Modeling of carbon dioxide absorption by aqueous ammonia solutions using the extended UNIQUAC model / Victor Darde in Industrial & engineering chemistry research, Vol. 49 N° 24 (Décembre 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 24 (Décembre 2010) . - pp. 12663-12674 Titre : Modeling of carbon dioxide absorption by aqueous ammonia solutions using the extended UNIQUAC model Type de document : texte imprimé Auteurs : Victor Darde, Auteur ; Willy J. M. Van Well, Auteur ; Erling H. Stenby, Auteur Année de publication : 2011 Article en page(s) : pp. 12663-12674 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Gas absorption Carbon dioxide Modeling Résumé : An upgraded version of the extended UNIQUAC thermodynamic model for the carbon dioxide-ammonia-water system has been developed, on the basis of the original version proposed by Thomsen and Rasmussen (Chem. Eng. Sci. 1999, 54, 1787). The original model was valid in the temperature range 0-110 °C, the pressure range 0-10 MPa, and the concentration range up to 80 m ammonia. In this work, the validity of this model was extended up to 150 °C and the accuracy improved by increasing the number of experimental data points from 2000 to more than 3700. These experimental data consisting of vapor-liquid equilibrium data in various concentration ranges, enthalpy change from partial evaporation measurements, speciation data, heat capacity, enthalpy of solution, and enthalpy of dilution data have been used to refit 43 model parameters and standard-state properties. Henry's law constant correlations have been used for extrapolating standard-state properties of carbon dioxide and ammonia to supercritical conditions. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23692023 [article] Modeling of carbon dioxide absorption by aqueous ammonia solutions using the extended UNIQUAC model [texte imprimé] / Victor Darde, Auteur ; Willy J. M. Van Well, Auteur ; Erling H. Stenby, Auteur . - 2011 . - pp. 12663-12674. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 24 (Décembre 2010) . - pp. 12663-12674 Mots-clés : Gas absorption Carbon dioxide Modeling Résumé : An upgraded version of the extended UNIQUAC thermodynamic model for the carbon dioxide-ammonia-water system has been developed, on the basis of the original version proposed by Thomsen and Rasmussen (Chem. Eng. Sci. 1999, 54, 1787). The original model was valid in the temperature range 0-110 °C, the pressure range 0-10 MPa, and the concentration range up to 80 m ammonia. In this work, the validity of this model was extended up to 150 °C and the accuracy improved by increasing the number of experimental data points from 2000 to more than 3700. These experimental data consisting of vapor-liquid equilibrium data in various concentration ranges, enthalpy change from partial evaporation measurements, speciation data, heat capacity, enthalpy of solution, and enthalpy of dilution data have been used to refit 43 model parameters and standard-state properties. Henry's law constant correlations have been used for extrapolating standard-state properties of carbon dioxide and ammonia to supercritical conditions. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23692023

