【摘要】 使用浸渍法结合不同预处理方法制备了一系列的Ru/SBA-15催化剂,并将其应用于丙三醇氢解反应中.使用N₂吸附-脱附、X射线衍射、CO化学吸附以及透射电子显微镜等方法对所制备Ru/SBA-15进行了表征.结果表明,催化剂前驱体经过空气焙烧后再经H₂还原的Ru/SBA-15催化剂上Ru的分散度较低,而直接使用H₂处理较高.同时,随着H₂还原温度提高,Ru分散度逐渐降低.保持反应活性接近时,随着Ru分散度的降低,TOF增加.表明Ru/SBA-15催化剂上丙三醇氢解是结构敏感反应.更多还原

【Abstract】 Ru/SBA-15 catalysts were prepared by impregnation and were pretreated under different conditions,and were characterized by N₂ adsorption-desorption,X-ray diffraction,CO chemisorption,transmission electron microscopy,and the reaction of glycerol hydrogenolysis.The catalyst calcined in air had larger Ru particles,while the direct reduction of the catalysts with H₂ without air pre-calcination made the Ru particles dispersed well.As the H₂ reduction temperature increased,the Ru dispersion decreased.The turnover frequency（TOF） of the catalysts increased as the Ru dispersion decreased,indicating that Ru/SBA-15 catalyzed glycerol hydrogenolysis is a structure sensitive reaction.更多还原