A four-lump computational fluid dynamic (CFD) model was proposed for the investigation of vacuum gas oil hydrocracking in a trickle-bed reactor. The experiment was conducted at 360–390 °C and 146 bar in the reactor at three different flow rates. It was found that the modeling predictions of vacuum gas oil cracking agreed well with the experimental measurements. Furthermore, the developed model analyzed the effects of the feed flow rate in the reactors on the concentration distribution and product yield. The maximum yields of the products including distillate (31%), naphtha (14%), and gas (3%) were obtained at the lowest feed flow rate. However, the feed flow rate enhancement from 0.1568 to 0.2059 kg·h^–1 led to the increasing feed concentration and reducing the product concentration at the outlet of the reactor. The latter phenomenon was happened due to the decreasing feed residence time with the increasing mass flow rate.

中文翻译：

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固定床反应器中减压瓦斯油加氢裂化的计算流体动力学建模和仿真。

为研究滴流床反应器中的减压瓦斯油加氢裂化，提出了一种四集计算流体动力学（CFD）模型。实验是在三种不同的流速下于360–390°C和146 bar的反应器中进行的。发现真空瓦斯油裂解的模型预测与实验结果吻合良好。此外，开发的模型分析了反应器中进料流速对浓度分布和产物收率的影响。以最低的进料流速获得了包括馏出物（31％），石脑油（14％）和气体（3％）在内的产品的最大产率。但是，进料流量从0.1568增至0.2059 kg·h ^–1导致进料浓度增加，反应器出口产物浓度降低。后一种现象是由于随着质量流量的增加而减少的进料停留时间而发生的。