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研究了在一个内径为400μm管式直线型玻璃微通道中的液-液两相的传质特性,其中去离子水为水相,煤油(溶质是苯甲酸)为油相,氮气为气相。实验研究了表面张力、黏度和气体分散相对体积传质系数的影响,结果表明:在内径为400μm的微通道内,当停留时间为15 s时微通道内的萃取已达到平衡;水相的表面张力和液体黏度显著影响微通道内的传质效率;在液-液系统中引入气相后,水油两相之间的传质效率显著增加。
The mass transfer characteristics of liquid - liquid two phases in a straight glass tube with inner diameter of 400 μm were investigated. The deionized water was water phase, the kerosene (solute is benzoic acid) was oil phase, and the nitrogen was gas phase. The effects of surface tension, viscosity and relative volumetric mass transfer coefficient of gas dispersion were investigated experimentally. The results showed that the extraction of microchannels reached equilibrium when the residence time was 15 s in the microchannels with an inner diameter of 400 μm. The surface of the aqueous phase Tension and liquid viscosity significantly affect the mass transfer efficiency in the microchannels. After the gas phase is introduced into the liquid-liquid system, the mass transfer efficiency between the water and oil phases increases significantly.