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Modeling of the mixed solvent electrolyte system CO2−Na2CO3−NaHCO3−monoethylene glycol−water / Philip L. Fosbøl in Industrial & engineering chemistry research, Vol. 48 N° 9 (Mai 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N° 9 (Mai 2009) . - pp. 4565–4578 Titre : Modeling of the mixed solvent electrolyte system CO2−Na2CO3−NaHCO3−monoethylene glycol−water Type de document : texte imprimé Auteurs : Philip L. Fosbøl, Auteur ; Kaj Thomsen, Auteur ; Erling H. Stenby, Auteur Année de publication : 2009 Article en page(s) : pp. 4565–4578 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Electrolyte system Solid−  liquid equilibrium Vapor−  liquid CO2−  NaHCO3−  Na2CO3−  monoethylene glycol−  H2O electrolyte Résumé : The extended UNIQUAC electrolyte activity coefficient model has been correlated to 751 experimental solid−liquid equilibrium (SLE), vapor−liquid equilibrium (VLE), and excess enthalpy data for the mixed solvent CO2−NaHCO3−Na2CO3−monoethylene glycol(MEG)−H2O electrolyte system. The model was validated by predicting the excess heat capacity. The model is consistent, and one set of binary interaction parameters are used for calculating all the properties between −50 and 90 °C. The model is compared to experimental data of infinite dilution activity coefficient measurements of MEG and may be used for calculating activities, solubility, salt hydrate properties, pH, and CO2 solubility in the NaHCO3−Na2CO3−MEG−H2O system. A simple density model of NaHCO3−Na2CO3−NaCl−MEG−water is given. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801168e [article] Modeling of the mixed solvent electrolyte system CO2−Na2CO3−NaHCO3−monoethylene glycol−water [texte imprimé] / Philip L. Fosbøl, Auteur ; Kaj Thomsen, Auteur ; Erling H. Stenby, Auteur . - 2009 . - pp. 4565–4578. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 9 (Mai 2009) . - pp. 4565–4578 Mots-clés : Electrolyte system Solid−  liquid equilibrium Vapor−  liquid CO2−  NaHCO3−  Na2CO3−  monoethylene glycol−  H2O electrolyte Résumé : The extended UNIQUAC electrolyte activity coefficient model has been correlated to 751 experimental solid−liquid equilibrium (SLE), vapor−liquid equilibrium (VLE), and excess enthalpy data for the mixed solvent CO2−NaHCO3−Na2CO3−monoethylene glycol(MEG)−H2O electrolyte system. The model was validated by predicting the excess heat capacity. The model is consistent, and one set of binary interaction parameters are used for calculating all the properties between −50 and 90 °C. The model is compared to experimental data of infinite dilution activity coefficient measurements of MEG and may be used for calculating activities, solubility, salt hydrate properties, pH, and CO2 solubility in the NaHCO3−Na2CO3−MEG−H2O system. A simple density model of NaHCO3−Na2CO3−NaCl−MEG−water is given. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801168e

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Solubility measurements in the mixed solvent electrolyte system Na2CO3-NaHCO3-monoethylene glycol-water / Philip L. Fosbøl in Industrial & engineering chemistry research, Vol. 48 N°4 (Février 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - p. 2218–2228 Titre : Solubility measurements in the mixed solvent electrolyte system Na2CO3-NaHCO3-monoethylene glycol-water Type de document : texte imprimé Auteurs : Philip L. Fosbøl, Auteur ; Kaj Thomsen, Auteur ; Erling H. Stenby, Auteur Année de publication : 2009 Article en page(s) : p. 2218–2228 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Electrolyte system Atmospheric pressure Schreinemakers method Résumé : 212 new data points for solubility and density have been measured in the mixed solvent electrolytic CO2−NaHCO3−Na2CO3−monoethylene glycol (MEG)−water system. Measurements were conducted at 2−60 °C at atmospheric pressure. An overview of methods available for determining the carbon dioxide and sodium content is given and the reverse Schreinemakers method was chosen. The method gives the amounts of all the species in the liquid. The solutions have a tendency to form metastable mixtures from which sodium carbonate salt hydrates may precipitate. Thirty metastable data points are reported. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8011648 [article] Solubility measurements in the mixed solvent electrolyte system Na2CO3-NaHCO3-monoethylene glycol-water [texte imprimé] / Philip L. Fosbøl, Auteur ; Kaj Thomsen, Auteur ; Erling H. Stenby, Auteur . - 2009 . - p. 2218–2228. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°4 (Février 2009) . - p. 2218–2228 Mots-clés : Electrolyte system Atmospheric pressure Schreinemakers method Résumé : 212 new data points for solubility and density have been measured in the mixed solvent electrolytic CO2−NaHCO3−Na2CO3−monoethylene glycol (MEG)−water system. Measurements were conducted at 2−60 °C at atmospheric pressure. An overview of methods available for determining the carbon dioxide and sodium content is given and the reverse Schreinemakers method was chosen. The method gives the amounts of all the species in the liquid. The solutions have a tendency to form metastable mixtures from which sodium carbonate salt hydrates may precipitate. Thirty metastable data points are reported. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8011648

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