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Wiley, The Canadian Journal of Chemical Engineering, 4(70), p. 780-785, 1992

DOI: 10.1002/cjce.5450700423

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Multiplicity of solutions in the optimization of a bifunctional catalyst blend in a tubular reactor

Journal article published in 1992 by Rein Luus, Joaichim Dittrich, Frerich J. Keil
This paper is available in a repository.
This paper is available in a repository.

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Abstract

The reaction scheme for the isomerization and hydrogenation of methylcyclopentane using bifunctional catalyst is considered in a tubular reactor. The aim is to maximize the concentration of benzene at the outlet of the reactor by choosing the optimal blend of the catalyst along the reactor. When the problem was attempted by nonlinear programming employing sequential quadratic programming, twenty-five local optima were obtained from 100 random starting conditions. By using iterative dynamic programming in addition to the best two local optima obtained by nonlinear programming, the global optimum was also obtained.On a examiné le schéma de réaction pour l'isomérisation et l'hydrogénation du méthylcyclopentane à l'aide d'un catalyseur bifonctionnel dans un réacteur tubulaire. Le but était de maximiser la concentration en benzène à la sortie du réacteur en choisissant le méTange de catalyseur optimal selon le réacteur. En abordant le problème par la program-mation non linéaire de type quadratique séquentiel, on a obtenu vingt-cinq optimums locaux à partir de 100 conditions de démarrage aléatoires. Par la programmation dynamique itérative, en plus des deux meilleurs optimums locaux obtenus par la programmation non linéaire, l'optimum global a pu e'tre obtenu.