油浆抽提油在Ni-Mo／SiO2-Al2O3催化剂上加氢脱除PAHs动力学

摘要

采用高压釜反应器，在反应温度为260～320℃、氢分压为4～7 M Pa、反应时间为2～6 h及剂油质量比为0．2～0．5的条件下，考察了催化裂化油浆（FCCS）抽提油在Ni-Mo/SiO2-Al2 O3催化剂上选择性加氢脱除多环芳烃（PAHs）的反应规律，针对影响加氢脱除 PAHs 反应的几个最重要的因素，建立了油浆抽提油选择加氢脱PAHs的幂函数型动力学方程。以微分法和牛顿迭代法对动力学数据进行非线性参数估值，确定了加氢脱除PAHs的动力学模型参数。研究表明，油浆抽提油选择性加氢脱 PAHs反应的动力学反应级数为1．14，表观活化能为44.33 kJ/mol ，实验值与模型预测值平均相对偏差为1．41％。%Selective hydrogenation of PAHs in the extracted FCCS over Ni-Mo/SiO2-Al2 O3 catalyst was studied in a high pressure batch autoclave .Experiments were carried out under the conditions of reaction temperature 260~320 ℃ ,hydrogen pressure 4~7 MPa ,reaction time 2~6 h and the ratio of catalyst to oil 0 .2~0 .5 .According to the most important factors of selective hydrogenation of PAHs ,the power function kinetics equation was established .The Differential method and Newton iteration method were adopted to estimate the nonlinear parameters of the model .The results show that the calculated reaction order is 1 .14 and the activation energy is 44 .33 kJ/mol . The average relative deviation of experimental data and model prediction data is 1 .41% .