“Catalyst Deactivation: Control Relevance of Model Assumptions”

Authors: Bernt Lie and David M. Himmelblau,
Affiliation: Telemark University College and University of Austin, Texas
Reference: 2000, Vol 21, No 4, pp. 241-253.

Keywords: Catalyst deactivation, dynamic models, population balance, activity model, analysis

Abstract: Two principles for describing catalyst deactivation are discussed, one based on the deactivation mechanism, the other based on the activity and catalyst age distribution. When the model is based upon activity decay, it is common to use a mean activity developed from the steady-state residence time distribution. We compare control-relevant properties of such an approach with those of a model based upon the deactivation mechanism. Using a continuous stirred tank reactor as an example, we show that the mechanistic approach and the population balance approach lead to identical models. However, common additional assumptions used for activity-based models lead to model properties that may deviate considerably from the correct one.

PDF PDF (1785 Kb)        DOI: 10.4173/mic.2000.4.3

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  title={{Catalyst Deactivation: Control Relevance of Model Assumptions}},
  author={Lie, Bernt and Himmelblau, David M.},
  journal={Modeling, Identification and Control},
  publisher={Norwegian Society of Automatic Control}