Experimental And Theoretical Study On The Viscosity Of Carbonated N-methyldiethanolamine-diethanolamine And2-amino-2-methyl-1-propanol-diethanolamine Aqueous Solutions

The viscosities of carbonated2-amino-2-methyl-1-propanol (AMP)-diethanolamine(DEA) and N-methyldiethanolamine (MDEA)-DEA aqueous solutions were measured byusing a NDJ-1rotational viscometer. For AMP-DEA-CO2aqueous solutions, thetemperature, total mass fractions of amines and CO2loading respectively ranged from303.15K to323.15K，0.3to0.4and0.1to0.5. For MDEA-DEA-CO2aqueous solutions,the temperature, total mass fractions of amines and CO2loading respectively rangedfrom293.15K to323.15K，0.2to0.5and0.25to0.5.A modified Grunberg-Nissanequation and the Weiland equation were used for the correlation and prediction of theviscosities, and the calculated results agree well with the experiments. The effects oftemperature, amine concentration and CO2loading on the viscosities of carbonatedaqueous solutions were demonstrated on thebasis of experiments and calculations.The results showed that the viscosities of the carbonated aqueous solutions increasemonotonically with increasing of concentration of alkanol amines and decreases withincreasing temperature. By taking into account the contribution of CO2loading, themodified Grunberg–Nissan equation can correctly describe the temperature, amineconcentration and CO2loading dependence of the viscosity of the carbonated AMP-DEAand MDEA-DEA aqueous solutions.