Void fraction and pressure drop of gas-liquid two-phase flow in microchannel have remarkable influence on performance of mass and heat transfer

and also are important design parameters of microreactor.A high speed camera and a pressure measuring system were used to investigate void fraction and pressure drop of CO2 chemical absorption by monoethanolamine(MEA)aqueous solution.The effects of gas/liquid flow rate and chemical reaction rate were studied under Taylor flow.Experimental results showed that

for a given liquid phase flow rate

both void fraction and pressure drop increased with increasing gas phase flow rate

and void fraction decreased while the pressure drop increased with increasing chemical reaction rate.For a given gas flow rate

void fraction decreased while pressure drop increased with increasing liquid phase flow rate and chemical reaction rate.Two semi-theoretical models were proposed for predicting void fraction and pressure drop of gas-liquid two-phase flow accompanied with chemical absorption in microchannel

respectively.The average deviations of the models were 15.79% and 11.12% respectively for void fraction and pressure drop

showing good prediction.