柴油加氢脱硫三集总动力学  

Three-Lump Kinetics Model of Diesel Hydrodesulfurization

作　　者：孙国权[1] 姚春雷[1] 全辉[1] 

机构地区：[1]中国石化抚顺石油化工研究院,辽宁抚顺113001

出　　处：《石油学报（石油加工）》2018年第2期389-397,共9页Acta Petrolei Sinica(Petroleum Processing Section)

摘　　要：采用固定床反应器,对加氢精制催化剂上的深度加氢脱硫(HDS)动力学进行研究,考察了反应温度、氢分压和空速对柴油脱硫效果的影响。根据柴油中各种硫化物的脱除行为,按被脱除的难易程度将柴油中的硫化物分为3类,构成三集总HDS模型,获得不同温度下的表观活化能(E)、指前因子(A)和对氢分压的分级数值。假定3类硫化物的活化能不变,将其指前因子与柴油的密度和馏程相关联,建立3个指前因子与中平均沸点的关系曲线,结合按温度切割的柴油窄馏分个数,建立三集总一级反应动力学模型,对方程进行了相关系数(R2)和残差检验。结果表明,所得动力学模型与实验数据吻合良好,在实际应用中可为开发新型超深度HDS催化剂及工艺提供理论指导。The kinetics of ultra-deep hydrodesulfuration(HDS)was investigated in a fixed-bed reactor with hydrofining catalysts.The influences of reaction temperature,hydrogen partial pressure and liquid hourly space velocity on HDS were studied respectively.By analyzing the desulfurization performances of sulfides in diesel,sulfides were divided into three types,and a three-lump HDS models was established.Apparent activation energy E,pre-frequency factor Aand the grade value of hydrogen pressure at different temperatures were obtained.By assuming that apparent activation energies of three types of sulfides were constant,a three-lump kinetics model with first order was obtained by associating the pre-exponential factor of sulfides in diesel with density and boiling range.According to the numbers of distillates separated by boiling range,the relationship between pre-exponential factor and mean average boiling point was acquired.The results of the correlation coefficient(R2)and residual error of the equation indicate that the obtained kinetics model coincided well with the experiments,and the model is helpful for developing new ultra-deep hydrodesulfuration catalysts and processes.

关 键 词：柴油 加氢脱硫(HDS) 集总 动力学模型 

分 类 号：TE621[石油与天然气工程—油气加工工程]