On the multiplicities of a catalytic distillation column for the deep hydrodesulfurization of light gas oil / A. Rosales-Quintero in Industrial & engineering chemistry research, Vol. 48 N°3 (Février 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N°3 (Février 2009) . - p. 1259–1269 Titre : On the multiplicities of a catalytic distillation column for the deep hydrodesulfurization of light gas oil Type de document : texte imprimé Auteurs : A. Rosales-Quintero, Auteur ; F. D. Vargas-Villamil, Auteur Année de publication : 2009 Article en page(s) : p. 1259–1269 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Gas Oil Catalytic distillation Hydrodesulfurization Résumé : Catalytic distillation integrates the reaction and separation into a single unit. Nevertheless, this integration leads to complex open-loop behaviors, as a consequence of nonlinear interactions. As a result, multiplicities and trajectories with complex attracting sets may arise. Multiplicities must be considered during design, operation, and control, because a process with multiplicities may be difficult to control and operate. In this work, the changes in the topological structure of the solutions of a light-gas-oil deep-hydrodesulfurization one-bed catalytic distillation column are studied. A cost-optimal operating point is chosen as a base case. It is obtained by minimizing the total annual cost, while keeping the total sulfur concentration less than 15 ppm. This design is studied to identify the operating region where multiplicities arise. A connection between operability (pressure) and design (catalyst mass) was made and a rich nonlinear behavior was found (i.e., isola branches, criss-cross patterns, cusp bifurcations, input multiplicities, output multiplicities, and input−output multiplicities). Bifurcation diagrams are presented for the most important design and control/operating variables. Yet, no multiplicity was found near the cost-optimal operating point; thus, its operation and control should not be a problem. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800586c [article] On the multiplicities of a catalytic distillation column for the deep hydrodesulfurization of light gas oil [texte imprimé] / A. Rosales-Quintero, Auteur ; F. D. Vargas-Villamil, Auteur . - 2009 . - p. 1259–1269. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°3 (Février 2009) . - p. 1259–1269 Mots-clés : Gas Oil Catalytic distillation Hydrodesulfurization Résumé : Catalytic distillation integrates the reaction and separation into a single unit. Nevertheless, this integration leads to complex open-loop behaviors, as a consequence of nonlinear interactions. As a result, multiplicities and trajectories with complex attracting sets may arise. Multiplicities must be considered during design, operation, and control, because a process with multiplicities may be difficult to control and operate. In this work, the changes in the topological structure of the solutions of a light-gas-oil deep-hydrodesulfurization one-bed catalytic distillation column are studied. A cost-optimal operating point is chosen as a base case. It is obtained by minimizing the total annual cost, while keeping the total sulfur concentration less than 15 ppm. This design is studied to identify the operating region where multiplicities arise. A connection between operability (pressure) and design (catalyst mass) was made and a rich nonlinear behavior was found (i.e., isola branches, criss-cross patterns, cusp bifurcations, input multiplicities, output multiplicities, and input−output multiplicities). Bifurcation diagrams are presented for the most important design and control/operating variables. Yet, no multiplicity was found near the cost-optimal operating point; thus, its operation and control should not be a problem. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800586c

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