Preparation of novel Cu-Ce composited material and its performance of deNOx
XIE Peng， NIE Tianming， DENG Lidan， CHEN Rong
Key Laboratory for Green Chemical Process of Ministry of Education and School of Chemistry and Environmental Engineering， Wuhan Institute of Technology， Wuhan 430073
Abstract：CuO/CeO2 composited catalysts were successfully synthesized by impregnation and precipitate-hydrothermal method， respectively. The prepared samples were characterized by powder X-Ray diffraction (XRD)， scanning electron microscopy (SEM)， energy dispersive X-Ray spectroscopy (EDX) and N2 adsorption-desorption measurements. The CuO/CeO2 composites prepared by precipitate-hydrothermal method exhibited better crystallinity than that prepared by impregnation which mainly existed in amorphous state. Both types of CuO nanoparticles were well dispersed on the surface of CeO2 and the corresponding size obviously decreased. The CuO/CeO2 composite prepared by precipitate-hydrothermal method formed an even and compact mesoporous structure with interconnected pore channels， while the composited catalyst prepared by impregnation had a narrow pore size distribution. The deNOx activities of C3H6-SCR over different catalysts were tested under different temperatures. The results indicated that both the composited catalysts prepared by different methods showed higher catalytic activities than that of single component. Moreover， the composited material prepared by precipitate-hydrothermal method exhibited stronger synergistic effect with the maximum NO conversion rate of 74% at 350 ℃. It was probably due to the well dispersion of CuO species on CeO2 surface， promoting the formation of a special porous structure. It is beneficial for the heterogeneous catalytic reaction， amd thus enhancing the synergistic effect and catalytic activities.
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2017, Vol. 51 
