Abstract:

An 8-lump kinetic model is proposed for Daqing naphtha pyrolysis based on the analysis of experimental data obtained in a self-designed cracking experiment device. A computational program was written by Marquardt⁺⁺ method and Matlab language and kinetic constants were calculated. The error analysis showed that most of the apparent activation energies are between 112 and 317 kJ•mol^-1,the raw material lump relative error is approximately about 10%, while the relative error for the main target products is basically within 7%, in which the average relative error for ethylene yield is 1.62%. The proposed model can describe the reaction process of Daqing naphtha pyrolysis and predict the distribution of products.

Key words:

石脑油, 裂解, 集总模型, 动力学, 乙烯

摘要：

通过对自建小型裂解装置实验数据的分析，建立了大庆重石脑油蒸汽热裂解反应8集总动力学物理模型，并用Matlab语言对Marquardt⁺⁺ 法进行编程求取了该物理模型的动力学参数。通过对模型计算值与实验值的相对误差分析表明：原料集总因分得较少，相对误差较大，约为10%，但主要产品产率的最大相对误差不超过7%，其中乙烯产率的平均相对误差为1.62%，说明所建模型较好地反映了大庆重石脑油蒸汽裂解反应规律，可以较好地预测主要产品分布。

关键词:

石脑油, 裂解, 集总模型, 动力学, 乙烯