TY - JOUR
T1 - High-pressure experimental and theoretical study of CO2 solubility in aqueous blends of lysine salts with piperazine as new absorbents
AU - Suleman, Humbul
AU - Maulud, Abdulhalim Shah
AU - Syalsabila, Afaf
AU - Shahid, Muhammad Zubair
AU - Fosbøl, Philip Loldrup
PY - 2020/3/1
Y1 - 2020/3/1
N2 - Vapour-liquid equilibrium of carbon dioxide loaded potassium and sodium l-lysine salts have been investigated in the region of high-pressure and high loadings. The equilibrium solubility of carbon dioxide was measured in separate aqueous l-lysine alkaline salts for a range of temperature (303.15–363.15 K), solution concentrations (1.0–3.0 M) and pressure (95–4204 kPa). In addition to that, solubility of carbon dioxide in blends of both aforementioned amino acid salts with piperazine were investigated. All the studied solutions exhibited an increase in the carbon dioxide loading values with increase in the pressure and had a negative relationship with increase in the temperature and solvent concentration. Furthermore, the experimental data was correlated by the Kent-Eisenberg model. The correlated values shows a good agreement (AAD% of 5.15%) with experimental values. The regressed parameters of the model allows satisfactory estimation of the loadings of carbon dioxide in all studied solutions, for parametric studies. The study shows that l-lysine salts are potential green solvents for the carbon dioxide capture at high pressure.
AB - Vapour-liquid equilibrium of carbon dioxide loaded potassium and sodium l-lysine salts have been investigated in the region of high-pressure and high loadings. The equilibrium solubility of carbon dioxide was measured in separate aqueous l-lysine alkaline salts for a range of temperature (303.15–363.15 K), solution concentrations (1.0–3.0 M) and pressure (95–4204 kPa). In addition to that, solubility of carbon dioxide in blends of both aforementioned amino acid salts with piperazine were investigated. All the studied solutions exhibited an increase in the carbon dioxide loading values with increase in the pressure and had a negative relationship with increase in the temperature and solvent concentration. Furthermore, the experimental data was correlated by the Kent-Eisenberg model. The correlated values shows a good agreement (AAD% of 5.15%) with experimental values. The regressed parameters of the model allows satisfactory estimation of the loadings of carbon dioxide in all studied solutions, for parametric studies. The study shows that l-lysine salts are potential green solvents for the carbon dioxide capture at high pressure.
U2 - 10.1016/j.fluid.2019.112429
DO - 10.1016/j.fluid.2019.112429
M3 - Article
VL - 507
JO - Fluid Phase Equilibria
JF - Fluid Phase Equilibria
SN - 0378-3812
M1 - 112429
ER -