Solubility of carbon dioxide in a mixture of polyethylene glycol dimethyl ethers (Genosorb 1753) was determined at 298.15, 313.15, 323.15 and 333.15 K at pressures up to 7940 kPa. The obtained solubility data are compared with those of CO2 in other physical solvents. The results were correlated with the Peng–Robinson (Peng and Robinson, Ind. Eng. Chem. Fundam. 15, 59–64 1976) equation of state, and the interaction parameters are reported. Data at 323.15 K were predicted. Henry's Law constants were obtained from the data and the excess properties (excess Gibbs free energy, excess entropy and excess enthalpy) of the liquid mixture over the full range of composition were predicted at each temperature using the NRTL activity coefficient model. Enthalpy of solution and the enthalpy of mixing were determined at infinite dilution. In addition, the heats of absorption were determined using Clausius–Clapeyron equation.



La solubilite du dioxyde de carbone (CO2) dans un melange de polyethylene glycol dimethyl ethers (Genosorb 1753) a ete determinee a 298.15, 313.15, 323.15 et 333.15 K a des pressions allant jusqu'a 7940 kPa. Les donnees de solubilite obtenues sont comparees avec celles de CO2 dans d'autres solvants physiques. Les resultats ont ete correles avec l'equation d'etat de Peng–Robinson (Peng and Robinson, Ind. Eng. Chem. Fundam. 15, 59–64 1976) et les parametres d'interaction sont presentes. La solubilite a 323.15 K a ete predite. Les constantes de la loi d'Henry ont ete obtenues a partir des donnees. Les proprietes en exces (l'energie libre de Gibbs d'exces, l'entropie et l'enthalpie d'exces) du melange liquide sur toute la gamme de composition a ont ete predites a chaque temperature en utilisant le modele NRTL. L'enthalpie de solution et l'enthalpie de melange ont ete determinees dilution infinie. Finalement, les chaleurs d'absorption ont ete determinees en utilisant l'equation de Clausius–Clapeyron. © 2011 Canadian Society for Chemical Engineering

High pressure physical solubility of carbon dioxide (CO2) in mixed polyethylene glycol dimethyl ethers (Genosorb 1753)

Excess enthalpies between 293 and 323 K for constituent binaries of ternary mixtures exhibiting partial miscibility

The excess enthalpies of 10 (n-pentane + an n-alkanol) mixtures at 298.15 K

The NRTL model has been used to correlate the data for the aqueous alkanolamine systems of (MEA+H2O), (DEA+H2O) and (MDEA+H2O). The model was successfully applied to correlate simultaneously the excess enthalpy, vapour-liquid equilibria, and low temperature activity coefficients. A large database of data was collected for the investigation and it covers a wide range of composition, temperature and pressures. It was found that the form of the binary interaction parameters used by Posey (1996) with a variable non-randomness parameter gave the best results.

http://www.nt.ntnu.no/users/haugwarb/KP8108/Essays/kurt_schmidt.pdf

Romeo L. Tan

Papers

Limits on the simultaneous correlation of gE and hE data by the NRTL, LEMF and Wilson's equations

The prediction of isobaric phase equilibria for non-ideal multicomponent mixtures from heat of mixing data☆

The prediction of isothermal phase equilibria for non-ideal multicomponent mixtures from heats of mixing☆

The prediction of high temperature vapor—liquid equilbiria from lower temperature heat of mixing data