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Internal heat integration and controllability of double feed reactive distillation columns, 1. effect of feed tray location / M. V. Pavan Kumar in Industrial & engineering chemistry research, Vol. 47 N°19 (Octobre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N°19 (Octobre 2008) . - p. 7294–7303 Titre : Internal heat integration and controllability of double feed reactive distillation columns, 1. effect of feed tray location Type de document : texte imprimé Auteurs : M. V. Pavan Kumar, Auteur ; N. Kaistha, Auteur Année de publication : 2008 Article en page(s) : p. 7294–7303 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Feed  tray  locations  Reactive  distillation  columns  Steady-state  bifurcation  analysis Résumé : The impact of altering feed tray locations (for the purpose of saving energy) on the controllability of double feed reactive distillation (RD) columns is evaluated for two case studies: a hypothetical ideal RD column and a methyl acetate RD column. Energy savings of 18.3% and 36.4% over the conventional design (feed immediately above and below the reactive zone) is achieved for the ideal and methyl acetate systems, respectively. A steady-state bifurcation analysis shows that, for both systems, output multiplicity, with respect to reboiler duty, occurs at a fixed reflux rate for the different designs (conventional/altered feed tray location). The output multiplicity is eliminated at a fixed reflux ratio. Closed-loop dynamic simulation results show that the controllability of the internally heat integrated ideal RD column deteriorates, compared to the conventional design. Unlike the conventional design, temperature-based inferential control is infeasible and composition-based control structures must be used. For the methyl acetate column, on the other hand, heat integration by altering the feed locations entails no loss in controllability using two-point temperature inferential control. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071638n [article] Internal heat integration and controllability of double feed reactive distillation columns, 1. effect of feed tray location [texte imprimé] / M. V. Pavan Kumar, Auteur ; N. Kaistha, Auteur . - 2008 . - p. 7294–7303. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°19 (Octobre 2008) . - p. 7294–7303 Mots-clés : Feed  tray  locations  Reactive  distillation  columns  Steady-state  bifurcation  analysis Résumé : The impact of altering feed tray locations (for the purpose of saving energy) on the controllability of double feed reactive distillation (RD) columns is evaluated for two case studies: a hypothetical ideal RD column and a methyl acetate RD column. Energy savings of 18.3% and 36.4% over the conventional design (feed immediately above and below the reactive zone) is achieved for the ideal and methyl acetate systems, respectively. A steady-state bifurcation analysis shows that, for both systems, output multiplicity, with respect to reboiler duty, occurs at a fixed reflux rate for the different designs (conventional/altered feed tray location). The output multiplicity is eliminated at a fixed reflux ratio. Closed-loop dynamic simulation results show that the controllability of the internally heat integrated ideal RD column deteriorates, compared to the conventional design. Unlike the conventional design, temperature-based inferential control is infeasible and composition-based control structures must be used. For the methyl acetate column, on the other hand, heat integration by altering the feed locations entails no loss in controllability using two-point temperature inferential control. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie071638n