渣油加氢脱残炭的动力学模型研究

STUDY ON KINETIC MODELS FOR HYDRODE-CCR OF RESIDUE

以渣油为原料在200mL反应装置上进行加氢脱残炭试验,同时依据渣油残炭的结构组成以及加氢脱残炭的反应历程,对试验结果进行了分析,在此基础上提出渣油加氢脱残炭的三集总反应动力学模型,并与一集总和二集总加氢脱残炭反应动力学模型进行比较。结果表明,一集总动力学模型不能用来描述渣油加氢脱残炭过程,从二、三集总动力学模型的预测数据与试验值误差来分析,将沥青质与胶质做为一个集总或渣油原料的沥青质含量较少时所建立的动力学模型,两者误差精度相当。用三集总的一级反应动力学模型预测渣油加氢脱残炭过程时,与试验值相比,加氢脱残炭转化率的平均绝对误差为0 0056,加氢渣油残炭值的平均相对误差为1 01%。

The Conradson Carbon Residue(CCR) reaction was carried on the 200?mL Xytel pilot plant by hydrotreatment. According to the experimental results, a kinetic model of first-order and three-lump for the removal of CCR has been proposed based on the structural composition of carbon residue and the mechanism of the removal of CCR. Three-lump reaction kinetic model was compared with one-lump and two-lump models. The result shows that the one-lump reaction kinetic model can't describe the reaction satisfactorily. The predicted error of the two-lump and three-lump reaction kinetic models shows that there is no difference between them when we use the resins and asphaltenes as one lump. When the content of asphaltenes in the residue is low, there is no difference between the results of the two-lump and three-lump models. As we use the three-lump model for the removal of CCR to predict the result, the mean absolute error of the removal of CCR is 0.0056 and the average relative error of the CCR in the product is 1.01%. The three-lump reaction kinetic model can give better precision than the one-lump and the two-lump reaction kinetic models.