NiO/SiO_2气凝胶催化剂性能研究 Ⅰ.镍含量的影响

A STUDY ON THE PROPERTY OF NiO/SiO_2 AEROGEL CATALYSTS Ⅰ. EFFECT OF NICKEL CONTENT AND CALCINATION TEMPERATURE

以硝酸镍和正硅酸乙酯为原料采用溶胶凝胶超临界流体干燥法制备了不同镍含量的气凝胶催化剂。XRD ,TPR ,TEM ,IR等物理技术表征和顺酐液相催化加氢活性评价结果表明 :NiO/SiO2 气凝胶催化剂中NiO与SiO2有较强的相互作用 ,镍含量对活性组分与载体之间相互作用的影响导致催化剂具有不同的丁二酸酐和γ 丁内酯的选择性。在镍含量为 30w % ,经 6 73K焙烧的催化剂上γ

Using Ni(NO 3) 2 and tetraethyl orthosilicate (TEOS) as starting materials, aerogel catalysts were prepared by the Sol Gel SCFD method The analysis results of XRD, TPR, TEM, IR etc and the active evaluation of liquid phase catalysis hydrogenation show a strong interaction between NiO and SiO 2, The effect of nickel's content on the interaction between active components and supports result in the catalyst having different selectivity to succinic anhydride(SA) and γbutyrolacone( BL) The catalyst with 30% nickel and calcinated at 673?K has the best selectivity for γ BL