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Licensed Unlicensed Requires Authentication Published by De Gruyter November 4, 2015

Modeling and Simulation Study of an Industrial Radial Moving Bed Reactor for Propane Dehydrogenation Process

  • Sim Yee Chin EMAIL logo , Anwaruddin Hisyam and Haniif Prasetiawan


An accurate model is required to optimize the propane dehydrogenation reaction carried out in the radial moving bed reactors (RMBR). The present study modeled the RMBR using a plug flow reactor model incorporated with kinetic models expressed in simple power-law model. Catalyst activity and coke formation were also considered. The model was solved numerically by discretizing the RMBR in axial and radial directions. The optimized kinetic parameters were then used to predict the trends of propane conversion, temperature, catalyst activity and coke content in the RMBR along axial and radial directions. It was found that the predicted activation energies of the propane dehydrogenation, propane cracking and ethylene hydrogenation were in reasonable agreement with the experimental values reported in the literature. The model developed has accurately predicted the reaction temperature profile, conversion profile and catalyst coke content. The deviations of these simulated results from the plant data were less than 5%.


The authors would like to acknowledge MOE for the financial support under Knowledge Transfer Program project, RDU 121001.

List of Symbols


Heat capacity of componentFA


Molar flow rate of component h, kmol/hr


height of catalyst bed, m


Number of elements in the axial


Number of elements in the radial


Reaction equilibrium constant for propane dehydrogenation, kPa


Rate constant for forward reaction, kmol/(


Rate constant for backward reaction, kmol/(


Rate constant for propane cracking, kmol/(


Rate constant for ethylene hydrogenolysis, kmol/(


Partial pressure of component R1, kPaG


Bed inner radius, m


Bed outer radius, m


Rate of disappearance of reactant in reaction TRef, kmol/(kg. hr)


Reference temperature, K


Weight of catalyst, kg


Heat of reaction for reaction T at certain temperature (Δr)


Elemental ring thickness


Elemental height thickness


Bulk density of catalyst, kg/m3


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Published Online: 2015-11-4
Published in Print: 2016-2-1

©2016 by De Gruyter

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