【摘要】 利用BET比表面积测定、XRD、TG DTA等对化学混合法制备的Ni/SiO2单元催化剂进行了表征.BET比表面表明,适宜的硅溶胶浓度可以使催化剂具有较大的比表面积,但制备方法对比表面积影响不大.XRD表明,催化剂的活性组分为负载在SiO2上的金属镍,金属镍分散越好,镍的晶粒越小,催化剂的活性也越高.TG＿DTA表明催化剂活性组分和载体间的结合较强.更多还原

【Abstract】 Characterization of Ni/SiO₂ catalysts prepared with the method of chemical mixing procedure was carried out by means of BET surface area measurement, XRD and TG_DTA etc. It was shown by BET surface area that the suitable concentration of silica sol could make the catalysts have bigger surface areas, but preparation method had little influence on surface area. XRD showed that Ni was the activity component of catalyst. And with the increase of dispersion of Ni and the decrease of Ni crystal’s size, the catalyst had higher activity. TG_DTA indicated that the active component of catalyst and the support had stronger interaction.更多还原