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Radial pressure profiles in a cold-flow gas-solid vortex reactor.

Maria N Pantzali1, Jelena Z Kovacevic1, Geraldine J Heynderickx1

  • 1Laboratory for Chemical Technology Ghent University Technologiepark 914 B-9052 Gent Belgium.

Aiche Journal. American Institute of Chemical Engineers
|September 27, 2016
PubMed
Summary

A unique normalized radial pressure profile was identified in gas-solid vortex reactors across various conditions. This profile is predictable using momentum conservation equations for both gas and solid phases.

Keywords:
fluidizationgas‐solid vortex reactormultiphase flowpressure droppressure profile

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Area of Science:

  • Chemical Engineering
  • Fluid Dynamics
  • Particle Technology

Background:

  • Gas-solid vortex reactors are crucial in various industrial processes.
  • Understanding pressure dynamics within these reactors is key to optimizing performance.
  • Previous studies have not fully characterized the radial pressure profile across diverse operating conditions.

Purpose of the Study:

  • To identify and characterize a unique normalized radial pressure profile in a gas-solid vortex reactor.
  • To investigate the influence of particle properties and gas flow rates on this pressure profile.
  • To validate the predictive capability of momentum conservation equations for gas-solid flow.

Main Methods:

  • Experimental measurements of radial pressure profiles in a gas-solid vortex reactor.
  • Systematic variation of particle densities (950-1240 kg/m³), sizes (1-2 mm), solid capacities (2 kg to max), and gas flow rates (0.4-0.8 Nm³/s).
  • Application of combined momentum conservation equations for gas and solid phases, incorporating measured particle velocities.

Main Results:

  • A unique normalized radial pressure profile was observed across a wide range of operating conditions.
  • The normalized pressure profiles for particle-free flow merged into a single unique profile.
  • The combined momentum conservation equations accurately predicted the observed pressure profile when particle velocities were considered.

Conclusions:

  • The radial pressure profile in gas-solid vortex reactors exhibits a unique normalized characteristic.
  • This profile is predictable using fundamental momentum conservation principles for both phases.
  • The findings provide a basis for improved reactor design and operational control.