AMP–CO2–water thermodynamics, a combination of UNIQUAC model, computational chemistry and experimental data

Heat of absorption of carbon dioxide in mixtures of 2-amino-2-methyl-1-propanol and organic solvents

“…The heat of absorption reported for AMP in EG and in aqueous solutions shows a slower decrease, which is probably due to the formation of bicarbonate in aqueous AMP solutions and the contribution from the reaction of EG with the zwitterion (RNH + 2 COO − ), at higher loadings. Kim et al (2013) reported a heat of absorption for an aqueous solution of 30 wt% AMP of −63.95 kJ/mol CO 2 at a CO 2 loading of 0.862 mol CO 2 /mol AMP at 25 • C. This is slightly higher than the values reported by Mehdizadeh et al (2013), but lower than those reported by Arcis et al (2008) for the same AMP concentration. Fig.…”

“…Fig. 7 shows the results for 15 wt% AMP in NMP or TEGDME, at 50 • C, and those reported in the literature for AMP in ethylene glycol (EG) (Zheng et al, 2013), and aqueous solutions of AMP (Arcis et al, 2008;Gabrielsen et al, 2006;Mehdizadeh et al, 2013). Zheng et al (2013) reported a correlation for calculating the heat of absorption for solutions of AMP and EG, as a function of temperature and CO 2 loading, that was derived from the solubility data determined in that work, using the Gibbs-Helmholtz equation.…”

“…The data reported by Arcis et al (2008) for aqueous solutions of 15 and 30 wt% AMP were determined using flow calorimetry, and the reported enthalpy of solution corresponds to the integral heat of absorption, as defined in the present work. The heat of absorption for aqueous solutions of 25 wt% AMP previously reported by Mehdizadeh et al (2013) was determined using reaction calorimetry, and the values reported correspond to the differential heat of absorption, as defined in this work. Gabrielsen et al (2006) reported a correlation for calculating the heat of absorption for aqueous AMP solutions, as a function of temperature and CO 2 loading that was derived from solubility data using the Gibbs-Helmholtz equation.…”

“…The data from this work are the differential heat of absorption at 50 • C. The solid line is calculated using the correlation between the heat of absorption and CO2 loading, in a solution of AMP in EG at 50 • C, reported by Zheng et al (2013). The data for CO2 absorption in aqueous solutions of 15 and 30 wt% AMP at 49.35 • C are from Arcis et al (2008), and the data for CO2 absorption in 25 wt% AMP at 40 • C are from Mehdizadeh et al (2013). The dashed line is calculated using the correlation between the heat of absorption and CO2 loading, in aqueous solutions of AMP at 50 • C, reported by Gabrielsen et al (2006).…”

Carbon dioxide capture characteristics from flue gas using aqueous 2-amino-2-methyl-1-propanol (AMP) and monoethanolamine (MEA) solutions in packed bed absorption and regeneration columns

“…This is in contradiction to earlier observation where most of the authors predicted very unstable carbamate due to steric hindrance effect of AMP. Mehdizadeh et al (2013) worked on AMP-CO 2 -water thermodynamics and calculated the AMP carbamate formation constant using computational chemistry and a model based on the extended UNIQUAC framework. They prevailed that the prepared model can represent different properties like binary and ternary VLE and composition over a wide range of temperatures, concentrations and loadings.…”