Documents disponibles écrits par cet auteur

Fluid catalytic cracking (FCC) process modeling, simulation, and control / Carla I. C. Pinheiro in Industrial & engineering chemistry research, Vol. 51 N° 1 (Janvier 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 1 (Janvier 2012) . - pp. 1-29 Titre : Fluid catalytic cracking (FCC) process modeling, simulation, and control Type de document : texte imprimé Auteurs : Carla I. C. Pinheiro, Auteur ; Joana L. Fernandes, Auteur ; Luís Domingues, Auteur Année de publication : 2012 Article en page(s) : pp. 1-29 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Modeling  Fluid  catalytic  cracking Résumé : This paper focuses on the fluid catalytic cracking (FCC) process and reviews recent developments in its modeling, monitoring, control, and optimization. This challenging process exhibits complex behavior, requiring detailed models to express the nonlinear effects and extensive interactions between input and control variables that are observed in industrial practice. The FCC models currently available differ enormously in terms of their scope, level of detail, modeling hypothesis, and solution approaches used. Nevertheless, significant benefits from their effective use in various routine tasks are starting to be widely recognized by the industry. To help improve the existing modeling approaches, this review describes and compares the different mathematical frameworks that have been applied in the modeling, simulation, control, and optimization of this key downstream unit. Given the effects that perturbations in the feedstock quality and other unit disturbances might have, especially when associated with frequent changes in market demand, this paper also demonstrates the importance of understanding the nonlinear behavior of the FCC process. The incentives associated with the use of advanced model-based supervision strategies, such as nonlinear model predictive control and real-time optimization techniques, are also presented and discussed. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476442 [article] Fluid catalytic cracking (FCC) process modeling, simulation, and control [texte imprimé] / Carla I. C. Pinheiro, Auteur ; Joana L. Fernandes, Auteur ; Luís Domingues, Auteur . - 2012 . - pp. 1-29. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 1 (Janvier 2012) . - pp. 1-29 Mots-clés : Modeling  Fluid  catalytic  cracking Résumé : This paper focuses on the fluid catalytic cracking (FCC) process and reviews recent developments in its modeling, monitoring, control, and optimization. This challenging process exhibits complex behavior, requiring detailed models to express the nonlinear effects and extensive interactions between input and control variables that are observed in industrial practice. The FCC models currently available differ enormously in terms of their scope, level of detail, modeling hypothesis, and solution approaches used. Nevertheless, significant benefits from their effective use in various routine tasks are starting to be widely recognized by the industry. To help improve the existing modeling approaches, this review describes and compares the different mathematical frameworks that have been applied in the modeling, simulation, control, and optimization of this key downstream unit. Given the effects that perturbations in the feedstock quality and other unit disturbances might have, especially when associated with frequent changes in market demand, this paper also demonstrates the importance of understanding the nonlinear behavior of the FCC process. The incentives associated with the use of advanced model-based supervision strategies, such as nonlinear model predictive control and real-time optimization techniques, are also presented and discussed. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25476442

Model development and validation of ethyl tert-butyl ether production reactors using industrial plant data / Luís Domingues in Industrial & engineering chemistry research, Vol. 51 N° 46 (Novembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 46 (Novembre 2012) . - pp. 15011-15017 Titre : Model development and validation of ethyl tert-butyl ether production reactors using industrial plant data Type de document : texte imprimé Auteurs : Luís Domingues, Auteur ; Carla I. C. Pinheiro, Auteur ; Nuno M. C. Oliveira, Auteur Année de publication : 2013 Article en page(s) : pp. 15011-15017 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Reactor  Production  Modeling Résumé : This work considers the development and validation of a first-principles dynamic model for the production of ethyl tert-butyl ether (ETBE) in the presence of the coproducts diisobutene (DIB) and tert-butyl alcohol (TBA). Desulfonation is assumed to be the main deactivation mechanism of the catalyst used, an acidic ion-exchange resin. Operational data from an industrial ETBE production plant, taken over the period of 1 year, were used to estimate both the deactivation and DIB kinetic constant parameters. A data reconciliation strategy was employed to convert the raw data into a consistent data set, representing the most likely process operation data. The parameters estimated were incorporated in a set of detailed mass and energy balances, together with additional kinetic and physical information from the literature, to originate a distributed parameter model capable of accurately describing the operation of two industrial reactors used for the production of ETBE. Model development and validation were performed in gPROMS Modelbuilder with the necessary physical properties calculated by Aspen Plus, through the CAPE-OPEN standard. The desulfonation decay order obtained was close to second order kinetics, previously proposed by other authors. The activation energy estimated for the desulfonation process was also comparable with past reported values, while the value of the pre-exponential factor for the desulfonation was slightly lower. Different temperature ranges and particle sizes are attributed as possible causes for the differences observed. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26679621 [article] Model development and validation of ethyl tert-butyl ether production reactors using industrial plant data [texte imprimé] / Luís Domingues, Auteur ; Carla I. C. Pinheiro, Auteur ; Nuno M. C. Oliveira, Auteur . - 2013 . - pp. 15011-15017. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 46 (Novembre 2012) . - pp. 15011-15017 Mots-clés : Reactor  Production  Modeling Résumé : This work considers the development and validation of a first-principles dynamic model for the production of ethyl tert-butyl ether (ETBE) in the presence of the coproducts diisobutene (DIB) and tert-butyl alcohol (TBA). Desulfonation is assumed to be the main deactivation mechanism of the catalyst used, an acidic ion-exchange resin. Operational data from an industrial ETBE production plant, taken over the period of 1 year, were used to estimate both the deactivation and DIB kinetic constant parameters. A data reconciliation strategy was employed to convert the raw data into a consistent data set, representing the most likely process operation data. The parameters estimated were incorporated in a set of detailed mass and energy balances, together with additional kinetic and physical information from the literature, to originate a distributed parameter model capable of accurately describing the operation of two industrial reactors used for the production of ETBE. Model development and validation were performed in gPROMS Modelbuilder with the necessary physical properties calculated by Aspen Plus, through the CAPE-OPEN standard. The desulfonation decay order obtained was close to second order kinetics, previously proposed by other authors. The activation energy estimated for the desulfonation process was also comparable with past reported values, while the value of the pre-exponential factor for the desulfonation was slightly lower. Different temperature ranges and particle sizes are attributed as possible causes for the differences observed. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26679621