Design of hybrid distillation-vapor membrane separation systems / Jose A. Caballero in Industrial & engineering chemistry research, Vol. 48 N° 20 (Octobre 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N° 20 (Octobre 2009) . - pp. 9151–9162 Titre : Design of hybrid distillation-vapor membrane separation systems Type de document : texte imprimé Auteurs : Jose A. Caballero, Auteur ; Ignacio E. Grossmann, Auteur ; Majid Keyvani, Auteur Année de publication : 2010 Article en page(s) : pp. 9151–9162 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Hybrid separation system Distillation column Parallel membrane Two-stage approach Résumé : Currently the separation of olefins (ethylene, propylene) from (ethane, propane) on a commercial scale is performed almost exclusively by cryogenic distillation in petrochemical industries. Since this technology is highly energy intensive, there is a strong economic incentive to explore alternative separation technologies with lower energy consumption. In this work, using the separation of ethylene and ethane as a representative case, a mathematical programming approach is proposed to optimize and retrofit a hybrid separation system consisting of a distillation column and a parallel membrane separation unit. A two-stage approach is used. First, a shortcut model is introduced that allows determining whether the hybrid system could be of interest and the order of magnitude of the energy savings that can be expected. Second, a superstructure optimization approach is proposed that uses rigorous models for both the column and the membrane using a process simulator and state of the art MINLP solvers. The results presented in the case study show that significant savings in total costs and energy (up to 30%) can be obtained with the hybrid system. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900499y [article] Design of hybrid distillation-vapor membrane separation systems [texte imprimé] / Jose A. Caballero, Auteur ; Ignacio E. Grossmann, Auteur ; Majid Keyvani, Auteur . - 2010 . - pp. 9151–9162. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 20 (Octobre 2009) . - pp. 9151–9162 Mots-clés : Hybrid separation system Distillation column Parallel membrane Two-stage approach Résumé : Currently the separation of olefins (ethylene, propylene) from (ethane, propane) on a commercial scale is performed almost exclusively by cryogenic distillation in petrochemical industries. Since this technology is highly energy intensive, there is a strong economic incentive to explore alternative separation technologies with lower energy consumption. In this work, using the separation of ethylene and ethane as a representative case, a mathematical programming approach is proposed to optimize and retrofit a hybrid separation system consisting of a distillation column and a parallel membrane separation unit. A two-stage approach is used. First, a shortcut model is introduced that allows determining whether the hybrid system could be of interest and the order of magnitude of the energy savings that can be expected. Second, a superstructure optimization approach is proposed that uses rigorous models for both the column and the membrane using a process simulator and state of the art MINLP solvers. The results presented in the case study show that significant savings in total costs and energy (up to 30%) can be obtained with the hybrid system. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie900499y

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