纳米BaTiO_3的制备及其负载Ni基催化剂的应用研究

Preparation of Nanometer BaTiO_3 and Application of Nanometer BaTiO_3-supported Ni Based Catalyst

采用溶胶-凝胶法制备了纳米BaTiO_3,用纳米BaTiO_3粉体作载体通过浸渍法制备出Ni/BaTiO_3催化剂,并将其用于CO_2重整CH_4制合成气反应,纳米BaTiO_3粉体粒径为25～60nm,颗粒外貌近似球形,其最佳制备条件为:水解用水量10mL,混合溶液pH=4～5,凝胶化温度343K,973K下煅烧处理,在反应温度为1073K,空速12000mL/(h·g·cat)下,Ni/BaTiO_3催化剂可使重整反应的CH_4和CO_2转化率分别达到94.4％和93.3％。

Nanometer BaTiO3 was prepared by a sol-gel method,Ni/BaTiO3catalyst with nanometer BaTiO3 as support was prepared by an impregnation method, and it was applied to the reaction of CO2 reforming CH4 to syngas. Under optimum parameters for preparation such as water volume for hydrolysis of 10mL, pH=4-5, gel temperature 343K, calcination at 973K, BaTiO3 ultrafine powders with spherical particles of 25-60nm in diameter were prepared. The Ni/BaTiO3catalyst makes the conversion of CH4 and CO2 reach as high as 94.4% and 93.3% respectively under the reaction conditions:temperature,1073K; the GHSV, 12000mL/(h·g·cat).