Structure and Activity Relationships for Amine Based CO_2Absorbents

摘要

A study to determine the structure and activity relationships of amine based CO_2 absorbents was performed. The absorption of pure CO_2 was measured to assess the total capacity and rate of absorption for various amine based absorbents. Experimental results show that the increase in the chain length between amine and different functional groups, decrease the initial absorption rate in most cases. Whereas, the absorption capacity is increased. This effect shows the steric hindrance on the reaction site in amine based absorbents. Effect of increase in the number of amine group in amine based absorbent, increases the capacity as well as increases the initial absorption rate. Substitution of alkyl group at a-carbon to amine group increases capacity of CO_2 absorption. Aromatic amine substituted by alkyl group at 2nd and 5th position shows increase in both initial absorption rate and capacity.