An Experimental Investigation of Overall Mass Transfer coefficient (KGa) of CO2 absorption using Monoethanolamine (MEA) and Diethanolamine (DEA) in a Bubble Column Reactor (BCR)


In this work, an absorption technology was used actually to investigate the mass transfer coefficient of carbon dioxide from a gaseous mixture (air, carbon dioxide) in blended solution Monoethanolamine (MEA) and Diethanolamine (DEA) in a bubble column reactor (BCR). The bubble column reactor(BCR) was made of Plexiglas with 1.5 m high and 0.1 m inside diameter.The overall mass transfer coefficient (KGa) was evaluated at different operating conditions, gas flow rate, air Flow rate, liquid flow rate. Where the gas flow rates were 10, 15, and 20 L /min, air flow rate 100,150 and 200 L/h, and liquid flow rate 5,10,15 L /min. This experiment by using a continuous process with helping the centrifugal pump. High-performance gas chromatographic (GC) was performed to evaluate CO2 loading during absorption experiment . The experimental results have shown that the CO2 loading in range of 0.581-1.367 (mol CO2 /mole amine), and the maximum value of overall mass transfer coefficient (KGa was 0.04 S-1).