Documents disponibles écrits par cet auteur

Molecular thermodynamic modeling of mixed solvent solubility / Martin D. Ellegaard in Industrial & engineering chemistry research, Vol. 49 N° 22 (Novembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 22 (Novembre 2010) . - pp. 11620-11632 Titre : Molecular thermodynamic modeling of mixed solvent solubility Type de document : texte imprimé Auteurs : Martin D. Ellegaard, Auteur ; Jens Abildskov, Auteur ; John P. O’Connell, Auteur Année de publication : 2011 Article en page(s) : pp. 11620-11632 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Solubility  Mixed  solvent  Modeling Résumé : A method based on statistical mechanical fluctuation solution theory for composition derivatives of activity coefficients is employed for estimating dilute solubilities of 11 solid pharmaceutical solutes in nearly 70 mixed aqueous and nonaqueous solvent systems. The solvent mixtures range from nearly ideal to strongly nonideal. The database covers a temperature range from 293 to 323 K. Comparisons with available data and other existing solubility methods show that the method successfully describes a variety of observed mixed solvent solubility behaviors using solute-solvent parameters from global regression of ternary data as well as predictions based on pure solvent solubilities with an average error of about 10% on mole fractions. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23437861 [article] Molecular thermodynamic modeling of mixed solvent solubility [texte imprimé] / Martin D. Ellegaard, Auteur ; Jens Abildskov, Auteur ; John P. O’Connell, Auteur . - 2011 . - pp. 11620-11632. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 22 (Novembre 2010) . - pp. 11620-11632 Mots-clés : Solubility  Mixed  solvent  Modeling Résumé : A method based on statistical mechanical fluctuation solution theory for composition derivatives of activity coefficients is employed for estimating dilute solubilities of 11 solid pharmaceutical solutes in nearly 70 mixed aqueous and nonaqueous solvent systems. The solvent mixtures range from nearly ideal to strongly nonideal. The database covers a temperature range from 293 to 323 K. Comparisons with available data and other existing solubility methods show that the method successfully describes a variety of observed mixed solvent solubility behaviors using solute-solvent parameters from global regression of ternary data as well as predictions based on pure solvent solubilities with an average error of about 10% on mole fractions. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23437861

The gibbs – helmholtz equation and the thermodynamic consistency of chemical absorption data / Paul M. Mathias in Industrial & engineering chemistry research, Vol. 51 N° 13 (Avril 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 13 (Avril 2012) . - pp. 5090–5097 Titre : The gibbs – helmholtz equation and the thermodynamic consistency of chemical absorption data Type de document : texte imprimé Auteurs : Paul M. Mathias, Auteur ; John P. O’Connell, Auteur Année de publication : 2012 Article en page(s) : pp. 5090–5097 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Thermodynamic  Chemical  absorption Résumé : The Gibbs–Helmholtz (G-H) equation connects vapor–liquid equilibrium (VLE) and calorimetric data. If experimental measurements for the heat of solution are not available, they may be estimated through the G-H equation. Further, if both VLE and heat-of-solution data are available, their mutual thermodynamic consistency can be evaluated through the G-H equation, to develop the most accurate and reliable model. This kind of analysis is particularly useful for chemical-absorption systems, such as the capture of CO2 using aqueous solutions of amines, where regeneration energies are significant. In this work, the G-H equation is derived to unambiguously relate the commonly used form to the rigorous and general form, including for systems where phase equilibrium is accompanied by chemical reactions in any phase. The effect of approximations and the range of applicability of the common G-H equation are first applied to data generated for a simple VLE system by an equation of state, with different reliability found for the vapor and liquid phases. Next, consistency is evaluated for many VLE and calorimetric data for CO2 absorption in aqueous MEA (monoethanolamine). It is shown that some VLE and/or calorimetric data sets are likely to be in error and that the experimental VLE and CO2 heat of solution at the highest temperatures are currently uncertain. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202668k [article] The gibbs – helmholtz equation and the thermodynamic consistency of chemical absorption data [texte imprimé] / Paul M. Mathias, Auteur ; John P. O’Connell, Auteur . - 2012 . - pp. 5090–5097. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 13 (Avril 2012) . - pp. 5090–5097 Mots-clés : Thermodynamic  Chemical  absorption Résumé : The Gibbs–Helmholtz (G-H) equation connects vapor–liquid equilibrium (VLE) and calorimetric data. If experimental measurements for the heat of solution are not available, they may be estimated through the G-H equation. Further, if both VLE and heat-of-solution data are available, their mutual thermodynamic consistency can be evaluated through the G-H equation, to develop the most accurate and reliable model. This kind of analysis is particularly useful for chemical-absorption systems, such as the capture of CO2 using aqueous solutions of amines, where regeneration energies are significant. In this work, the G-H equation is derived to unambiguously relate the commonly used form to the rigorous and general form, including for systems where phase equilibrium is accompanied by chemical reactions in any phase. The effect of approximations and the range of applicability of the common G-H equation are first applied to data generated for a simple VLE system by an equation of state, with different reliability found for the vapor and liquid phases. Next, consistency is evaluated for many VLE and calorimetric data for CO2 absorption in aqueous MEA (monoethanolamine). It is shown that some VLE and/or calorimetric data sets are likely to be in error and that the experimental VLE and CO2 heat of solution at the highest temperatures are currently uncertain. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202668k

Thermodynamic property modeling for chemical process and product engineering / John P. O’Connell in Industrial & engineering chemistry research, Vol. 48 N° 10 (Mai 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 10 (Mai 2009) . - pp. 4619–4637 Titre : Thermodynamic property modeling for chemical process and product engineering : some perspectives Type de document : texte imprimé Auteurs : John P. O’Connell, Auteur ; Rafiqul Gani, Auteur ; Paul M. Mathias, Auteur Année de publication : 2009 Article en page(s) : pp. 4619–4637 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Thermodynamics  Chemical  products Résumé : Thermodynamic properties have always played essential roles in the engineering of chemical products and in the processes that manufacture them. Further, contemporary and future chemical technologies depend more than ever on property model formulation and application. This work explores how properties are utilized in process and product engineering, including opportunities and constraints of current property models, the current status of data availability and needs, and the interplay of data and models. Several case studies are given to illustrate underlying concepts, strategies for development, and methods of application to some industrial systems. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801535a [article] Thermodynamic property modeling for chemical process and product engineering : some perspectives [texte imprimé] / John P. O’Connell, Auteur ; Rafiqul Gani, Auteur ; Paul M. Mathias, Auteur . - 2009 . - pp. 4619–4637. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 10 (Mai 2009) . - pp. 4619–4637 Mots-clés : Thermodynamics  Chemical  products Résumé : Thermodynamic properties have always played essential roles in the engineering of chemical products and in the processes that manufacture them. Further, contemporary and future chemical technologies depend more than ever on property model formulation and application. This work explores how properties are utilized in process and product engineering, including opportunities and constraints of current property models, the current status of data availability and needs, and the interplay of data and models. Several case studies are given to illustrate underlying concepts, strategies for development, and methods of application to some industrial systems. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801535a