柴油加氢脱硫绝热反应动力学模型

研究了NiMo型催化剂在柴油加氢反应过程中的动力学规律，综合考虑硫化氢、氮化物和芳烃的抑制作用,建立了三集总加氢脱硫反应动力学模型。通过对反应过程中放热和温升的估算，建立了柴油绝热加氢脱硫反应动力学模型。根据模型计算了等温和绝热环境中物流性质沿反应器轴向的变化规律。结果显示，二者的变化规律存在明显差异，达到相同脱硫深度时，绝热条件中硫化物和氮化物前期脱除速率慢于等温条件。另外，通过模型详细描述了绝热条件各集总硫化物、氮化物和芳烃含量沿反应器轴向的变化规律，获得了各集总在反应器不同位置硫化物、氮化物和芳烃含量的定量数据，结果显示,硫化物、氮化物和芳烃含量各集总的变化趋势均不相同。

Kinetic Model for Adiabatic Reaction of DieselHydrodesulfurization

This paper studies the kinetic law of NiMo catalyst inthe process of diesel hydrodesufurization. A three-lumpkinetic model of hydrodesufurization was established by comprehensivelyconsidering the inhibiting effect of hydrogen sulfide, nitride and aromatics.Then the adiabatic reaction kinetic model for diesel hydrodesulfurization wasestablished based on the estimation of heat release and temperature rise in thereaction process. Later, the axial variation laws of feedstock properties alongthe reactor in isothermal and adiabatic atmospheres were calculated accordingto the model. The results show that there is significant difference in thevariation laws abovesaid. When at the same depth of desulfurization, the earlyrate of removing sulfides and nitrides under adiabatic conditions is slowerthan that under isothermal conditions. Moreover, the axial variation law of thetotal content of hydrogen sulfide, nitride and aromatics lumps along thereactor under adiabatic conditions was described in detail through the model,and the quantitative data of the content of hydrogen sulfide, nitride andaromatics lumps at different positions of the reactor were obtained. Theresults show that the variation trends of sulfide, nitride and aromatics lumps aredifferent.