间二甲苯氧化反应器建模及模拟

Modeling and Simulation Research on m-Xylene Oxidation Reactor

为深入了解间二甲苯(MX)氧化反应器特性,构建了MX氧化制备间苯二甲酸(IA)的连续气液固三相搅拌釜工业反应器数学模型,并利用Aspen Customer Modeler(ACM)软件平台对该模型进行求解。在模型计算结果与现有工业装置运行数据符合良好的基础上,进行反应器的放大预测,设计了年产150 kt IA的MX氧化装置,并利用计算机实验进行因素考察。计算结果表明,在考虑实际生产设备操作要求的情况下,催化剂浓度的增大、反应压力的升高和反应器内含水量的降低,都会使MX氧化反应转化率及IA收率提高,液相间羧基苯甲醛(3-CBA)质量分数下降,但副反应消耗增大。

To further understand the characteristic of m-xylene(MX) oxidation reactor, the model ofcontinuous gas-liquid-solid industrial stirred tank reactor of MX oxidation to isophthalic acid(IA) wasestablished and solved by using Aspen Customer Modeler(ACM) software. Based on the high accuracy andpredictability validated by the existing industrial plant operation data, an annual 150 kt IA oxidation reactorwas designed and the various factors were investigated by computation. The computation results showed thatboth the conversion of MX and the yield of IA increased while the mass fraction of 3-CBA in the liquidphase of reactor decreased and the side reaction consumptions increased when the concentration of catalystand the pressure of reactor increased or the mass fraction of water decreased.