The microinterface intensified batch and continuous processes for synthesis of propylene carbonate from CO2 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 to μm 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 CO2 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(CO2)∶n(PO)=1.25∶1,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/CO2/气液体系特征参数/传质强化
Key words
microinterface intensified reactor/propylene carbonate/CO2/gas-liquid system characteristics/mass transfer intensification
万方数据