通过MAT、TPR、XRD等实验方法和量化计算系统研究了某种无毒硅盐 (简称为SPN)对FCC沸石催化剂上沉积镍的钝化作用和机理。结果表明 ,由于氧化硅和氧化镍在FCC再生条件下反应生成Ni2 SiO4 ,增加了Ni2 + 的LUMO能量 ,使镍在FCC反应条件下更难被还原 ,因此 ,添加适量的SPN可以有效地抑制FCC沸石催化剂上镍的脱氢生焦活性 ,达到钝镍的目的。 The passivation and mechanism of some non-toxic silicon salts (abbreviated as SPN) on nickel deposition on FCC zeolite catalysts were investigated by MAT, TPR, XRD and other quantitative methods. The results show that as the reaction between silica and nickel oxide under FCC regeneration conditions produces Ni2SiO4 and increases the LUMO energy of Ni2 +, making it more difficult for nickel to be reduced under the FCC reaction conditions. Therefore, adding an appropriate amount of SPN can effectively suppress FCC Zeolite catalyst on the dehydrogenation of coke activity, to achieve the purpose of blunt nickel.