Several task-specific ionic liquids（TSILs） with weak alkalinity have been designed based on tetraalkyl-ammonium cation and L-alanine anion([N2222][L-Ala]) for the CO2 absorption.[N2222][L-Ala]has been chosen as a green and efficient activator for methyldiethanolamine（MDEA）.The densities,viscosities and absorption properties of the equimolar[N2222][L-Ala]-MDEA blended absorbents were investigated.Low viscosity and density values support the idea that blended absorbents are preferred in the industrial applications.[N2222][L-Ala]-MDEA behave similarly to the aqueous counterparts but offer more advantages,such as large absorption capacities,fast absorption rate and relatively low damage to the environment.
DAI Yue,WANG Guannan,WU Youting,ZHANG Zhibing (Separation Engineering Research Center,School of Chemistry and Chemical Engineering, Nanjing University,Nanjing 210093,Jiangsu,China)
