(146d) Simultaneous Determination of Liquid Dynamic Viscosity and Density of MEA and DEA Aqueous Solutions at Temperatures Between (313-353) K and Pressures up to 30 Mpa

The removal of acid gas impurities such as CO₂ and H₂S from natural, refinery, and synthesis gas streams is an important operation in gas processing. Aqueous solutions of alkanolamine as chemical absorbents have been used in the removal of acid gases for quite a long time, and they are still widely used nowadays. Industrially important alkanolamines are monoethanolamine (MEA), diethanolamine (DEA). The physical properties of solvents such as density and dynamic viscosity are those data sets that are required and important for designing or simulation of an absorption process for CO₂capturing or separation. Data of these thermophysical properties at atmospheric pressure are common, however, there is a lack of data at high pressures. For this reason, in the thermodynamic laboratory from Instituto Politécnico Nacional in Mexico City, a systematic study of behavior of dynamic viscosity and density of pure alkanolamines and its mixtures at temperature up to 353 K and pressures up to 30 MPa is being carried out. In this work, we reported simultaneous determinations of dynamic viscosity and density of MEA and DEA aqueous solutions at temperatures between (313-353) K and up to 30 MPa of pressure. The combined expanded uncertainties were evaluated to be 0.7 % for dynamic viscosity and 0.06 % for density.

Keywords:Dynamic viscosity at high pressures, MEA, DEA, density at high pressures.

* To whom correspondence should be addressed Luis A. Galicia-Luna, E-mail: lgalicial@ipn.mx