Documents disponibles écrits par cet auteur

A new algorithm for the determination of product sequences in azeotropic batch distillation / Laszlo Hegely in Industrial & engineering chemistry research, Vol. 50 N° 22 (Novembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 22 (Novembre 2011) . - pp. 12757-12766 Titre : A new algorithm for the determination of product sequences in azeotropic batch distillation Type de document : texte imprimé Auteurs : Laszlo Hegely, Auteur ; Peter Lang, Auteur Année de publication : 2012 Article en page(s) : pp. 12757-12766 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Distillation  Batchwise  Azeotropic  mixture  Algorithm Résumé : In multicomponent azeotropic mixtures (e.g., waste solvents), the products obtainable by batch distillation and their maximal amount is highly dependent on the charge composition. A method is presented for the determination of product sequences for any number of components based only on the temperatures of pure components and azeotropes, and azeotropic compositions, without the knowledge of further VLE data. The method is suitable for heteroazeotropes and for taking pressure change into consideration, as well. The stability of fixed points is determined with the assumption that Serafimov topological class of the mixture occurs in Reshetov's statistics. On the basis of the stabilities, we enumerate all feasible product sequences using the algorithm of [Ahmad, B. S.; Zhang, Y.; Barton, P. 1. Product Sequences in Azeotropic Batch Distillation. AlChE Journal 1998, 44, 5, 1051-1070.]. Finally, the relative amount of cuts are determined assuming maximal separation for the given charge composition. The results are presented for the systems acetone-chloroform-methanol-ethanol-benzene and methanol-tetrahydrofuran-ethyl acetate—ethanol—isopropyl alcohol-water. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24745750 [article] A new algorithm for the determination of product sequences in azeotropic batch distillation [texte imprimé] / Laszlo Hegely, Auteur ; Peter Lang, Auteur . - 2012 . - pp. 12757-12766. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 22 (Novembre 2011) . - pp. 12757-12766 Mots-clés : Distillation  Batchwise  Azeotropic  mixture  Algorithm Résumé : In multicomponent azeotropic mixtures (e.g., waste solvents), the products obtainable by batch distillation and their maximal amount is highly dependent on the charge composition. A method is presented for the determination of product sequences for any number of components based only on the temperatures of pure components and azeotropes, and azeotropic compositions, without the knowledge of further VLE data. The method is suitable for heteroazeotropes and for taking pressure change into consideration, as well. The stability of fixed points is determined with the assumption that Serafimov topological class of the mixture occurs in Reshetov's statistics. On the basis of the stabilities, we enumerate all feasible product sequences using the algorithm of [Ahmad, B. S.; Zhang, Y.; Barton, P. 1. Product Sequences in Azeotropic Batch Distillation. AlChE Journal 1998, 44, 5, 1051-1070.]. Finally, the relative amount of cuts are determined assuming maximal separation for the given charge composition. The results are presented for the systems acetone-chloroform-methanol-ethanol-benzene and methanol-tetrahydrofuran-ethyl acetate—ethanol—isopropyl alcohol-water. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24745750

Separation of an acetone−methanol mixture by pressure-swing batch distillation in a double-column system with and without thermal integration / Gabor Modla in Industrial & engineering chemistry research, Vol. 49 N° 8 (Avril 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 8 (Avril 2010) . - pp. 3785–3793 Titre : Separation of an acetone−methanol mixture by pressure-swing batch distillation in a double-column system with and without thermal integration Type de document : texte imprimé Auteurs : Gabor Modla, Auteur ; Peter Lang, Auteur Année de publication : 2010 Article en page(s) : pp. 3785–3793 Langues : Anglais (eng) Mots-clés : Acetone−Methanol  Mixture  Batch  Distillation  Thermal  Integration Résumé : Pressure-swing batch distillation in a double-column system is suggested for the separation of an acetone−methanol pressure-sensitive azeotropic mixture. The studied column configuration is the double-column batch stripper in open mode. We investigated this separation by rigorous simulation using a professional dynamic flow-sheet simulator. The influence of the most important operational parameters is studied. The energy demand of the separation is converted to carbon dioxide emission. The two columns can be thermally integrated to save energy. The effectiveness of thermal coupling is also investigated at different pressure gaps. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9019352 [article] Separation of an acetone−methanol mixture by pressure-swing batch distillation in a double-column system with and without thermal integration [texte imprimé] / Gabor Modla, Auteur ; Peter Lang, Auteur . - 2010 . - pp. 3785–3793. Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 8 (Avril 2010) . - pp. 3785–3793 Mots-clés : Acetone−Methanol  Mixture  Batch  Distillation  Thermal  Integration Résumé : Pressure-swing batch distillation in a double-column system is suggested for the separation of an acetone−methanol pressure-sensitive azeotropic mixture. The studied column configuration is the double-column batch stripper in open mode. We investigated this separation by rigorous simulation using a professional dynamic flow-sheet simulator. The influence of the most important operational parameters is studied. The energy demand of the separation is converted to carbon dioxide emission. The two columns can be thermally integrated to save energy. The effectiveness of thermal coupling is also investigated at different pressure gaps. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9019352