Mass Transfer through Gas-Liquid Interface in a Micro Channel

Experimental studies on mass transfer through the gas-liquid interface in a micro channel were carried out to investigate gas absorption rates against flow patterns and the efficiency of gas absorption. The micro channel used was a glass capillary tube which had a diameter of 0.5 mm and carbon dioxide was absorbed into distilled water in the micro channel. The superficial velocities of gas and liquid were widely changed to form various flow patterns in the channel. The results show that the gas absorption is remarkably progressed as the gas flow rate increases. The volumetric mass transfer coefficient, kLa, generally has a linear relationship with gas superficial velocity, regardless of the liquid flow rate and flow patterns. kLa obtained in the micro channel is much larger than those in the conventional methods.