Documents disponibles écrits par cet auteur

Aspects to be considered for the development of a correlation algorithm for condensed phase equilibrium data of ternary systems / A. Marcilla in Industrial & engineering chemistry research, Vol. 49 N° 20 (Octobre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 20 (Octobre 2010) . - pp. 10100–10110 Titre : Aspects to be considered for the development of a correlation algorithm for condensed phase equilibrium data of ternary systems Type de document : texte imprimé Auteurs : A. Marcilla, Auteur ; M. M. Olaya, Auteur ; M. D. Serrano, Auteur Année de publication : 2011 Article en page(s) : pp. 10100–10110 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Phase  equilibrium  Ternary  systems Résumé : The existing commercial software packages for equilibrium data correlation, or analogous tools included in chemical process simulators, have been widely used and their extensive capabilities are well-known. Nevertheless, and as far as LLE calculations are concerned, they have been designed for the simplest equilibrium behavior. For example, for ternary systems, only the correlation of type 1 and type 2 LLE data is possible. None of these applications allows for the correlation of type 0 LLE, type 3 LLLE, or type 4 LLSE systems, although these are interesting for many industrial purposes. To enable a possible extension of such software, a robust computation algorithm has been developed to correlate phase equilibrium data among condensed phases for all of these more complicated behaviors. Moreover, this algorithm includes some new strategies to avoid the main problems occurring through correlation procedures, which lead to convergence problems or inconsistent results. These strategies are explained in detail in the present work. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1010383 [article] Aspects to be considered for the development of a correlation algorithm for condensed phase equilibrium data of ternary systems [texte imprimé] / A. Marcilla, Auteur ; M. M. Olaya, Auteur ; M. D. Serrano, Auteur . - 2011 . - pp. 10100–10110. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 20 (Octobre 2010) . - pp. 10100–10110 Mots-clés : Phase  equilibrium  Ternary  systems Résumé : The existing commercial software packages for equilibrium data correlation, or analogous tools included in chemical process simulators, have been widely used and their extensive capabilities are well-known. Nevertheless, and as far as LLE calculations are concerned, they have been designed for the simplest equilibrium behavior. For example, for ternary systems, only the correlation of type 1 and type 2 LLE data is possible. None of these applications allows for the correlation of type 0 LLE, type 3 LLLE, or type 4 LLSE systems, although these are interesting for many industrial purposes. To enable a possible extension of such software, a robust computation algorithm has been developed to correlate phase equilibrium data among condensed phases for all of these more complicated behaviors. Moreover, this algorithm includes some new strategies to avoid the main problems occurring through correlation procedures, which lead to convergence problems or inconsistent results. These strategies are explained in detail in the present work. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1010383

Checking liquid - liquid plait point conditions and their application in ternary systems / A. Marcilla 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. 5098-5102 Titre : Checking liquid - liquid plait point conditions and their application in ternary systems Type de document : texte imprimé Auteurs : A. Marcilla, Auteur ; M.D. Serrano, Auteur ; Juan A. Reyes-Labarta, Auteur Année de publication : 2012 Article en page(s) : pp. 5098-5102 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Ternary  system  Surveillance Résumé : This work reviews the thermodynamic criteria for incipient immiscibility at the plait point in ternary systems, and also shows its application to singular LL equilibria, such as different type 3 ternary systems (Treybal classification), where an inadequate use of the criteria could yield to ambiguities. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25777950 [article] Checking liquid - liquid plait point conditions and their application in ternary systems [texte imprimé] / A. Marcilla, Auteur ; M.D. Serrano, Auteur ; Juan A. Reyes-Labarta, Auteur . - 2012 . - pp. 5098-5102. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 13 (Avril 2012) . - pp. 5098-5102 Mots-clés : Ternary  system  Surveillance Résumé : This work reviews the thermodynamic criteria for incipient immiscibility at the plait point in ternary systems, and also shows its application to singular LL equilibria, such as different type 3 ternary systems (Treybal classification), where an inadequate use of the criteria could yield to ambiguities. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25777950

