Abstract Additives to a zeolite-containing cracking catalyst were synthesized and studied in order to enhance the resistance to the poisoning effect of nitrogen compounds (in particular indole) upon cracking of n-undecane as the model FCC hydrocarbon. The additives were represented by acid-activated clays and mixed oxides. The activation of clays in the catalyst by 5% sulfuric acid solutions was shown to enhance the resistance to nitrogen. The introduction of Mg, Al – mixed oxides in the catalytic system in the amount of 10 wt% increased its activity and resistance to indole. The highest resistance was observed for the systems containing magnesium‑aluminum oxides with a Me2 + to Me3 + molar ratio equal to 0.5: 1. Cobalt modification of these mixed oxides enhanced the activity and nitrogen resistance of the cracking catalysts. Use of such nitrogen-resistant catalysts will allow cracking of heavy raw materials.

中文翻译：

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正十一烷-吲哚模型混合物在耐氮化合物裂化催化剂上的转化

摘要 合成并研究了含沸石裂化催化剂的添加剂，以提高对作为模型 FCC 烃的正十一烷裂化时的氮化合物（特别是吲哚）中毒效应的抵抗力。添加剂以酸活化粘土和混合氧化物为代表。5% 的硫酸溶液对催化剂中粘土的活化显示出提高了对氮的抵抗力。在催化体系中引入 10 wt% 的 Mg、Al 混合氧化物提高了其活性和对吲哚的抵抗力。对于含有 Me2+ 与 Me3+ 摩尔比等于 0.5:1 的镁-铝氧化物的体系，观察到最高的电阻。这些混合氧化物的钴改性增强了裂化催化剂的活性和抗氮性。