Numerical analysis of the optimal catalyst distribution in created unsteady state conditions

Journal of the Iranian Chemical Research

مقاله 5، دوره 2، شماره 2، شهریور 2009، صفحه 121-131   

نویسندگان

Yacine Benguerba^* ؛ Brahim Djellouli؛ Lemnouer Chibane؛ Lahcene Bencheikh

Laboratoire de Génie des Procédés Chimiques, Université Ferhat Abbas Sétif, 19000, Sétif, Algérie

چکیده

The determination of the optimal distribution of the catalytic activity profile, which
maximizes the catalytic effectiveness, in created unsteady state conditions, is analyzed and
treated numerically for the case of a simple reaction. It was proven that the modulation, of the
temperature and the reactant concentration of the external bulk fluid, leads to a considerable
increase of the catalytic effectiveness. The optimal active element distribution is a Dirac- δ
function i.e. all the catalyst must be deposited at a specific distance from the center of the
catalytic pellet. It was shown that this optimal position changes with time in a sinusoidal manner.
This purpose can be achieved by the use of ultrasounds to artificially control the activity profile.

کلیدواژه‌ها

Unsteady state؛ Optimal catalyst distribution؛ Forced perturbation؛ Temperature modulation؛ Concentration modulation

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