Abstract
Abstract The solvent blend of potassium carbonate and hindered cyclic amines having higher solubility, 500 g/L water at 25 °C, and boiling point over 150 °C, SEFY-1 (Save Earth’s Future by Yoon), has been investigated as an alternative of alkanolamines such as MEA or AMP/PZ for CO 2 capture from power plants using coal and industries having exit CO 2 concentration below 28 vol%. SEFY-1 offers several advantages in comparison with previous solvents because of very low heat of absorption, low volatility, high resistance to thermal and reactive degradation by SO 2 , so cheaper than KS-1 solvent, no formation of salts and a lot of application for various industries having different CO 2 feed concentration such as power plant (8∼13%), steel (15∼20%), cement (15∼25%) and chemical industries. We concluded many advantages of SEFY-1 by various experiment, vapor liquid equilbrium test, corrosion test, reaction calorimeter, wetted wall column test, unit operation of absorption tower and so on. Specially, the heat of absorption, 1.36 GJ/tCO 2 , of SEFY-1 was analyzed by Mettler Toredo Reaction Calorimeter. This is innovative result in comparison with commercial solution, MEA 30 wt% (1.93 GJ/tCO 2 ) and KS-1 (1.55 GJ/tCO 2 ).
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