%P 864-872
%A S. Garg
%A A.M. Shariff
%A M.S. Shaikh
%A B. Lal
%A A. Aftab
%A N. Faiqa
%I Elsevier B.V.
%V 34
%T VLE of CO2 in aqueous potassium salt of L-phenylalanine: Experimental data and modeling using modified Kent-Eisenberg model
%R 10.1016/j.jngse.2016.07.047
%D 2016
%L scholars6897
%J Journal of Natural Gas Science and Engineering
%O cited By 36
%K Amino acids; Atmospheric composition; Carbon dioxide; Equilibrium constants; Phase equilibria; Salts; Solubility; Solutions, Average absolute deviation; Effect of temperature; Kent-Eisenberg; l-Phenylalanine; Potassium salts; Prediction capability; Solubility of CO; Thermodynamic model, Loading
%X In this study, vapor-liquid equilibrium (VLE) of CO2 in aqueous potassium salt of l-phenylalanine (K-Phe) was investigated. A high pressure solubility cell was used to measure the solubility of CO2 in aqueous solution of (10, 20 and 25) wt K-Phe at 303.15, 313.15 and 333.15 K over a CO2 pressure range of 200�2500 kPa. Equilibrium CO2 solubility was defined in terms of CO2 loading (mole CO2/mole of amine). The effect of temperature, concentration and equilibrium CO2 pressure on CO2 loading was discussed. Experimental CO2 loading data in aqueous K-Phe solutions show that the solvent has good potential for CO2 capture systems. Also, a modified Kent-Eisenberg model was used to correlate the experimental CO2 solubility data and carbamate hydrolysis and amine deprotonation equilibrium constants were regressed as a function of temperature, concentration and equilibrium CO2 pressure. An average absolute deviation of 7.70 between experimental and predicted data indicated the good prediction capability of the applied thermodynamic model. © 2016 Elsevier B.V.