Lab-scale Characterization of CO2 Absorbents Containing Various Amine Species

Characterizations of CO2 absorbents containing various amine species were carried out with their simple aqueous solutions and binary mixed solutions. Absorption and desorption process were demonstrated under the temperature of 50 °C and 80 °C, respectively. All absorbents were characterized using two indexes; absorption rate and release ratio. The results show typical primary amines have high absorption rate and low release ratio, while tertiary amines has low absorption rate and high release ratio. The characteristics of mixed absorbents changed continuously by changing compositions of mixed amine species. The result of quantitative analysis show negative relationship between bicarbonate formation and release ratio, indicating bicarbonate formation does not affect directly to release ratio of the CO2 absorbent.