Solubility and viscosity for CO2 capture process using MEA promoted DEAE aqueous solution

• Solubility of CO2 in MEA promoted DEAE aqueous solution was measured.
• Mass fraction and temperature dependences of solubility were illustrated.
• Viscosities of carbonated MEA–DEAE solutions were measured and calculated.
• Temperature, mass fraction and CO2 loading dependences of viscosity were illustrated.

The saturated solubility of CO2 in monoethanolamine (MEA) promoted 2-diethylaminoethanol (DEAE) aqueous solution was investigated at temperatures ranging from (303.2 to 323.2) K. The mass fraction and temperature dependences of the saturated solubility and CO2 loading are illustrated. The viscosities of both CO2-unloaded and CO2-loaded DEAE–MEA aqueous solutions were measured and then calculated by using the Weiland equation. The effects of temperature, mass fraction and CO2 loading on viscosities are demonstrated.