【摘要】 在室温条件下,通过溶胶-凝胶法制备了新的纳米氧化铁载体.X射线衍射、差热-热重分析、扫描电子显微镜和N2物理吸附等测试结果表明,制得的Fe2O3粉体具有典型的介孔结构,孔径范围18.8~25.0nm,晶相组分由原料配比和制备条件决定.进一步通过浸渍法制备了高活性的Ru-K/Fe2O3氨合成催化剂.在475℃,10MPa,10000h-1和V(H2)/V(N2)=3的条件下,考察了负载型Ru-K/Fe2O3催化剂的活性.结果表明,载体中γ-Fe2O3的含量越高,其氨合成活性越好.更多还原

【Abstract】 A novel nanometer iron oxide support was successfully synthesized by the sol-gel method. The results of X-ray diffraction, differential thermal analysis, thermogravimetric analysis, scanning electron microscopy, and N₂ physical adsorption show that the prepared Fe₂O₃ particles have a typical mesoporous structure with pore diameters of 18.8-25.0 nm. The effect of the crystal phase composition of Fe₂O₃ on catalytic activity of the Ru-K/γ-Fe₂O₃ catalyst was further investigated under the conditions of 475 ℃, 10 MPa, 10?000 h -1 , and V（H₂） / V（N₂） =3. The higher the content of γ-Fe₂O₃ in the support, the better the catalytic activity of the catalyst.更多还原