Synthesis, Characterization And Catalytic Performance Of Mesoporous Cu-Ce-O Catalyst

CuO-CeO₂ samples were synthesized by co-precipitation, hard template and hydrothermal methods. The as-prepared CuO-CeO₂ samples were characterized by XRD, BET and TPR and were test for water gas shift （WGS） reaction in a fixed-bed micro reactor. It is proved that texture and performance of catalysts were depended on the preparation methods、Cu-Ce atomic ratio and calcinations temperature.The 30%CuO-CeO₂ samples by co-precipitation was meso-porous structure. The surface area of precursor was 274. 59 m²/g and turned to 20.52 m²/g （calcined at 650℃） and 194.44m²/g （calcined at 350℃）. The CO conversion decrease with the increasing of calcination temperature and the activity of sample calcined at 550℃is only 12%.Compared to co-precipitation, the 30%CuO-CeO₂ sample synthesized by hard template present the uniform porous structure and narrow porous size distribution of averge 3.8nm.When the calcined temperature increases from 350℃to 650℃the specific surface area decreases from 242.08m²/g to 133m²/g. The CO conversion of sample calcined at 550℃is only 23%.Cu were higher dispersed on the surface of CeO₂ in spite of the lower specific surface area of 30%CuO-CeO₂ sample synthesized by hydrothermal method. The Copper content （10-30% atom） of the CuO-CeO₂ sample synthesized by hydrothermal method has significant effect on the activity for the WGS reaction. The activity of WGS reaction increases with the copper content and the activity of 30%CuO-CeO₂ sample raised to 51%.