A two-zone fluidized bed reactor for catalytic propane dehydrogenation

Jorge Gascon Sabate, C. Téllez, J. Herguido, M. Menéndez*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

A new reactor technology is employed for propane dehydrogenation over a Cr2O3/Al2O3 catalyst. This reactor allows the continuous regeneration of the catalyst, but avoids the transfer of large amounts of solid between two reactors, since one single vessel is employed. The experimental work was carried out in a bench scale reactor using two configurations: (a) a two-zone fluidized bed reactor (TZFBR), where propane and oxygen are fed at different levels, providing separated zones for the reaction and catalyst regeneration; (b) an internal circulating fluidized bed reactor (ICFBR), where the addition of an axial dividing slab allows the partition of the vessel, giving two beds connected at the top and bottom and enabling better catalyst circulation. The effects of the main operating variables were studied: bed temperature, gas velocity, oxygen flow rate fed to the reactor, relative length between the oxidizing and reacting zones and the W/F ratio. Under suitable conditions, steady-state operation with propene yields as high as 30% can be achieved, with small requirements of oxygen to continuously regenerate the catalyst.

Original languageEnglish (US)
Pages (from-to)91-96
Number of pages6
JournalChemical Engineering Journal
Volume106
Issue number2
DOIs
StatePublished - Feb 15 2005

Keywords

  • Catalyst deactivation
  • Circulating fluidized bed
  • CrO/AlO catalysts
  • Propane dehydrogenation

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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