@article{scholars6897, year = {2016}, journal = {Journal of Natural Gas Science and Engineering}, publisher = {Elsevier B.V.}, pages = {864--872}, note = {cited By 36}, volume = {34}, doi = {10.1016/j.jngse.2016.07.047}, title = {VLE of CO2 in aqueous potassium salt of L-phenylalanine: Experimental data and modeling using modified Kent-Eisenberg model}, keywords = {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}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84979753689&doi=10.1016\%2fj.jngse.2016.07.047&partnerID=40&md5=9319292f17930a96b9c04044bb3506cf}, abstract = {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{\^A} K over a CO2 pressure range of 200{\^a}??2500{\^A} 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. {\^A}{\copyright} 2016 Elsevier B.V.}, issn = {18755100}, author = {Garg, S. and Shariff, A. M. and Shaikh, M. S. and Lal, B. and Aftab, A. and Faiqa, N.} }