纳米BaTiO3的制备及其负载Ni基催化剂的应用研究

采用溶胶-凝胶法制备了纳米BaTiO₃,用纳米BaTiO₃粉体作载体通过浸渍法制备出Ni/BaTiO₃催化剂,并将其用于CO₂重整CH₄制合成气反应,纳米BaTiO₃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/BaTiO₃催化剂可使重整反应的CH₄和CO₂转化率分别达到94.4％和93.3％。

Preparation of Nanometer BaTiO3 and Application of Nanometer BaTiO3-supported Ni Based Catalyst

Nanometer BaTiO₃ was prepared by a sol-gel method,Ni/BaTiO₃ catalyst 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/BaTiO₃ catalyst 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).