PX液相氧化制TA微界面强化初探  

Oxidation of p⁃xylene to terephthalic acid project by micro⁃interfacial mass transfer intensification

作　　者：令通 田洪舟 吕权 李夏冰 李磊[1] Tong Ling;Hongzhou Tian;LüQuan;Xiabing Li;Lei Li(School of Chemistry and Chemical Engineering,Nanjing University,Nanjing,210023,China;Nanjing Institute of Microinterface Technology Co.,LTD,Nanjing,210047,China)

机构地区：[1]南京大学化学化工学院,南京210023 [2]南京延长反应技术研究院有限公司,南京210047

出　　处：《南京大学学报（自然科学版）》2021年第4期648-653,共6页Journal of Nanjing University（Natural Science）

基　　金：江苏省创新能力建设计划-学科重点实验室建设项目(BM2018007)。

摘　　要：通过构建对二甲苯(PX)空气液相氧化制对苯二甲酸(PTA)微界面体系构效调控数学模型,探讨体系气泡大小对气泡运动、氧气传质和PX宏观反应速率的影响.理论计算结果表明,随着体系气泡尺度的减小,气液相界面积和体积传质系数均大幅上升,PX宏观反应速率亦有较大增加.在操作温度和操作压力分别为186.3℃和1.2 MPa时,若体系气泡Sauter平均直径d_(32)由5.0 mm减小至0.50 mm,气液相界面积、体积传质系数和PX宏观反应速率分别增大16倍、30倍和1.6倍.此外,冷模试验表明,模拟体系可形成典型的微界面体系.The effects of bubble size on bubble movement,oxygen mass transfer and p-xylene reaction rate were investigated by establishing a mathematical model of the micro-interface system for the oxidation of p-xylene to terephthalic acid in liquid phase.Theoretical calculation results show that with the decrease of the bubble size,the gas-liquid interfacial area,the volumetric mass transfer coefficient and the p-xylene macroscopic reaction rate all increase significantly.When the average diameter d_(32) of the bubbles decreases from 5.0 mm to 0.50 mm at the operating temperature and pressure of 186.3℃and 1.2 MPa,the gas-liquid interfacial area,volumetric mass transfer coefficient and p-xylene macroscopic reaction rate increase 16,30 and 1.6 times,respectively.In addition,the cold model test shows that the simulated system can form a typical micro-interface system.

关 键 词：对二甲苯氧化 微界面 气 泡 数学模型 

分 类 号：TQ03-3[化学工程]