Viscosity measurements and modeling of loaded and unloaded aqueous solutions of MDEA, DMEA, DEEA and MAPA

- Viscosity of unloaded MDEA, DMEA, DEEA and MAPA aqueous solution were measured.
- Viscosity of CO2 loaded MDEA, DEEA and MAPA aqueous solution were measured.
- The NRTL-DVIS model was used to correlate the data both loaded and unloaded.
- The model predicts the experimental data with reasonable accuracy.

Viscosities of aqueous solutions of 4 amines aimed at CO2 capture by absorption were measured in the temperature range 20-80 °C and for the whole range of compositions. In addition, measurements for loaded solutions up to 1 mol CO2/mole amine for three of the amines systems were also performed. The data were, when possible, compared to literature data and good agreement was found. Both the unloaded and loaded data were modeled using the NRTL-DVIS correlation. The model was able, in both cases, to accurately represent the experimental data except for the 17.9 wt.% MAPA loaded system. The average deviations, calculated as AARD between experimental and predicted values, were for all other cases within 5-6%.