作　　者： ; ; ; ;

机构地区： 华南理工大学化学与化工学院传热强化与过程节能教育部重点实验室

出　　处： 《化工学报》 2006年第4期815-820,共6页

摘　　要： CuO/CeO2/γ-Al2O3 catalysts were prepared by both an ultrasound-assisted impregnation method and by a conventional impregnation method. The catalytic combustion of two volatile organic compounds （VOCs）, toluene and benzene, was carried out by using these CuO/CeO2/γ-Al2O3 catalysts. The surface properties of these catalysts were characterized with X-ray diffraction （XRD） and X-ray photoelectron spectroscopy （XPS）. The experimental results showed that the ignition temperature and total conversion temperature of the VOCs on the CuO/CeO2/γ-Al2O3 catalysts prepared by ultrasound-assisted impregnation were much lower than those on the CuO/CeO2/γ-Al2O3 catalysts prepared by conventional impregnation, and the activity of the CuO/CeO2/γ-Al2O3 catalysts prepared by ultrasound-assisted impregnation was much higher than that of the CuO/CeO2/γ-Al2O3 catalysts prepared by conventional impregnation. XRD results showed that the use of ultrasound improved the dispersion of Cu ions on the surface of the CuO/CeO2/γ-Al2O3 catalysts.XPS results indicated that the use of ultrasound promoted the distribution of active components on the surface of the CuO/CeO2/γ-Al2O3 catalysts and increased the Cu+ content on the surface of the catalysts so that the activity of the catalysts for VOCs combustion can be enhanced. CuO/CeO2/γ-Al2O3 catalysts were prepared by both an ultrasound-assisted impregnation method and by a conventional impregnation method. The catalytic combustion of two volatile organic compounds （VOCs）, toluene and benzene, was carried out by using these CuO/CeO2/γ-Al2O3 catalysts. The surface properties of these catalysts were characterized with X-ray diffraction （XRD） and X-ray photoelectron spectroscopy （XPS）. The experimental results showed that the ignition temperature and total conversion temperature of the VOCs on the CuO/CeO2/γ-Al2O3 catalysts prepared by ultrasound-assisted impregnation were much lower than those on the CuO/CeO2/γ-Al2O3 catalysts prepared by conventional impregnation, and the activity of the CuO/CeO2/γ-Al2O3 catalysts prepared by ultrasound-assisted impregnation was much higher than that of the CuO/CeO2/γ-Al2O3 catalysts prepared by conventional impregnation. XRD results showed that the use of ultrasound improved the dispersion of Cu ions on the surface of the CuO/CeO2/γ-Al2O3 catalysts. XPS results indicated that the use of ultrasound promoted the distribution of active components on the surface of the CuO/CeO2/γ-Al2O3 catalysts and increased the Cu^＋ content on the surface of the catalysts so that the activity of the catalysts for VOCs combustion can be enhanced.

关 键 词： 超声 制备 催化剂 催化燃烧 挥发性有机化合物

领　　域： [化学工程]