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用浸渍法制备了固体稀土型和碱土金属型催化裂化（ＦＣＣ）捕钒剂。在钒中毒量为６０００μｇ／ｇ时，加入９％的稀土型捕钒剂与不加捕钒剂相比，催化剂的微反活性由３０．９％提高到５５．２％，表明所制捕钒剂具有很好的捕钒效果。采用ＮＨ３－ＴＰＤ和ＸＲＤ法测定了钒中毒前后及加入捕钒剂前后催化剂的酸性和催化剂中分子筛的晶体结构，表明ＦＣＣ催化剂经钒中毒后，其原有的Ｙ型分子筛晶体结构被破坏，生成了一种新的矿物莫来石；同时，钒中毒还破坏了催化剂的部分酸性。加入捕钒剂后，捕钒剂中的活性组分Ｌａ２Ｏ３与Ｖ２Ｏ５在水蒸气下作用，生成了稳定的ＬａＶＯ４化合物，从而使部分分子筛的晶体结构和催化剂的酸性免遭破坏。
Solid-earth and alkaline earth metal-based catalysis (FCC) vanadium precipitators were prepared by impregnation method. When the amount of vanadium poisoned was 6000 μg / g, the micro-activity of the catalyst increased from 30.9% to 55.2% when 9% rare earth-type vanadium capturing agent was added, indicating that the vanadium Agent has good catching vanadium effect. The acidity of the catalyst before and after vanadium poisoning and the crystal structure of the zeolite before and after the vanadium poisoning were determined by NH3-TPD and XRD. The crystal structure of the original Y-type zeolite was destroyed after the vanadium poisoning of the FCC catalyst. A new mineral mullite; the same time, vanadium poisoning also undermined part of the acidity of the catalyst. After adding vanadium capture agent, the active components La2O3 and V2O5 in the vanadium capture agent act under water vapor to form stable LaVO4 compounds, so that the crystal structure of part of the molecular sieves and the acidity of the catalyst are not damaged.