本文采用差热分析、X射线衍射、透射电镜和选区电子衍射对催化剂的物种情况及形貌加以研究 ,结合催化剂焙烧过程的相变情况 ,从而获得催化剂焙烧过程的化学反应情况。发现稀土助剂的加入使载体的晶体结构发生变化 ,从而使载体表面改性 ,抑制了 Ni Al2 O4的生成 ,提高了 Ni O的分散度。而且发现有 L a2 O2 CO3晶体存在于载体表面 ,L a2 O3以高度分散的状态存在 In this paper, differential thermal analysis, X-ray diffraction, transmission electron microscopy and selected area electron diffraction of the species and morphology of the catalyst to be studied, combined with the phase transition during the catalyst roasting process, and thus obtain the chemical reaction of the catalyst roasting process. It is found that the addition of rare earth aids causes the crystal structure of the carrier to change, thereby modifying the surface of the carrier, inhibiting the formation of NiAl2O4 and improving the dispersion of NiO. Moreover, it was found that L a2 O 2 CO 3 crystals exist on the surface of the carrier, and L a 2 O 3 exists in a highly dispersed state