Investigation of overall mass transfer coefficient of CO₂ absorption in to aqueous blended Monoethanolamine (MEA), Diethanolamine (DEA) and Triethanolamine (TEA) measured in Bubble column Reactor solution

Abstract

Mixtures of different types of amine solution (primary Monoethanolamine (MEA), secondary : diethanolamine (DEA) and tertiary: triethanolamine (TEA) were experimentally used to investigation the overall mass transfer coefficient (KGa ) at different operating parameters. The experiments were made in a bubble column reactor (BCR) with 1.5 m in high and 0.1 m inside diameter as a gas-liquid contactor at 25°C and atmospheric pressure, using a simulation gaseous mixture (air, carbon dioxide) with recycle stream (circulation process). For efficient experimentation, the Taguchi method was applied for experimental design. A four factor and three levels was chosen for this study and it was exploded using L9 (34) orthogonal array design. These parameters for circulation process were namely: gas flow rate 10,15, and 20L/min, air flow rate100,150, and 200 L/h, liquid flow rate 5,10, and 15 L/min and time absorption time 30,60, and 90min. To understand the effectiveness order of different operating parameters, two factors namely, overall mass transfer coefficient (KGa ), and CO 2 loading (α) are to be exploded. A Shimadzu GC-8A Gas Chromatograph with thermal conductivity detector was used to measure the CO 2 concentration absorbed in aqueous blended solution. As per Taguchi analysis the significance sequence influencing the parameter and optimum condition can be determined. The maximum value for CO 2 loading was 3.439 (mol CO2/mol amine) at 20 L/min gas flow and 15 L/min liquid flow, and 200 L/h air flow for 60 min from absorption time. The performance was evaluated in terms of the overall mass transfer coefficient, KGav , the results show that max value of KGa was 0.08 S −1

Investigation of the Effects of Salt and Magnetic Field on Mass Transfer Coefficient of Water Evaporation under Different Conditions

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