Experiments and model for the viscosity of carbonated 2-amino-2-methyl-1-propanol and piperazine aqueous solution

•The viscosities of the carbonated AMP-PZ aqueous solutions were measured.•The experiments were modeled satisfactorily by using the Weiland equation.•The influence of the mass fractions of amines on the viscosity was illustrated.•The temperature and CO2 loading dependences of the viscosity were demonstrated.

The viscosities (η) of carbonated 2-amino-2-methyl-1-propanol (AMP)-piperazine (PZ) aqueous solutions were measured by using a NDJ-1 rotational viscometer, with temperatures ranging from 298.15 K to 323.15 K. The total mass fraction of amines ranged from 0.3 to 0.4. The mass fraction of PZ ranged from 0.05 to 0.10. The Weiland equation was used to correlate the viscosities of both CO2-unloaded and CO2-loaded aqueous solutions and the calculated results agreed well with the experiments. The effects of temperature, mass fractions of amines and CO2 loading (α) on the viscosities of carbonated aqueous solutions were demonstrated on the basis of experiments and calculations.