Alcohol amine solutions have a high absorption capacity and rate for CO(2) capture, however, there are some shortcomings such as high energy-consumption and low stability. To enhance CO(2) capture performance of aqueous MEA, a functional ionic liquid ([NH(2)e-mim][BF(4)]) was introduced based on the advantages for CO(2) capture. Absorbents were prepared with the molar concentration ratio of [NH(2)e-mim][BF(4)] to the 30 vol% aqueous MEA of 0 : 10, 1 : 9, 2 : 8, 3 : 7, 4 : 6 and 6 : 4. The density and the viscosity of the investigate...