Evolution with the temperature of the compounds obtained in the catalytic pyrolysis of polyethylene over HUSY / A. Marcilla in Industrial & engineering chemistry research, Vol. 47 N°18 (Septembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N°18 (Septembre 2008) . - p. 6896–6903 Titre : Evolution with the temperature of the compounds obtained in the catalytic pyrolysis of polyethylene over HUSY Type de document : texte imprimé Auteurs : A. Marcilla, Auteur ; M. I. Beltrán, Auteur ; R. Navarro, Auteur Année de publication : 2008 Article en page(s) : p. 6896–6903 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Low-density  polyethylene  High-density  polyethylene  HUSY  zeolite  Catalytic  decomposition Résumé : The catalytic decomposition processes of low- and high-density polyethylene (LDPE and HDPE) have been studied using HUSY zeolite as catalyst in a batch reactor under dynamic conditions. The evolution of the gaseous and condensed products evolved with respect to the temperature has been analyzed and compared to that obtained under similar conditions in the thermal pyrolysis of LDPE and HDPE. The behavior of the gases generated from both polyethylenes was similar, olefins being the more abundant species. Great changes were observed in the composition of the gases evolved at different temperatures. Isoparaffins and olefins showed two maxima at low and high temperatures, whereas the remaining compounds generated presented only one maximum at high temperatures. Analysis of condensed products revealed some differences between the two polyethylenes at the end of the process. Two maxima, one at low and another at high temperatures, appeared in the catalytic pyrolysis of HDPE, where isoparaffins and aromatics were the most abundant condensed products obtained at each maximum. However in the case of LDPE, n-paraffins were the main products at the very end of the process. These different outcomes could be related to the progressive deactivation of the zeolite. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800520u [article] Evolution with the temperature of the compounds obtained in the catalytic pyrolysis of polyethylene over HUSY [texte imprimé] / A. Marcilla, Auteur ; M. I. Beltrán, Auteur ; R. Navarro, Auteur . - 2008 . - p. 6896–6903. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°18 (Septembre 2008) . - p. 6896–6903 Mots-clés : Low-density  polyethylene  High-density  polyethylene  HUSY  zeolite  Catalytic  decomposition Résumé : The catalytic decomposition processes of low- and high-density polyethylene (LDPE and HDPE) have been studied using HUSY zeolite as catalyst in a batch reactor under dynamic conditions. The evolution of the gaseous and condensed products evolved with respect to the temperature has been analyzed and compared to that obtained under similar conditions in the thermal pyrolysis of LDPE and HDPE. The behavior of the gases generated from both polyethylenes was similar, olefins being the more abundant species. Great changes were observed in the composition of the gases evolved at different temperatures. Isoparaffins and olefins showed two maxima at low and high temperatures, whereas the remaining compounds generated presented only one maximum at high temperatures. Analysis of condensed products revealed some differences between the two polyethylenes at the end of the process. Two maxima, one at low and another at high temperatures, appeared in the catalytic pyrolysis of HDPE, where isoparaffins and aromatics were the most abundant condensed products obtained at each maximum. However in the case of LDPE, n-paraffins were the main products at the very end of the process. These different outcomes could be related to the progressive deactivation of the zeolite. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800520u

