Documents disponibles écrits par cet auteur

Comparison of dynamic and static performances of a quaternary distillation sequence / Gholamreza Baghmisheh in Industrial & engineering chemistry research, Vol. 49 N° 13 (Juillet 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 13 (Juillet 2010) . - pp. 6135–6143 Titre : Comparison of dynamic and static performances of a quaternary distillation sequence Type de document : texte imprimé Auteurs : Gholamreza Baghmisheh, Auteur ; Mohammad Shahrokhi, Auteur ; Ramin Bozorgmehri, Auteur Année de publication : 2010 Article en page(s) : pp. 6135–6143 Note générale : Chemistry engineering Langues : Anglais (eng) Mots-clés : Quaternary  distillation  column  sequences  dynamic  performance Résumé : In this work, steady state and dynamic performances of quaternary distillation column sequences designed based on steady state and dynamic cost functions have been investigated. To quantify the dynamic performance, product losses due to disturbances have been considered in the objective function. In addition, variations of operating costs such as utilities have been considered in the objective function. To separate a quaternary mixture into four products, 22 configurations have been used. It has been observed that the feed composition, disturbance frequency and magnitude affect the dynamic behavior strongly. To decrease the optimization computational load, a scheme that provides a suboptimal result has been proposed. By performing simultaneous optimization that requires much more computational time, it has been shown that the highest ranking configurations obtained by the proposed method are the same as those provided by simultaneous technique. The simulation results indicate that there is no clear pattern for configuration ranking based on column sequence specifications. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100169p [article] Comparison of dynamic and static performances of a quaternary distillation sequence [texte imprimé] / Gholamreza Baghmisheh, Auteur ; Mohammad Shahrokhi, Auteur ; Ramin Bozorgmehri, Auteur . - 2010 . - pp. 6135–6143. Chemistry engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 13 (Juillet 2010) . - pp. 6135–6143 Mots-clés : Quaternary  distillation  column  sequences  dynamic  performance Résumé : In this work, steady state and dynamic performances of quaternary distillation column sequences designed based on steady state and dynamic cost functions have been investigated. To quantify the dynamic performance, product losses due to disturbances have been considered in the objective function. In addition, variations of operating costs such as utilities have been considered in the objective function. To separate a quaternary mixture into four products, 22 configurations have been used. It has been observed that the feed composition, disturbance frequency and magnitude affect the dynamic behavior strongly. To decrease the optimization computational load, a scheme that provides a suboptimal result has been proposed. By performing simultaneous optimization that requires much more computational time, it has been shown that the highest ranking configurations obtained by the proposed method are the same as those provided by simultaneous technique. The simulation results indicate that there is no clear pattern for configuration ranking based on column sequence specifications. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100169p

Novel type of four - impinging - jets reactor for oxidative desulfurization of light fuel oils / Mohammad Amin Sobati in Industrial & engineering chemistry research, Vol. 49 N° 19 (Octobre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 9339–9348 Titre : Novel type of four - impinging - jets reactor for oxidative desulfurization of light fuel oils Type de document : texte imprimé Auteurs : Mohammad Amin Sobati, Auteur ; Asghar Molaei Dehkordi, Auteur ; Mohammad Shahrokhi, Auteur Année de publication : 2010 Article en page(s) : pp. 9339–9348 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Oxidative  Desulfurization Résumé : A novel type of four-impinging-jets reactor (FIJR) has been proposed and tested successfully for the oxidative desulfurization of kerosene as a typical light fuel oil. The FIJR is characterized by a high-intensity mixing chamber located at the bottom of the reactor and equipped with four impinging jets. The influences of various operating and design parameters such as feed flow rate, internozzle distance, jet diameter, and jet Reynolds number on the performance of the FIJR have been carefully investigated. As a result of both the impinging process and shear forces exerted on the phases, the rate of desulfurization in FIJR increased significantly compared to that obtained by a conventional reactor system such as stirred-tank reactor (STR). This can be attributed to a decrease in the mass-transfer resistance, complex flow pattern within the reaction chamber, energy released as the result of impinging-jets collision, and high intensity mixing at the impingement zone of FIJR. Moreover, about 92% sulfur removal of kerosene has been obtained in FIJR. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101065q [article] Novel type of four - impinging - jets reactor for oxidative desulfurization of light fuel oils [texte imprimé] / Mohammad Amin Sobati, Auteur ; Asghar Molaei Dehkordi, Auteur ; Mohammad Shahrokhi, Auteur . - 2010 . - pp. 9339–9348. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) . - pp. 9339–9348 Mots-clés : Oxidative  Desulfurization Résumé : A novel type of four-impinging-jets reactor (FIJR) has been proposed and tested successfully for the oxidative desulfurization of kerosene as a typical light fuel oil. The FIJR is characterized by a high-intensity mixing chamber located at the bottom of the reactor and equipped with four impinging jets. The influences of various operating and design parameters such as feed flow rate, internozzle distance, jet diameter, and jet Reynolds number on the performance of the FIJR have been carefully investigated. As a result of both the impinging process and shear forces exerted on the phases, the rate of desulfurization in FIJR increased significantly compared to that obtained by a conventional reactor system such as stirred-tank reactor (STR). This can be attributed to a decrease in the mass-transfer resistance, complex flow pattern within the reaction chamber, energy released as the result of impinging-jets collision, and high intensity mixing at the impingement zone of FIJR. Moreover, about 92% sulfur removal of kerosene has been obtained in FIJR. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101065q