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Modeling of vapor - liquid equilibria for CO2 + 1 - alkanol binary systems with the PC - SAFT equation of state using polar contributions / Luis A. Roman-Ramirez in Industrial & engineering chemistry research, Vol. 49 N° 23 (Décembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 23 (Décembre 2010) . - pp. 12276-12283 Titre : Modeling of vapor - liquid equilibria for CO2 + 1 - alkanol binary systems with the PC - SAFT equation of state using polar contributions Type de document : texte imprimé Auteurs : Luis A. Roman-Ramirez, Auteur ; Fernando Garcia-Sanchez, Auteur ; Ciro H. Ortiz-Estrada, Auteur Année de publication : 2011 Article en page(s) : pp. 12276-12283 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Thermodynamic  properties  Equations  of  state  Binary  system  Carbon  dioxide  Phase  equilibrium  Liquid  vapor  equilibrium  Modeling Résumé : In this work, we present the modeling of the vapor—liquid equilibria for the binary systems CO2 + 1-alkanol (from methanol to 1-nonanol) using the PC-SAFT equation of state as the thermodynamic model for the liquid and vapor phases. Four different versions of the PC-SAFT model were compared: the quadrupolar version for the CO2 moleculc, the dipolar version for alkanols, a dipolar + quadrupolar version for CO2 and alkanols without considering cross-interactions, and the original version of the PC-SAFT equation. For the modeling of these systems, binary interaction parameters were fitted to experimental binary vapor-liquid equilibrium data of the form kij = k0ij + k1ij/T. The results obtained showed that, for pure compounds, the inclusion of the dipolar term improved the predictions of the saturation region slightly, whereas for binary systems, the PC-SAFT model with dipolar and quadrupolar contributions yielded the best predictions of the experimental behavior, mainly because of the quadrupolar contribution for the CO2 molecule. The dipolar version of the PC-SAFT equation gave no better predictions than those obtained with the original PC-SAFT model with an association contribution. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23463392 [article] Modeling of vapor - liquid equilibria for CO2 + 1 - alkanol binary systems with the PC - SAFT equation of state using polar contributions [texte imprimé] / Luis A. Roman-Ramirez, Auteur ; Fernando Garcia-Sanchez, Auteur ; Ciro H. Ortiz-Estrada, Auteur . - 2011 . - pp. 12276-12283. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 23 (Décembre 2010) . - pp. 12276-12283 Mots-clés : Thermodynamic  properties  Equations  of  state  Binary  system  Carbon  dioxide  Phase  equilibrium  Liquid  vapor  equilibrium  Modeling Résumé : In this work, we present the modeling of the vapor—liquid equilibria for the binary systems CO2 + 1-alkanol (from methanol to 1-nonanol) using the PC-SAFT equation of state as the thermodynamic model for the liquid and vapor phases. Four different versions of the PC-SAFT model were compared: the quadrupolar version for the CO2 moleculc, the dipolar version for alkanols, a dipolar + quadrupolar version for CO2 and alkanols without considering cross-interactions, and the original version of the PC-SAFT equation. For the modeling of these systems, binary interaction parameters were fitted to experimental binary vapor-liquid equilibrium data of the form kij = k0ij + k1ij/T. The results obtained showed that, for pure compounds, the inclusion of the dipolar term improved the predictions of the saturation region slightly, whereas for binary systems, the PC-SAFT model with dipolar and quadrupolar contributions yielded the best predictions of the experimental behavior, mainly because of the quadrupolar contribution for the CO2 molecule. The dipolar version of the PC-SAFT equation gave no better predictions than those obtained with the original PC-SAFT model with an association contribution. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23463392

VLL equilibria and critical end points calculation of nitrogen - containing LNG systems / Edgar Ramirez-Jiménez in Industrial & engineering chemistry research, Vol. 51 N° 27 (Juillet 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 27 (Juillet 2012) . - pp. 9409-9418 Titre : VLL equilibria and critical end points calculation of nitrogen - containing LNG systems : Application of SRK and PC - SAFT equations of state Type de document : texte imprimé Auteurs : Edgar Ramirez-Jiménez, Auteur ; Daimler N. Justo-Garcia, Auteur ; Fernando Garcia-Sanchez, Auteur Année de publication : 2012 Article en page(s) : pp. 9409-9418 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Thermodynamic  properties  Equations  of  state  LNG Résumé : Two different numerical techniques, applying either the SRK or the PC-SAFT equations of state, were used to predict the multiphase behavior exhibited by the ternary systems nitrogen + methane + ethane, nitrogen + methane + propane, and nitrogen + methane + n-butane. The predictions with both equations of state were compared against experimental data in terms of nitrogen mole fractions of the two liquid phases and it was demonstrated that the agreement is good. Furthermore, a procedure similar to that reported by Gregorowicz and de Loos, in conjunction with the SRK equation of state, was introduced. It was applied to predict the K (L1―L2=V) and LCST (L1=L2―V) critical end points at constant temperature for the systems studied, and demonstrated a reliable and robust performance with good convergence characteristics. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26132278 [article] VLL equilibria and critical end points calculation of nitrogen - containing LNG systems : Application of SRK and PC - SAFT equations of state [texte imprimé] / Edgar Ramirez-Jiménez, Auteur ; Daimler N. Justo-Garcia, Auteur ; Fernando Garcia-Sanchez, Auteur . - 2012 . - pp. 9409-9418. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 27 (Juillet 2012) . - pp. 9409-9418 Mots-clés : Thermodynamic  properties  Equations  of  state  LNG Résumé : Two different numerical techniques, applying either the SRK or the PC-SAFT equations of state, were used to predict the multiphase behavior exhibited by the ternary systems nitrogen + methane + ethane, nitrogen + methane + propane, and nitrogen + methane + n-butane. The predictions with both equations of state were compared against experimental data in terms of nitrogen mole fractions of the two liquid phases and it was demonstrated that the agreement is good. Furthermore, a procedure similar to that reported by Gregorowicz and de Loos, in conjunction with the SRK equation of state, was introduced. It was applied to predict the K (L1―L2=V) and LCST (L1=L2―V) critical end points at constant temperature for the systems studied, and demonstrated a reliable and robust performance with good convergence characteristics. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26132278