结构导向集总方法构建直馏汽油催化裂化动力学模型  

Construction of kinetic model for catalytic cracking of direct distillation gasoline using structure oriented lumping method

作　　者：祝然[1] 沈本贤[1] 刘纪昌[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：《石化技术与应用》2012年第6期483-487,共5页Petrochemical Technology & Application

摘　　要：采用结构导向集总(SOL)新方法构建了直馏汽油催化裂化改质的反应动力学模型。模型选取74种分子组成原料矩阵,根据催化裂化正碳离子反应机理,制定了42种反应规则构建反应网络。采用矩阵变换的形式求解反应网络,从而得到产物分子矩阵。通过对产物矩阵中的分子归类,获得产物分布及汽油族组成。采集实验室小型固定流化床催化裂化数据,对模型计算结果进行验证。结果表明,该模型能较为准确地预测产物分布及汽油族组成;在温度及进料组成改变时,模型适应性较好;模型同样能较准确地预测汽油研究法辛烷值。A kinetic model for direct distillation gasoline catalytic cracking was developed according to a new structure oriented lumping （SOL）method. 74 kinds of molecules were selected to describe feedstock. 42 kinds of reaction rules were established to construct reaction networks in this model based on the carbonium ion mechanism of catalytic cracking. Modified matrix transformation method was used to solve reaction networks to obtain product matrix. Product distribution and gasoline group composition could be obtained by classifying the molecules in product matrix. The experiment data of direct distil- lation gasoline catalytic cracking in a fixed fluid bed unit was used to verify, the model. The results showed that the predicted product distribution and gasoline group composition agreed well with the experimental data. And the model had better adaptability when temperature and feedstock composition changed, and could also predict research octane number of gasoline.

关 键 词：结构导向集总 直馏汽油 催化裂化 动力学模型 

分 类 号：TE62.4[石油与天然气工程—油气加工工程]