Measurement and Correlation of the Physicochemical Properties of Novel Aqueous Bis(3-aminopropyl)amine and Its Blend with N-Methyldiethanolamine for CO₂ Capture

Abstract

Physicochemical properties such as density and viscosity of aqueous novel bis(3-aminopropyl)amine (APA) and an aqueous novel blend of N-methyldiethanolamine (MDEA) and APA solutions as well as solubility and diffusivity of N 2 O into these binary and ternary solutions were measured from temperature T = 298 to 323 K at atmospheric pressure. In this study, experiments cover the molality range for APA = 0−1.291 mol·kg −1 and MDEA = 2.915−4.416 mol·kg −1 . The diffusivity and solubility experiments were conducted with a wetted wall column absorber and Corning glass equilibrium cell, respectively. The experimental binary and ternary density data as well as binary viscosity data were correlated by Redlich−Kister equation whereas ternary viscosity data were correlated by the Grunberg and Nissan model. On the other hand, solubility and diffusivity were correlated with different models. All of the correlations based on the different model performed are capable of adequately predicting experimental physicochemical data.

Analysis of equilibrium CO 2 solubility in aqueous APDA and its potential blends with AMP / MDEA for postcombustion CO 2 capture

“…The higher CO 2 loading in the aqueous APDA solution can be the result of six electron donating alkyl group present in the APDA molecule. The presence of two amine groups at either end does not influence each other and are equally reactive with higher pKa value (10.85) 15 . Also the basicity of APDA is higher compared to other conventional amines and hence undergoes the zwitterion deprotonation faster resulting in higher equilibrium solubility.…”

“…13,14 Recently, N-(3-aminopropyl)-1,3-propanediamine (APDA) a polyamine containing two primary amine group and one secondary group has been explored as a potential activator for CO 2 removal application. 15,16 It possesses some favorable traits such as low vapor pressure along with high pKa value which further results in higher reaction rates and absorption capacity. Das et al, 16 investigated the kinetics of APDA-CO 2 reaction over a wide range of experimental conditions.…”

Measurement and Correlations of Physicochemical Properties of the Novel Solvent Tris(2-aminoethyl) amine and Its Blend with N-Methyldiethanolamine and 2-Amino 2-Methyl-1-Propanol

“…It represents that the activator has more affinity toward N 2 O. To correlate the solubility data, the Arrhenius-type equation is proposed where solubility is considered to be a function of concentrations (molarity) of TAEA ( M 1 ) solutions and MDEA/AMP ( M 2 ) and temperature ( T ) as given below: , K H‑N2O is the Henry’s law constant of N 2 O, T is temperature in Kelvin, and a , b , c , and d are the regression parameters. If the concentration of MDEA or AMP is zero, then it represents the binary system of TAEA and water.…”

“…It represents that the activator has more affinity toward N 2 O. To correlate the solubility data, the Arrhenius-type equation is proposed where solubility is considered to be a function of concentrations (molarity) of TAEA (M 1 ) solutions and MDEA/AMP (M 2 ) and temperature (T) as given below: 9,10 The standard uncertainties u are u(T) = 0.…”

“…Major conventional solvents, namely, primary amine (monoethanolamine, MEA), secondary amine (diethanolamine, DEA), tertiary amine ( N -methyl diehanolamine, MDEA), and also the amine (2-amino-2-methyl-1-propanol, AMP), which is sterically hindered, have been used for several industrial gas treatment units. , Still, these types of amines also have various downsides like degradation of the solvent, higher energy requirement for regeneration, and eroding to the equipment leads to the economically unfavorable utilization of them. − To overcome these problems, investigators have proposed blended solvents as striking to remove any acidic impurities in the sour gas streams. Many researchers have proposed several activators like piperazine (PZ), 1-(2-aminoethyl)­piperazine (PZEA), 1-methyl piperazine, and bis­(3-aminopropyl)­amine (APA) − to blend with these commercially available alkanolamines solvents because of possible increase in total CO 2 loading capacity and reduced cost of regeneration. − In the current work, we propose a novel activator tris­(2-aminoethyl) amine or 2,2′,2″-triaminotriethylamine (TAEA). It has three primary and one tertiary amine groups, exhibiting high thermal stability and, low vapor pressure, which may provide a higher capacity of CO 2 per mole of amine.…”