【摘要】 使用浸渍法制备独居石负载钼氧化物的催化剂，并对其进行表征和NH₃-SCR脱硝性能测试。结果表明，当脱硝反应温度为400℃时，Mo/Ce物质的量之比为0.3的复合催化剂的NO转化率达到75%。独居石增大了催化剂的比表面积；负载金属氧化物均匀分散在独居石表面，形成了Ce³⁺/Ce⁴⁺、Mo⁵⁺/Mo⁶⁺共存的状态，能促进电子转移，生成氧空位和不饱和化学键，有利于独居石表面活性位点的增多。相对于纯独居石，复合催化剂的氧化还原能力和NH₃的脱附活化能力均有所提升，但主要集中在高温范围内，低温段脱硝效率提升相对较小。更多还原

【Abstract】 The catalyst of molybdenum oxide-loaded monazite was prepared by impregnation method, and tests for its characterization and NH₃-SCR denitration performance were carried out.The results show that the NO conversion rate of the composite catalyst with Mo/Ce molar ratio of 0.3 reaches 75% at the denitration reaction temperature of 400 ℃.Monazite increases the specific surface area of the catalyst.The loaded metal oxides are uniformly dispersed on the monazite surface, resulting in the coexistence of Ce³⁺/Ce⁴⁺ and Mo⁵⁺/Mo⁶⁺ and promoting electron transfer to generate oxygen vacancy and unsaturated chemical bonds, which is in favor of the increase of the active site on the monazite surface.Compared with pure monazite, the redox property and the adsorption and activation capacity of NH₃ of the composite catalyst have been improved mainly in the high temperature range, with a relatively small improvement in the denitration efficiency in the low temperature section.更多还原