Kinetic study of the thermal processing and pyrolysis of crosslinked ethylene vinyl acetate—polyethylene mixtures / Juan A. Reyes-Labarta in Industrial & engineering chemistry research, Vol. 50 N° 13 (Juillet 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 7964-7976 Titre : Kinetic study of the thermal processing and pyrolysis of crosslinked ethylene vinyl acetate—polyethylene mixtures Type de document : texte imprimé Auteurs : Juan A. Reyes-Labarta, Auteur ; J. Sempere, Auteur ; A. Marcilla, Auteur Année de publication : 2011 Article en page(s) : pp. 7964-7976 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Pyrolysis  Kinetics Résumé : The different transitions involved in the thermal processing and decomposition of cross-linked ethylene vinyl acetate-polyethylene (EVA-PE) mixtures, with different concentrations of PE and peroximon (cross-linking agent), have been analyzed and simultaneously modeled by the application of a mechanistic pseudokinetic model. The model suggested involves all of the fractions susceptible of undergoing transitions or reactions studied by differential scanning calorimetry and thermogravimetric analysis, including complex and overlapped peaks. The model applied is capable of accurately representing the different processes involved and can be of great interest in the understanding and quantification of such phenomena, including the modeling of heat effects involved in the whole processing or pyrolysis of this type of product. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24332120 [article] Kinetic study of the thermal processing and pyrolysis of crosslinked ethylene vinyl acetate—polyethylene mixtures [texte imprimé] / Juan A. Reyes-Labarta, Auteur ; J. Sempere, Auteur ; A. Marcilla, Auteur . - 2011 . - pp. 7964-7976. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 7964-7976 Mots-clés : Pyrolysis  Kinetics Résumé : The different transitions involved in the thermal processing and decomposition of cross-linked ethylene vinyl acetate-polyethylene (EVA-PE) mixtures, with different concentrations of PE and peroximon (cross-linking agent), have been analyzed and simultaneously modeled by the application of a mechanistic pseudokinetic model. The model suggested involves all of the fractions susceptible of undergoing transitions or reactions studied by differential scanning calorimetry and thermogravimetric analysis, including complex and overlapped peaks. The model applied is capable of accurately representing the different processes involved and can be of great interest in the understanding and quantification of such phenomena, including the modeling of heat effects involved in the whole processing or pyrolysis of this type of product. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24332120

Liquid — vapor equilibrium data correlation / A. Marcilla in Industrial & engineering chemistry research, Vol. 50 N° 7 (Avril 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 7 (Avril 2011) . - pp. 4077-4085 Titre : Liquid — vapor equilibrium data correlation : part I. pitfalls and some ideas to overcome them Type de document : texte imprimé Auteurs : A. Marcilla, Auteur ; M. M. Olaya, Auteur ; M. D. Serrano, Auteur Année de publication : 2011 Article en page(s) : pp. 4077-4085 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Correlation  analysis  Correlation  Phase  equilibrium  Liquid  vapor  equilibrium Résumé : Accurate description of VLE (and VLLE) plays an essential role in many industrial separation processes. Local composition models for the activity coefficient description, such as NRTL and UNIQUAC, have contributed significantly over the past four decades toward the fitting of experimental VLE data, for example, to the design of distillation towers. However, a critical examination of this field reveals that important deficiencies still exist due to the complex nature of the topic. In the present paper, these pitfalls are classified and discussed in detail, and some examples are selected to conveniently illustrate every one of them. We also comment on some aspects that could improve the distribution, evaluation and correlation of these VLE (and VLLE) data that, in turn, could lead to better results and avoid misinterpretations. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24027655 [article] Liquid — vapor equilibrium data correlation : part I. pitfalls and some ideas to overcome them [texte imprimé] / A. Marcilla, Auteur ; M. M. Olaya, Auteur ; M. D. Serrano, Auteur . - 2011 . - pp. 4077-4085. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 7 (Avril 2011) . - pp. 4077-4085 Mots-clés : Correlation  analysis  Correlation  Phase  equilibrium  Liquid  vapor  equilibrium Résumé : Accurate description of VLE (and VLLE) plays an essential role in many industrial separation processes. Local composition models for the activity coefficient description, such as NRTL and UNIQUAC, have contributed significantly over the past four decades toward the fitting of experimental VLE data, for example, to the design of distillation towers. However, a critical examination of this field reveals that important deficiencies still exist due to the complex nature of the topic. In the present paper, these pitfalls are classified and discussed in detail, and some examples are selected to conveniently illustrate every one of them. We also comment on some aspects that could improve the distribution, evaluation and correlation of these VLE (and VLLE) data that, in turn, could lead to better results and avoid misinterpretations. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24027655

Thermal treatment and degradation of cross - linked ethylene vinyl acetate – polyethylene – azodicarbonamide – ZnO foams. complete kinetic modeling and analysis / Juan A. Reyes-Labarta in Industrial & engineering chemistry research, Vol. 51 N° 28 (Juillet 2012) 

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