以氧化镁、活性氧化铝和硝酸镧为原料，通过喷雾干燥法制备催化裂化金属捕集助催化剂CatClean，以提升催化裂化催化剂的抗铁污染性能，制备的金属捕集助催化剂CatClean主要由质量分数为60%的MgO与质量分数为30%的La₂O₃组成，磨损指数为1.3%/h。采用浸渍法进行铁污染，在催化裂化催化剂中添加或未添加CatClean的情况下，通过XRD、XPS、NH₃-TPD、H₂-TPR、EDX-Mapping等方法研究抗铁组分对催化剂反应性能的影响。结果表明：铁污染导致催化裂化催化剂的比表面积显著降低；在高温水热条件下，CatClean中的La₂O₃与铁反应生成稳定的LaFeO₃相，可有效抑制铁对催化剂的负面影响，未观察到MgFe₂O₄相的生成。EDX-Mapping结果进一步表明，铁元素可在催化剂与CatClean颗粒间迁移并被有效捕集。反应性能评价结果表明，当铁污染量为1.0%（质量分数）时，在反应转化率基本相当的条件下，焦炭产率降低0.78%~0.98%、干气产率降低0.30%~0.33%、总液收增加0.91%~0.95%，显著降低催化剂的副产物选择性，提高催化剂的抗铁污染性能。

To enhance the resistance of catalytic cracking catalysts to iron contamination，a metal⁃trapping additive named CatClean was developed using magnesium oxide（MgO），activated alumina（Al₂O₃），and lanthanum nitrate［La（NO₃）₃］ as raw materials via a spray drying method.The resulting CatClean was primarily consist of 60% MgO and 30% La₂O₃，with a wear index of 1.3%/h.Iron contamination was introduced through an impregnation method，and the effects of CatClean on catalyst performance were systematically investigated using XRD，XPS，NH₃-TPD，H₂-TPR，and EDX-Mapping techniques.The results indicated that iron contamination significantly reduced the surface area of the catalytic cracking catalyst.Under high⁃temperature hydrothermal conditions，La₂O₃ in CatClean reacted with iron to form a stable LaFeO₃ phase，effectively mitigating the adverse effects of iron：No formation of MgFe₂O₄ was detected.EDX-Mapping further revealed that iron species could migrate between catalyst and CatClean particles and be effectively captured.Performance evaluations demonstrated that at an iron contamination level of 1.0%，the addition of CatClean reduced the coke yield by 0.78%~0.98%，the dry gas yield by 0.30%~0.33%，and increased the total liquid yield by 0.91%~0.95%，without significantly affecting conversion.These findings confirmed that CatClean significantly reduced the selectivity toward undesired by⁃products and enhanced the catalyst′s resistance to iron contamination.