Solubility (at Low Partial Pressures), Density, Viscosity, and Corrosion Rate of Carbon Dioxide in Blend Solutions of Monoethanolamine (MEA) and Sodium Glycinate (SG)

The influence of the sodium glycinate (SG) on the solubility of carbon dioxide (CO2) in monoethanolamine (MEA) was investigated. The equilibrium solubilities of CO2 into blend solutions of SG and MEA were measured experimentally with a stirred batch reactor for the molar ratio of SG between 0.2 and 0.8 in total blend concentration (C-T) 2.5 mol.dm(-3) (M) over the temperature and CO2 partial pressure ranging from (298 to 313) K and (0 to 35) kPa, respectively. The results of the CO2 solubility are expressed as CO2 loading (mol CO2/mol blend solution) as a function of partial pressure of CO2 for all experimental runs. The densities and viscosities of the blend solutions were measured at the same conditions of the solubility measurement. Some corrosion rate tests were also performed on carbon steel at a temperature of 308K. Experimental results showed that, with increasing the molar ratio of SG in total blend concentration, the viscosity and corrosion rate of blend solutions increase.