Intensification of Liquid-Liquid Two-Phase Mass Transfer by Gas Agitation in a MicroChannel

摘要

In this experiment,the inert gas is used to agitate two immiscible fluids in micro-channels.The mass transfer performances with or without gas agitation are investigated.30% TBP (in kerosene)-acetic acid-water is chosen as testing system,and nitrogen as agitating gas.The superficial velocities of the immiscible liquid-liquid two phases and gas phase are varied in the range from 0.02 to 1.2 m/s,and 0 to 3.0 m/s,respectively.In microchannels,with enough gas agitating intensity,high dispersion between two immiscible liquid phases can be obtained.The overall volumetric mean mass transfer coefficients are two-folds higher than those without gas agitating,which are in the range of 3.8-30.6 s~(-1) .Some parameters which impact on the mass transfer process,such as the mixture superficial velocity of the immiscible liquid-liquid two phases,the gas superficial velocity,the microchannel structure,the gas inlet locations and the sampling time are experimentally investigated.Kmicromixing,microchannel,gas agitation,microreactor,interfacial area