基于结构导向集总的柴油加氢精制分子水平反应动力学模型Ⅱ.反应规律分析与优化

Molecular level reaction kinetic model of diesel hydrofining constructed based on structure oriented lumping Ⅱ. Reaction law analysis and optimization

采用基于结构导向集总的柴油加氢精制分子水平反应动力学模型对中国石油某分公司柴油加氢精制装置的操作条件进行优化,所建模型可以预测不同反应条件下精制产物中典型分子的含量,并可在分子水平上描述柴油体系中的硫化物、氮化物、多环芳烃、正构烷烃等在加氢精制反应器中的转化规律,揭示反应温度、压力、液态空速等操作条件对加氢精制反应过程的影响规律,指导柴油加氢精制装置的操作优化。实验结果表明,精制柴油硫、氮含量小于10μg/g、精制柴油收率不低于设计指标89.5%时,模型预测优化的操作温度区间为314.5~320.3℃。

The molecular level reaction kinetic model of diesel hydrofining constructed based on structure-oriented lumping is used to optimize the operating conditions of a set of diesel hydrofining units of a branch of PetroChina,the model can predict the content of typical molecules in refined products under different reaction conditions,and describe the transformation laws of sulfide,nitride,polycyclic aromatic hydrocarbons and n-paraffins in the diesel system in the hydrofining reactor at the molecular level,reveal influences of operating conditions such as reaction temperature,pressure and LHSV on the hydrofining reaction process,and guides the operation optimization of the diesel hydrofining unit.When the sulfur and nitrogen content in refined diesel is less than 10μg/g and the refined diesel yield is not lower than 89.5%of the design index,the model predicted optimized operating temperature range is 314.5-320.3℃.