催化重整集总反应动力学模型研究——(Ⅱ)七碳反应网络的动力学模型

STUDIES ON CATALYTIC REFORMING REACTION KINETIC MODELS (Ⅱ)The catalytic reforming reaction kinetics of C_7 Hydrocarbons

本文论证了七碳重整反应网络和动力学模型的建立。在压力为8×10^(■) 10×10^(■) 12×10^(■)Pa,温度 160°,180°,500°,氢,油摩尔比为10的实验条件下研究了七碳组分在 Pt-Sn/Al_2O_3催化剂上的本征反应动力学。用最佳步长策略法估计了各个反应的动力学参数。计算了各个反应的频率因子和活化能,检验了模型的拟合效果与预测能力。

A new reaction network for the catalytic reforming of C_7 hydrocarbons is proposed and an appropriate kinetic model was developed.The best step-size method was used in parameter estimation.A complex optimizaton method was also used for the determination of the initial values of kinetic constants. The experiments were conducted in a MR-80 microreactor with online GC analysis under the conditions of 460 480 500C and 8×10~5.10×10~5.12×10~5Pa hydrogen pressure.The catalyst used was Pt-Sn/Al_2O_3.All measurements were made at constant activity and selectivity.The results predicted by the model fit the experimental data fairly well.