Abstract The upgrading of heavy coker naphtha under conditions of the industrial fluid catalytic cracking (FCC) unit has been investigated, with the aim of obtaining light olefins and a gasoline fraction suitable to be used in the blending of motor fuels. The experiments have been conducted in a riser simulator reactor at: 500 and 550 °C; catalyst to oil mass ratio, 6 gcat goil−1; and, contact time, 3 to 12 s. Moreover, the effect of the properties of two commercial equilibrium catalysts on the products has been also assessed. Products have been grouped in: dry gas, liquefied petroleum gases, gasoline, light cycle oil and coke. The presence of strong acid sites in the catalyst favors the formation of light olefins, yielding a 5 and 3.3 wt% of propylene and butenes, respectively, at 550 °C and 6 s. A higher content of zeolite (with moderate acid strength sites) and a bigger size of the mesopores of the matrix promote the formation of a commercially interesting gasoline fraction with a yield of 90 wt% under the same conditions, with a concentration of aromatics, naphthenes, n-paraffins, olefins and iso-paraffins of 25, 10, 28, 21 and 15 wt%, respectively, and a RON of 84.

中文翻译：

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炼油FCC装置催化裂化重焦石脑油升级

摘要 研究了在工业流化催化裂化 (FCC) 装置条件下重焦石脑油的升级，目的是获得轻质烯烃和适合用于混合发动机燃料的汽油馏分。实验是在提升管模拟反应器中进行的：500 和 550 °C；催化剂与油的质量比，6 gcat goil−1；和，接触时间，3 到 12 秒。此外，还评估了两种商业平衡催化剂的性能对产品的影响。产品分为：干气、液化石油气、汽油、轻循环油和焦炭。催化剂中强酸位点的存在有利于轻烯烃的形成，在 550°C 和 6 秒时分别产生 5 和 3.3 重量％的丙烯和丁烯。