【摘要】 以喹啉为含氮模型化合物,在高压滴流床反应装置中考察了工业NiW/Al2O3催化剂RN-10上的加氢脱氮动力学规律,研究了反应温度330~420℃、氢分压1.2~5.2MPa、氢油比200~800(v/v)、重量空速(WHSV)20~70h?1等反应条件对喹啉的加氢脱氮反应结果的影响。结果表明,反应温度对喹啉的脱氮率影响较大,提高反应温度可有效提高喹啉的脱氮率;同时,氢分压也是喹啉加氢脱氮的一个重要的影响因素,但是,当氢分压和氢油比较大时,氢分压和氢油比的变化对喹啉的脱氮率基本无影响。采用修正的n(n<1)级反应动力学模型对实验数据进行拟合,求得了喹啉加氢脱氮反应的表观活化能为180.4kJ·mol-1。经检验,模型计算结果与实验结果能较好地吻合。更多还原

【Abstract】 Using the quinoline as the model compound for N-bearing organics, the kinetics of the hydrodenitrogenation (HDN) reaction was studied over the commercial NiW/Al2O3 catalyst RN-10 in a high-pressure trickle-bed reactor. The effect of reaction conditions on the catalytic behavior was studied at reaction temperatrue of 330 to 420℃, hydrogen pressure of 1.2~5.2 MPa, volume ratio of hydrogen/oil of 200~800, and weight hourly space velocity of 20~70h-1. The conversion and HDN rate of quinoline increase drastically with the increase of reaction temperature, and the hydrogen pressure also has a significant effect on HDN of quinoline. However, when the hydrogen pressure and volume ratio of hydrogen/oil are high enough, they exert little influence on the conversion of quinoline. Experimental data were fitted by an n-order (n<1) kinetic model at various reaction conditions, and kinetic parameters of the model were calculated. The apparent activation energy of 180.4 kJ·mol-1 and the reaction order of 0.83 were achieved for this reaction. The experimental data are in good agreement with the calculated results of the model.更多还原