在不同模板剂条件下，采用水热法和共沉淀法制备了纤维状、片状、棉花状和页岩状CeO₂/Cu_0.2Co_0.8O_δ催化剂，并对催化剂的结构和活性评价数据进行表征与分析。结果表明，共沉淀法制备的页岩状CeO₂/Cu_0.2Co_0.8O_δ催化剂催化CO的氧化性能最好，CO转化率达到100%时的温度最低（75℃）。在常温、3 MPa条件下可将液相丙烯中CO体积分数脱除至2×10^-8。页岩状CeO₂/Cu_0.2Co_0.8O_δ催化剂催化活性好的主要原因是其低温还原性能好、催化剂上CeO₂高度分散、CeO₂与载体之间有较强的相互作用。

Fiber-like,flake-like,cotton-like and shale-like CeO₂/Cu_0.2Co_0.8O_δ catalysts are prepared via hydrothermal and co-precipitation methods under different templating conditions.It is verified that shale-like CeO₂/Cu_0.2Co_0.8O_δ prepared by co-precipitation method has the best catalytic performance for CO oxidation,over which the temperature required to achieve 100% CO conversion is 75℃,being the lowest among the four kinds of catalysts.Over such shale-like catalyst,the volume fraction of CO in liquid propylene can be removed to 2×10^-8 at room temperature and 3 MPa.Based on the characterization results and activity data,it is concluded that the main reasons for the best catalytic activity of shale-like CeO₂/Cu_0.2Co_0.8O_δ are contributed to its best low-temperature reducibility,highly dispersed CeO₂ nanoparticles,and the strong interaction between CeO₂ nanoparticles and the support.

李磊(1982-),男,博士,高级工程师,研究方向为高分子材料研究,15054269@chnenergy.com.cn