丙烯氨氧化反应动力学研究

Study on Propylene Ammonia Oxidation Reaction Kinetics

为探索丙烯氨氧化法合成丙烯腈的反应动力学,本研究根据温度为425℃,压力为156 k Pa,进料气速为0.743 m/s,进料C_(3)H_(6),NH_(3),O_(2)和N_(2)的物质的量之比为0.086:0.1043:0.17:0.6397,即氨烯比为1.213:1,氧烯比为1.977:1的条件下得到的实测数据,对丙烯氨氧化合成丙烯腈反应动力学进行了模型构建。进而采用CHEMKIN动力学模拟软件构建了流化床模型,获得类燃烧的强氧化放热丙烯氨氧化反应的动力学方程及参数。此外,还根据操作条件对反应动力学参数的影响以及深度氧化对丙烯氨氧化反应的影响,将模拟数据和实测数据进行对比,结果表明两者具有可比性。本研究结果可为丙烯氨氧化反应大型工程化和反应器设计提供理论指导。

To explore the reaction kinetics of synthesizing acrylonitrile through propylene ammoxidation,a kinetic model of propylene ammoxidation reaction to acrylonitrile was be constructed in this study based on the measured industrial data,which was obtained under the operation conditions including temperature of 425℃,pressure of 156 kPa,feed gas rate of 0.743 m/s,feed composition C_(3)H_(6):NH_(3):O_(2):N_(2)of 0.086:0.1043:0.17:0.6397,that is ammonia to olefin ratio of 1.213:1 and oxygen to olefin ratio of 1.977:1.Furthermore,a fluidized bed model was established using CHEMKIN chemical kinetic simulation software to obtain the kinetic equation and parameters of the strong oxidation exothermic propylene ammonia oxidation reaction similar to combustion.Also,the comparison between simulation results and industrial data were discussed in terms of the influence of the operating conditions on the reaction kinetic parameters and the effect of deep oxidation on the propylene ammoxidation reaction,and the results showed that the two were comparable.The results from this study provide theoretical guidance for the large-scale engineering and reactor design of propylene ammonia oxidation reaction.