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Formation kinetics of hydrocarbon compounds in the vacuum gas oil oxycracking process
Reaction Kinetics, Mechanisms and Catalysis ( IF 1.7 ) Pub Date : 2020-08-10 , DOI: 10.1007/s11144-020-01831-7
E. A. Guseinova , K. Yu. Adzhamov , L. A. Mursalova , S. R. Safarova

The kinetics of the formation of oxygen-free hydrocarbon compounds obtained during the process of oxidation of vacuum gas oil at 450–550 °C for 2700 s of conducting of the process was studied. It was established that the highest rate of hydrocarbon formation was noted for the C1–C4 fraction starting from the moment the process started and up to 900 s (1.76 × 10−8 – 4.58 × 10−8). For other fractions, reaction rate maximums were noted: for C5–C9—300 s from the start of the process; for C10–C12—in the interval between 300 and 900 s, i.e. at 600 s process duration; for the raw fractions C22–C30, C31–C35 and C36–C40, grew after 1800s. The data on the influence of the process temperature on the rate of hydrocarbon formation allowed us to establish that the oxycracking process is limited by the formation of C10–C16 hydrocarbon fractions. The increase in contact time to a greater extent affects the rate of formation of hydrocarbons C1–C4 and C17–C21. The features of the rate of hydrocarbon production as a function of the amount of oxygen were found out: the rate of formation of hydrocarbons C1–C4 and C17–C21 increases with increasing oxygen content (in the case of C17–C21 it passes through a minimum); C5–C9 and C13–C16—monotonously decreases; C10–C12 passes through a maximum at an oxidation state of 1%, which undoubtedly indicates the role of oxygen in the destructive processes of the formation of hydrocarbons that do not contain oxygen under oxycracking conditions.



中文翻译:

减压瓦斯油氧裂化过程中烃类化合物的形成动力学

研究了在真空瓦斯油在450–550°C的温度下进行2700 s的氧化过程中获得的无氧烃化合物形成的动力学。已经确定,从过程开始到900 s(1.76×10 -8 – 4.58×10 -8),C 1 –C 4馏分的烃形成速率最高。对于其他馏分,记录了最大反应速率:对于从过程开始的C 5 –C 9 -300 s;对于C 10 –C 12 —在300到900 s之间的间隔内,即600 s的过程持续时间;原始分数C 22 –C 30,C 31 –C 35和C 36 –C 40在1800s之后增长。有关工艺温度对烃形成速率影响的数据使我们能够确定,氧裂化工艺受C 10 -C 16烃馏分形成的限制。接触时间的增加在很大程度上影响了碳氢化合物C 1 -C 4和C 17 -C 21的形成速率。发现了碳氢化合物生成速率随氧气量变化的特征:碳氢化合物C 1 –C 4和C 17的生成速率– C 21随着氧含量的增加而增加(在C 17 –C 21的情况下,它通过的最小值);C 5 -C 9和C 13 -C 16-单调下降;C 10 –C 12在1%的氧化态下最大通过,这无疑表明氧在氧裂化条件下形成不含氧的碳氢化合物的破坏性过程中的作用。

更新日期:2020-08-11
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