Density and viscosity of aqueous solutions of Methyldiethanolamine (MDEA) + Diethanolamine (DEA) at high pressures. (September 2020) - Concepción, Eduardo I.
Highlights: Densities and viscosities of MDEA + DEA + water mixtures at mass fractions of amines 0.1/0.3 and 0.3/0.1 are reported. These properties were measured from (313.15 to 393.15) K and pressures up to 100 MPa for viscosity and 140 MPa for density. Densities were correlated using Tamman-Tait equation and VFT was used to correlate viscosity. These models give standard deviations in agreement with the uncertainties. Abstract: In this paper, high pressure densities (up to 140 MPa) at six different temperatures (from 293.15 K to 393.15 K) are presented and viscosity measurements (up to 100 MPa) at five isotherms in the range of 313.15 K to 393.15 K are also reported, both for two aqueous solutions of MDEA (1) + DEA (2) with mass fractions of w1 = 0.1; w2 = 0.3 and w1 = 0.3; w2 = 0.1. Densities were measured using a vibrating tube densimeter (Anton Paar DMA HPM) with an expanded uncertainty ( k = 2) better than 0.7 kg·m −3 . Viscosity measurements were obtained using a falling body viscometer whose expanded relative uncertainty ( k = 2) ranges from 2.5% for the highest viscosity till 3.2% for the lowest.