基于汽油烯烃转化的催化裂化动力学模型

以催化裂化反应机理为基础，把FCC原料及产品按馏程和化学组成进行集总划分.考虑氢转移、芳构化等二次反应，通过对反应网络的合理简化，提出了一种分子水平的动力学模型.通过参数估计求取18个动力学速度常数，建立集总动力学模型以预测汽油的化学结构组成.研究结果表明：该模型能较好预测不同条件下的产率分布，而且可以预测汽油组成分布，有助于降低汽油烯烃含量的研究.

KINETIC MODEL OF CATALYTIC CRACKING BASED ON OLEFIN REACTION MECHANISM

A molecular kinetic model was derived on the basis of FCC reaction mechanism to represent the cracking reactions.Lumps were defined not only by their boiling range but also by their chemical compositions.A molecular lumped approach was then proposed for the FCC reaction in which H transfer,aromatization and yield of fuel gas were taken into account.In order to predict chemical composition of gasoline, eighteen kinetic parameters in the lumped reaction kinetic model were determined by the parameter estimation method.This work showed that the proposed model simulation results were coincident with the experiment data.The proposed model not only could predict successfully the yields,but also could provide more information of the chemical component of gasoline, which is useful in the study on how to reduce the olefins content of gasoline.