微界面强化CO_(2)和环氧丙烷催化合成碳酸丙烯酯  

Catalyzed synthesis of propylene carbonate from CO_(2)and propylene oxide by microinterface reaction intensification technique

作　　者：周驰 门广平 朱俊超 王欣妍 李磊[1,2] ZHOU Chi;MEN Guangping;ZHU Junchao;WANG Xinyan;LI Lei(School of Chemistry and Chemical Engineering,Nanjing University,Nanjing 210023,Jiangsu Province,China;Nanjing Yanchang Reaction Technology Research Institute Co.,Ltd.,Nanjing 210047,Jiangsu Province,China)

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

出　　处：《化学工程》2024年第10期7-12,共6页Chemical Engineering(China)

基　　金：江苏省研究生科研与实践创新计划项目(编号:SJCX23_0013)的支持。

摘　　要：应用离子液体催化剂,建立CO_(2)与环氧丙烷合成碳酸丙烯酯的微界面强化间歇和连续工艺。优选离子液体催化剂种类,采用在线成像测量技术观测MIR(微界面强化反应器)和BCR(鼓泡塔反应器)的气液体系特征参数,对比不同反应条件下2种反应器的反应效能,讨论传质强化对PC收率的影响。结果表明:相较于鼓泡塔反应器,微界面反应强化技术将反应体系气液界面尺度由mm-cm级调控为μm级,大幅度提高了相界面积和质能传递效率,导致相同间歇反应工况下反应速率提升77%,CO_(2)利用率提高40%;在较温和条件(110℃,2 MPa)、催化剂用量(摩尔分数)0.375%、空时3.3 h、n(CO_(2)):n(PO)=1.25:1下进行连续化反应,PC收率稳定在98%以上。研究结果为微界面反应强化技术应用于碳酸丙烯酯的工业化生产提供了数据支撑。The microinterface intensified batch and continuous processes for synthesis of propylene carbonate from CO_(2)and propylene oxide were established by using ionic liquid catalyst.The type of ionic liquid catalyst was optimized,and the gas-liquid system characteristic parameters of MIR(microinterface intensified reactor)and BCR(bubble column reactor)were observed by online measuring and imaging system.The reaction efficiency of the two reactors under different reaction conditions was compared,and the effect of mass transfer enhanced on PC yield was discussed.The results show that compared with BCR,MIR can control gas-liquid interface scale of the reaction system from mm-cm level toμm level,which greatly improves the phase interface areas and mass energy transfer efficiency,resulting in a 77%increase in reaction rate and a 40%increase in CO_(2)utilization under the same batch reaction condition.Under relatively mild conditions(110℃,2 MPa),catalyst dosage(molar fraction)0.375%,space time 3.3 h,n(CO_(2))n(PO)=1.251,the PC yield is stable above 98%.The research results provide data support for the application of microinterface intensification reaction technology in the industrial production of PC.

关 键 词：微界面强化反应器 碳酸丙烯酯 CO_(2) 气液体系特征参数 传质强化 

分 类 号：TQ021.4[化学工程] TQ225.5