乙烷-丙烷混合裂解不同维度的数值模拟  

Numerical Simulation of Radical Mechanism Reaction in Ethane-Propane Mixed Pyrolysis Models in Different Dimensions

作　　者：李金莲[1] 刘鸿艳 吴红军[1] 李金山 张永军[3] 张红梅[1] Li Jinlian;Liu Hongyan;Wu Hongjun;Li Jinshan;Zhang Yongjun;Zhang Hongmei(Provincial Key Laboratory of Oil&Gas Chemical Technology,Northeast Petroleum University,Daqing,Heilongjiang 163318,China;Daqing Green Agricultural Products Monitor Center,Daqing,Heilongjiang 163000,China;China National Petroleum Corporation,Daqing Chemical Research Center,Daqing,Heilongjiang 163714,China)

机构地区：[1]东北石油大学化学化工学院石油与天然气化工省重点实验室,黑龙江大庆163318 [2]大庆市绿色农产品监测中心,黑龙江大庆163000 [3]中石油大庆化工研究中心,黑龙江大庆163714

出　　处：《化学世界》2024年第1期14-20,共7页Chemical World

基　　金：东北石油大学校青年基金(No.2019QNL-35);大庆市指导性科技计划(No.zd-2021-39)资助项目。

摘　　要：随着乙烯原料向着轻质化发展,乙烷、丙烷成为重要的裂解原料,乙烷-丙烷混合裂解自由基反应机理的研究对乙烯原料优化具有重要意义。利用FLUENT模拟软件对乙烷-丙烷混合裂解自由基反应机理进行一维和二维模拟,根据一维、二维模型轴向和径向的流速、温度、原料及产物浓度分布,分析其混合裂解规律。径向的传递过程会降低裂解温度,所需供热量减少,同时径向自由基的返混促进了管中心原料的裂解,因此二维模型中乙烯和甲烷的浓度高于一维模型。乙烷-丙烷混合裂解的链引发阶段只有丙烷参与,乙烷参与了链传递过程,反应体系内自由基需要一定量的积累后才生成乙烯和丙烯。With the development of ethylene raw materials,ethane and propane become important cracking raw materials,and the reaction mechanism of ethane-propane mixed cracking radical is great significance to the optimization of ethylene raw materials.Using FLUENT simulation software for one-and two-dimensional simulation,comparative analysis of tube axial flow rate,temperature,raw material and product concentration distribution.The results show that radial addition reduces the cracking temperature.Radical mixing can promote the central axial material cracking so that the concentration of ethylene and methane is higher than one-dimensional simulation.The chain initiation phase of mixed cracking of ethane-propane is only involved,ethane will participate in the chain transmission process,and the free radicals in the reaction system need a certain amount of accumulation to produce ethylene and propylene.

关 键 词：乙烷 丙烷 混合裂解 自由基反应机理 数值模拟 

分 类 号：TQ028.8[化学工程]