRD), N2 adsorption at liquid-nitrogen temperature(BET), H_2 temperature programmed reduction(H_2-TPR) and X-ray photoelectron spectroscopy(XPS) techniques. The results show that the 15%CuMn_2O_x/Al_2O_3-TiO_2 catalyst(ω(CuMn_2O_x)=15%) achieving 79% conversion of benzene at 300 ℃ presented higher activity than Cu/Al_2O_3-TiO_2 and Mn/Al_2O_3-TiO_2 catalysts. While, the 15%CuMn_2O_x -15%CeO_2 /Al_2O_3-TiO_2 catalyst obtained by co-impregnation method attaining 81% conversion of benzene at 300 ℃ showed much higher catalytic activity than the catalyst prepared by two step impregnation. The addition of CeO_2 in co-impregnation method can enhance the dispersion and interaction of components.