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Efficient and robust method for numerical analysis of dead zone in catalyst particle and packed bed reactor.
  • Mirosław Szukiewicz,
  • Krzysztof Kaczmarski
Mirosław Szukiewicz
Rzeszow University of Technology
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Krzysztof Kaczmarski
Rzeszów University of Technology
Author Profile


For two processes of large importance, catalysis and biocatalysis, were reported zones without reactants, so called dead zone (DZ). They results from diffusional transport limitations, when apparent reaction order is between (-1..1). Formation of DZ reduces effectiveness of catalyst and influence packed bed reactor productivity. For simple reaction kinetic model, a DZ width inside a pellet can be calculated analytically solving appropriate differential mass balance model. However, generally the analytical solution is unknown and only with using numerical method the position of DZ can be established. The problem with DZ appearance belongs to problems with moving boundaries. Its solution requires application of special numerical procedure and relatively long CPU time. In this work it was proposed a simple, very fast numerical method for calculation of DZ position inside pellet. The method proposed combined with orthogonal collocation on finite elements can be applied for analysis of work of packed bed reactor.
28 Jan 2020Submitted to Engineering Reports
30 Jan 2020Submission Checks Completed
30 Jan 2020Assigned to Editor
29 May 2020Reviewer(s) Assigned
14 Jul 2020Editorial Decision: Reject & Resub
09 Oct 20201st Revision Received
10 Oct 2020Submission Checks Completed
10 Oct 2020Assigned to Editor
16 Nov 2020Reviewer(s) Assigned
13 Jan 2021Editorial Decision: Accept
03 Feb 2021Published in Engineering Reports. 10.1002/eng2.12370