The influence of the fluidization velocities on products yield and catalyst residence time in industrial risers

H. C. Alvarez-Castro, E. M. Matos, M. Mori, W. Martignoni, R. Ocone

Research output: Contribution to journalArticle

Abstract

The hydrodynamic characteristic of the industrial riser used in the fluid catalytic cracking (FCC) process has been simulated. A gas-solid flow model was developed which describes a 3D industrial set-up. By combining the hydrodynamics with a reaction model the yields of the different product families were obtained with good precision. To represent the kinetic behavior, a twelve-lump model with catalyst deactivation was adopted to represent the kinetic behavior. A tracer technique for catalyst residence time, corresponding to different fluidization velocities, was also considered. The Eulerian-Eulerian approach was adopted and solved by ANSYS CFX 14.0. The results show predictions for fluidization velocities and residence time which should be adopted to get better product yields in the industrial process. The results are compared with data taken in an industrial plant. The model furnishes valuable information on the impact of the riser hydrodynamics on the product quality.

Original languageEnglish
Pages (from-to)836-847
Number of pages12
JournalAdvanced Powder Technology
Volume26
Issue number3
Early online date2 Mar 2015
DOIs
Publication statusPublished - 2015

Fingerprint

Fluidization
Catalysts
Hydrodynamics
Fluid catalytic cracking
Flow of solids
Catalyst deactivation
Kinetics
Industrial plants
Gases

Keywords

  • Catalytic cracking reaction
  • CFD simulation
  • FCC
  • Gas particle flow
  • Petroleum refining
  • Riser

Cite this

Alvarez-Castro, H. C. ; Matos, E. M. ; Mori, M. ; Martignoni, W. ; Ocone, R. / The influence of the fluidization velocities on products yield and catalyst residence time in industrial risers. In: Advanced Powder Technology. 2015 ; Vol. 26, No. 3. pp. 836-847.
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The influence of the fluidization velocities on products yield and catalyst residence time in industrial risers. / Alvarez-Castro, H. C.; Matos, E. M.; Mori, M.; Martignoni, W.; Ocone, R.

In: Advanced Powder Technology, Vol. 26, No. 3, 2015, p. 836-847.

Research output: Contribution to journalArticle

TY - JOUR

T1 - The influence of the fluidization velocities on products yield and catalyst residence time in industrial risers

AU - Alvarez-Castro, H. C.

AU - Matos, E. M.

AU - Mori, M.

AU - Martignoni, W.

AU - Ocone, R.

N1 - "The authors are grateful for the financial support of Petrobras for this research."

PY - 2015

Y1 - 2015

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AB - The hydrodynamic characteristic of the industrial riser used in the fluid catalytic cracking (FCC) process has been simulated. A gas-solid flow model was developed which describes a 3D industrial set-up. By combining the hydrodynamics with a reaction model the yields of the different product families were obtained with good precision. To represent the kinetic behavior, a twelve-lump model with catalyst deactivation was adopted to represent the kinetic behavior. A tracer technique for catalyst residence time, corresponding to different fluidization velocities, was also considered. The Eulerian-Eulerian approach was adopted and solved by ANSYS CFX 14.0. The results show predictions for fluidization velocities and residence time which should be adopted to get better product yields in the industrial process. The results are compared with data taken in an industrial plant. The model furnishes valuable information on the impact of the riser hydrodynamics on the product quality.

KW - Catalytic cracking reaction

KW - CFD simulation

KW - FCC

KW - Gas particle flow

KW - Petroleum refining

KW - Riser

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