减四线油加氢脱硫、脱氮动力学研究

在小型滴流床加氢装置上,采用工业NiMo/Al2O3加氢精制催化剂(FF-46),在压力6~15MPa、温度608.15~638.15K、体积空速0.75~2.00h-1、氢油体积比600的条件下,对中国石化茂名分公司的减四线油进行加氢脱硫、脱氮动力学研究,建立了减四线油加氢脱硫、脱氮反应的动力学模型。通过Levenberg-Marquardt法和通用全局优化法拟合出各动力学参数。结果表明,减四线油加氢脱硫和加氢脱氮的反应级数分别为1.4和1.7,表观活化能分别为74.60kJ/mol和72.90kJ/mol,所建立的模型能够很好地预测产品中的硫和氮含量。

KINETICS OF HYDRODESULFURIZATION AND HYDRODENITROGENATION OF THE 4TH SIDE VACUUM STREAM

The hydrodesulfurization and hydrodenitrogenation kinetics of the 4th side stream of vacuum tower of Maoming Co. Sinopec were studied in a trickle bed hydrogenation unit using FF-46，a NiMo/Al2O3 hydrofining catalyst, at conditions of total pressure of 6~15 MPa，temperature of 608.15~638.15 K，liquid hourly space velocity of 0.75~2.00 h-1 and gas to liquid volume ratio of 600. A hydrodesulfurization and hydrodenitrogenation kinetic model of the 4th side stream was established. The experimental data were fitted by the Levenberg-Marquardt and the general global optimization method, and then the model was verified by the real data. The results indicate that the reaction orders of HDS and HDN are 1.4 and 1.7, respectively, and the activation energies are 74.60 kJ/mol and 72.90 kJ/mol, respectively. The established model can well predict the sulfur and nitrogen content in the product.