(168i) Dispersion and Mass Transfer Performance of Gas-Liquid Systems in Microchannels

Gas-liquid micro-dispersion flow has recently caught the attention of many researchers for its applications in chemical engineering industry, biological industry, metallurgy, and so on. Similarly, miniaturization is becoming one of the most important directions in chemical engineering since the 21th century. Dispersion and mass transfer performance of multiphase flow systems in micro-structured chemical systems are becoming one of the most important research directions in this field. In this work the characteristic of gas-liquid micro-flow is discussed firstly. Flow patterns and bubble size change for gas-liquid dispersed systems were studied. Some factors including dispersion method, the physical properties of the liquid phase and operation conditions were investigated to understand the mechanism of the mciro-dispersion process. Mathematical models were developed to predict the dispersion size. Mass transfer performances of gas-liquid micro-dispersion systems are also studied in this work, showing a great enhancement comparing to traditional gas-liquid dispersed systems. The intensification of mass transfer performance provides potentially application in gas-liquid multiphase reaction processes.