相分離型CO₂吸収材を用いた吸収速度の実験的評価

抄録

The aqueous of amine CO₂ capture processes can remove CO₂ from exhaust gas in some industrial process. The major aqueous amine absorbent which is applied in industrial process are primary amines, the secondary amines and the tertiary amines. The aqueous of amine CO₂ capture processes are consumed thermal energy for CO₂ desorption. A previous study has revealed that a lot of energy for CO₂ desorption are CO₂ desorption heat, sensible heat of the aqueous for desorption temperature and the heat of vaporization the aqueous absorbent. We developed a new type of CO₂ absorption solvent which transforms into two liquids phase with CO₂ absorption. In this study, we evaluated the absorption rate of the new absorbent and MEA absorbent, and calculated the constant of absorption rate from CO₂ transport phenomena model. From the results, the coefficient of absorption rate was obtained 2.8 mol/(m²·sec)(before separation), 13 mol/(m²·sec)(after separation), 10 mol/(m²·sec)(MEA 30wt%), respectively. The new absorbent had high absorption rate compared with MEA absorbents.