基于结构导向集总的催化裂化MIP工艺反应动力学模型Ⅰ.模型的建立和验证  

Reaction kinetic model for catalytic cracking MIP technology using structure oriented lumping method Ⅰ. Establishment and verification of the model

作　　者：陈华[1] 皮志鹏 刘逸锋 刘纪昌[1] 沈本贤[1] 

机构地区：[1]华东理工大学化学工程联合国家重点实验室,上海200237

出　　处：《石油化工》2017年第4期395-402,共8页Petrochemical Technology

基　　金：国家自然科学基金项目(21476082)

摘　　要：基于结构导向集总方法,设计了包含烃类结构和杂原子结构的22个结构向量,构建了代表催化裂化原料分子组成的14 692种典型分子的结构向量,根据催化裂化反应机理和MIP工艺特征,编制了催化裂化反应规则,构建了反应网络,通过改进的Runge-Kutta法求解,建立了基于结构导向集总的分子尺度的MIP工艺反应动力学模型,通过MIP装置工业数据验证了模型的可靠性。实验结果表明,此模型与传统的催化裂化反应动力学模型相比,在反应网络中引入反应热效应,可更准确地描述提升管反应器中反应温度的变化及其对催化裂化反应过程的影响;模型的可靠性验证实验表明,预测值与工业数据的最大误差在1.0%左右,温度的预测误差不超过2℃。22 structural increments including hydrocarbon structure and heteroatom structure were designed based on the structure oriented lumping method, and 14 692 kinds of molecules in catalytic cracking feedstock were selected to form a matrix. According to the reaction mechanisms of catalytic cracking and the characteristics of MIP（maximizing iso-paraffins） technology, the reaction rules of the catalytic cracking were compiled. The reaction network was proposed and solved by the modified Runge-Kutta method, and the kinetic model with molecular level was established. It was showed that, compared with traditional kinetic model of catalytic cracking, the reaction heat was introduced into the reaction network, so the model could describe the temperature variation and the effect of the temperature variation on the reaction process more accurately. The reliability of the model was verified, the maximum absolute difference between the calculated values and actual values was about 1.0% and the temperature error was less than 2 ℃.

关 键 词：催化裂化 MIP工艺 结构导向集总方法 反应动力学模型 

分 类 号：TE624.41[石油与天然气工程—油气加工工程]