Documents disponibles écrits par cet auteur

Experimental design of topological curves to safely optimize highly exothermic complex reacting systems / Sabrina Copelli in Industrial & engineering chemistry research, Vol. 50 N° 17 (Septembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 17 (Septembre 2011) . - pp. 9910-9917 Titre : Experimental design of topological curves to safely optimize highly exothermic complex reacting systems Type de document : texte imprimé Auteurs : Sabrina Copelli, Auteur ; Marco Derudi, Auteur ; Renato Rota, Auteur Année de publication : 2011 Article en page(s) : pp. 9910-9917 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Experimental  design Résumé : Strongly exothermic solution homopolymerizations are a class of chain reactions particularly difficult to be optimized from both a safety and a productivity viewpoint. Particularly, lots of side undesired reactions (e.g., backbiting, propagation of tertiary radicals, chain transfer to monomer or solvent, etc.), which affect the selectivity with respect to the desired product, and relevant mass and heat transfer problems, due to the increasing system viscosity, take place during such syntheses. Under these unavoidable operating conditions, it is difficult to employ theoretical procedures that are able to safely optimize the analyzed process, because the development of a reliable mathematical model is often not affordable or too time-consuming. In this work, it is shown that the topological criterion theory and its related optimization procedure can be used to optimize experimentally (through a dedicated set of isoperibolic reaction calorimetry tests) a complex reacting system even if its reaction scheme and all information about the kinetics are not available. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24483634 [article] Experimental design of topological curves to safely optimize highly exothermic complex reacting systems [texte imprimé] / Sabrina Copelli, Auteur ; Marco Derudi, Auteur ; Renato Rota, Auteur . - 2011 . - pp. 9910-9917. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 17 (Septembre 2011) . - pp. 9910-9917 Mots-clés : Experimental  design Résumé : Strongly exothermic solution homopolymerizations are a class of chain reactions particularly difficult to be optimized from both a safety and a productivity viewpoint. Particularly, lots of side undesired reactions (e.g., backbiting, propagation of tertiary radicals, chain transfer to monomer or solvent, etc.), which affect the selectivity with respect to the desired product, and relevant mass and heat transfer problems, due to the increasing system viscosity, take place during such syntheses. Under these unavoidable operating conditions, it is difficult to employ theoretical procedures that are able to safely optimize the analyzed process, because the development of a reliable mathematical model is often not affordable or too time-consuming. In this work, it is shown that the topological criterion theory and its related optimization procedure can be used to optimize experimentally (through a dedicated set of isoperibolic reaction calorimetry tests) a complex reacting system even if its reaction scheme and all information about the kinetics are not available. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24483634

Topological criteria to safely optimize hazardous chemical processes involving consecutive reactions / Sabrina Copelli in Industrial & engineering chemistry research, Vol. 49 N° 10 (Mai 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 4583–4593 Titre : Topological criteria to safely optimize hazardous chemical processes involving consecutive reactions Type de document : texte imprimé Auteurs : Sabrina Copelli, Auteur ; Marco Derudi, Auteur ; Renato Rota, Auteur Année de publication : 2010 Article en page(s) : pp. 4583–4593 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Chemical  Processes Résumé : Safe operating conditions, for strongly exothermic chemical systems involving multiple reactions, are particularly critical to be obtained, because of the complex interactions between selectivity and safety constraints. In this work, new criteria, which are useful for isoperibolic semibatch processes involving consecutive reactions and based on the topology of a particular phase space, are presented. Such criteria are able to detect both the runaway boundary and the so-called “quick onset, fair conversion, smooth temperature profile” (QFS) operating region by performing a topological analysis of the phase space of the system of ordinary differential equations (ODEs) that describe the analyzed process. Moreover, a safe optimization procedure, the objective of which is to obtain the optimum values both of the dosing time of the dosed reactant and the initial reactor temperature, based on such criteria, has been developed. Finally, such a set of optimum operating parameters has been validated through a comparison with experimental data from published literature. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901679q [article] Topological criteria to safely optimize hazardous chemical processes involving consecutive reactions [texte imprimé] / Sabrina Copelli, Auteur ; Marco Derudi, Auteur ; Renato Rota, Auteur . - 2010 . - pp. 4583–4593. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 4583–4593 Mots-clés : Chemical  Processes Résumé : Safe operating conditions, for strongly exothermic chemical systems involving multiple reactions, are particularly critical to be obtained, because of the complex interactions between selectivity and safety constraints. In this work, new criteria, which are useful for isoperibolic semibatch processes involving consecutive reactions and based on the topology of a particular phase space, are presented. Such criteria are able to detect both the runaway boundary and the so-called “quick onset, fair conversion, smooth temperature profile” (QFS) operating region by performing a topological analysis of the phase space of the system of ordinary differential equations (ODEs) that describe the analyzed process. Moreover, a safe optimization procedure, the objective of which is to obtain the optimum values both of the dosing time of the dosed reactant and the initial reactor temperature, based on such criteria, has been developed. Finally, such a set of optimum operating parameters has been validated through a comparison with experimental data from published literature. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901679q