Documents disponibles écrits par cet auteur

Methodology for the design of optimal chemical reactors based on the concept of elementary process functions / Andreas Peschel in Industrial & engineering chemistry research, Vol. 49 N° 21 (Novembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 21 (Novembre 2010) . - pp. 10535-10548 Titre : Methodology for the design of optimal chemical reactors based on the concept of elementary process functions Type de document : texte imprimé Auteurs : Andreas Peschel, Auteur ; Hannsjorg Freund, Auteur ; Kai Sundmacher, Auteur Année de publication : 2011 Article en page(s) : pp. 10535-10548 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Chemical  reactor  Optimal  design Résumé : In this contribution, a methodology for the optimal design of chemical reactors based on the best reaction route in the thermodynamic state space is proposed. This route is obtained by tracking a fluid element on its way through the reactor and manipulating the fluxes into this element. Instead of choosing the reactor design a priori and optimizing the free parameters of the chosen reactor setup, an innovative reactor design is developed based on the optimal flux profiles. Besides classical reactor concepts, this methodology is suited to investigate the potential of different process intensification options such as integration of reaction, cooling and separation in a single apparatus, or the application of high interface areas for heat and mass transfer. The methodology is exemplarily illustrated for the development of a new SO2 oxidation reactor. The residence time as an example for a meaningful objective is minimized, and a reduction of 69% compared to the optimized technical reference case is achieved. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23447946 [article] Methodology for the design of optimal chemical reactors based on the concept of elementary process functions [texte imprimé] / Andreas Peschel, Auteur ; Hannsjorg Freund, Auteur ; Kai Sundmacher, Auteur . - 2011 . - pp. 10535-10548. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 21 (Novembre 2010) . - pp. 10535-10548 Mots-clés : Chemical  reactor  Optimal  design Résumé : In this contribution, a methodology for the optimal design of chemical reactors based on the best reaction route in the thermodynamic state space is proposed. This route is obtained by tracking a fluid element on its way through the reactor and manipulating the fluxes into this element. Instead of choosing the reactor design a priori and optimizing the free parameters of the chosen reactor setup, an innovative reactor design is developed based on the optimal flux profiles. Besides classical reactor concepts, this methodology is suited to investigate the potential of different process intensification options such as integration of reaction, cooling and separation in a single apparatus, or the application of high interface areas for heat and mass transfer. The methodology is exemplarily illustrated for the development of a new SO2 oxidation reactor. The residence time as an example for a meaningful objective is minimized, and a reduction of 69% compared to the optimized technical reference case is achieved. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23447946

A novel reactive distillation process for the indirect hydration of cyclohexene to cyclohexanol using a reactive entrainer / Frank Steyer in Industrial & engineering chemistry research, Vol. 47 N° 23 (Décembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N° 23 (Décembre 2008) . - p. 9581–9587 Titre : A novel reactive distillation process for the indirect hydration of cyclohexene to cyclohexanol using a reactive entrainer Type de document : texte imprimé Auteurs : Frank Steyer, Auteur ; Hannsjorg Freund, Auteur ; Kai Sundmacher, Auteur Année de publication : 2009 Article en page(s) : p. 9581–9587 Note générale : Chemistry engineering Langues : Anglais (eng) Mots-clés : Reactive  distillation  Cyclohexene  Cyclohexanol Résumé : In the conventional process for cyclohexanol production, large amounts of energy are consumed and a considerable quantity of side products is formed. In addition, the process is inherently unsafe. The alternative process of cyclohexene direct hydration requires large amounts of catalyst to overcome kinetic limitations. This publication shows the feasibility of a new route from cyclohexene to cyclohexanol by means of reactive distillation using formic acid as a reactive entrainer. This allows overcoming kinetic limitations with moderate amounts of catalyst and makes large-scale cyclohexanol production by reactive distillation an interesting alternative. The suggested coupled reactive distillation process allows producing cyclohexanol in an inherently safe and energetically advantageous way without incurring significant amounts of side products. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800303k [article] A novel reactive distillation process for the indirect hydration of cyclohexene to cyclohexanol using a reactive entrainer [texte imprimé] / Frank Steyer, Auteur ; Hannsjorg Freund, Auteur ; Kai Sundmacher, Auteur . - 2009 . - p. 9581–9587. Chemistry engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N° 23 (Décembre 2008) . - p. 9581–9587 Mots-clés : Reactive  distillation  Cyclohexene  Cyclohexanol Résumé : In the conventional process for cyclohexanol production, large amounts of energy are consumed and a considerable quantity of side products is formed. In addition, the process is inherently unsafe. The alternative process of cyclohexene direct hydration requires large amounts of catalyst to overcome kinetic limitations. This publication shows the feasibility of a new route from cyclohexene to cyclohexanol by means of reactive distillation using formic acid as a reactive entrainer. This allows overcoming kinetic limitations with moderate amounts of catalyst and makes large-scale cyclohexanol production by reactive distillation an interesting alternative. The suggested coupled reactive distillation process allows producing cyclohexanol in an inherently safe and energetically advantageous way without incurring significant amounts of side products. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800303k

Two-step reactive distillation process for cyclohexanol production from cyclohexene / Amit Katariya in Industrial & engineering chemistry research, Vol. 48 N° 21 (Novembre 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 21 (Novembre 2009) . - pp. 9534–9545 Titre : Two-step reactive distillation process for cyclohexanol production from cyclohexene Type de document : texte imprimé Auteurs : Amit Katariya, Auteur ; Hannsjorg Freund, Auteur ; Kai Sundmacher, Auteur Année de publication : 2010 Article en page(s) : pp. 9534–9545 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Cyclohexanol  Reactive  distillation  Cyclohexene Résumé : The present work deals with a novel and attractive alternative process route for the production of cyclohexanol by indirect hydration of cyclohexene using reactive distillation. The proposed two-step process comprises the esterification of cyclohexene with formic acid followed by the hydrolysis of the formed ester. The principle feasibility of this new process has recently been proved by means of residue curve analysis [Steyer et al. Ind. Eng. Chem. Res. 2008, 47, 9581−9587]. In the present contribution, detailed equilibrium stage simulations are performed to identify the optimum design and operating conditions for the coupled reactive distillation column scheme. The simulations reveal that it is possible to achieve almost complete conversion of cyclohexene to cyclohexanol with a comparatively low amount of catalyst. To the best of our knowledge, this is the first time that such an outstanding performance of a process for the production of cyclohexanol is reported. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801649v [article] Two-step reactive distillation process for cyclohexanol production from cyclohexene [texte imprimé] / Amit Katariya, Auteur ; Hannsjorg Freund, Auteur ; Kai Sundmacher, Auteur . - 2010 . - pp. 9534–9545. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 21 (Novembre 2009) . - pp. 9534–9545 Mots-clés : Cyclohexanol  Reactive  distillation  Cyclohexene Résumé : The present work deals with a novel and attractive alternative process route for the production of cyclohexanol by indirect hydration of cyclohexene using reactive distillation. The proposed two-step process comprises the esterification of cyclohexene with formic acid followed by the hydrolysis of the formed ester. The principle feasibility of this new process has recently been proved by means of residue curve analysis [Steyer et al. Ind. Eng. Chem. Res. 2008, 47, 9581−9587]. In the present contribution, detailed equilibrium stage simulations are performed to identify the optimum design and operating conditions for the coupled reactive distillation column scheme. The simulations reveal that it is possible to achieve almost complete conversion of cyclohexene to cyclohexanol with a comparatively low amount of catalyst. To the best of our knowledge, this is the first time that such an outstanding performance of a process for the production of cyclohexanol is reported. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801649v