Simulation of an industrial trickle bed hydrogenation reactor in the pulsing flow regime

Zhen Min Cheng, Zhi Ming Zhou, Hua Jiang Huang, Pei Qing Yuan, Dong Yang

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

An industrial trickle bed reactor was simulated for pyrolysis gasoline selective hydrogenation. The operation was recognised in the upper limit of pulsing flow regime by the Charpentier-Tosun flow pattern diagram at a very low hydrogen to oil volumetric ratio. Hydrodynamic parameters in the pulsing flow regime were calculated from the literature correlations which apply to the hydrogen-paraffin system. The external wetting efficiency which should be no higher than 100% was found to be 147% according to the correlation of Al-Dahhan and Dudukovic (1995), due to the undefined upper limit of their equation. The reactor simulation shows the gas-liquid and liquid-solid mass transfer rates were large enough for the active Pd hydrogenation catalyst. By comparing with the mass transfer rate in the Taylor flow regime in a monolithic structure, it shows the hydrogen concentration in the liquid phase in an industrial trickle reactor is more than two times of that in the monolith, which implies the substitution of the conventional catalyst pellet by the monolith is not required.

Original languageEnglish (US)
Pages (from-to)211-221
Number of pages11
JournalInternational Journal of Engineering Systems Modelling and Simulation
Volume1
Issue number4
DOIs
StatePublished - Jan 1 2009

Keywords

  • hydrodynamic parameter
  • hydrogenation reactor
  • pulsing flow
  • reactor simulation
  • trickle bed

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