Viscosity Measurement and Correlation of Unloaded and CO2-Loaded Aqueous Blend of Monoethanolamine and Piperazine

Abstract

This work provides new viscosity data of unloaded and partially carbonated aqueous monoethanolamine-piperazine (MEA-PZ) solutions at temperatures between 303.15 and 373.15 K and at a N2pressure of 400 kPa. In both cases, the viscosity of MEA-PZ solutions was measured at three different concentrations of PZ at 5, 10, and 15 wt % and by keeping the concentration of MEA constant at 30 wt %. For the carbonated solutions, measurements were performed by varying the concentration of CO2between 0.13 and 0.55 mol of CO2/mol of amines. A simple empirical equation and a modified Setschenow equation used to correlate the viscosity of unloaded and CO2-loaded MEA-PZ solutions, respectively, provide a good representation of the experimental data.